THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 27(5),

Size: px
Start display at page:

Download "THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 27(5),"

Transcription

1 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 27(5), ISSN (Print) ISSN X (Online) USRP RIO SDR 5G LTE-TDD HD Design and Implementation of 5G mmwave LTE-TDD HD Video Streaming System for USRP RIO SDR 곽경훈 신봉득 박동욱 어윤성 오혁준 Gyoung-Hun Gwag Bong-Deug Shin Dong-Wook Park* Yun-Seong Eo* Hyuk-Jun Oh 요약 3GPP LTE(Long Term Evolution)-TDD(Time Division Duplexing) NI(National Instruments) USRP RIO SDR(Software Defined Radio) 28 GHz HD 1T-1R(1 Transmitter-1 Receiver). Verilog LTE-TDD USRP RIO Xilinx Kintex-7 USRP RIO, USRP RIO 28 GHz RF 4 8 HD. USRP RIO Host PC PCI express(peripheral Component Interconnect express) dbc EVM(Error Vector Magnitude), HD. Abstract This paper presents the implementation and design of the 1T-1R wireless HD video streaming systems over 28 GHz mmwave frequency using 3GPP LTE-TDD standard on NI USRP RIO SDR platform. The baseband of the system uses USRP RIO that are stored in Xilinx Kintex-7 chip to implement LTE-TDD transceiver modem, the signal that are transceived from USRP RIO up or down converts to 28 GHz by using self-designed 28 GHz RF transceiver modules and it is finally communicated HD video data through self-designed 4 8 sub array antennas. It is that communication method between USRP RIO and Host PC use PCI express 4 to minimize delay of data to transmit and receive. The implemented system show high error vector magnitude performance above dbc and to transceive HD video in experiment environment anywhere. Key words: 5G, mmwave, USRP RIO, OFDM, LTE-TDD ( ) (Department of Electronics and Communications Engineering, Kwangwoon University) * (Department of Electronic Engineering, Kwangwoon University) Manuscript received March 15, 2016 ; Revised April 20, 2016 ; Accepted April 29, (ID No ) Corresponding Author: Hyuk-Jun Oh ( hj_oh@kw.ac.kr) c Copyright The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved. 445

2 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 5, May 서론. 4G. 3GPP 4 5G Release 14,, 5G. 5G 4G, (mmwave) [1]. [2] G, KT 28 GHz. 28 GHz [3]. 28 GHz LTE-TDD(Long Term Evolution-Time Division Duplexing) HD. EVM(Error Vector Magnitude). LOS(Line Of Sight) HD. 그림 1. USRP RIO Fig. 1. USRP RIO block diagram.. 1 USRP RIO(NI USRP-2942R) Xilinx Kintex-7 LabVIEW FPGA(Field Programmable Gate Array). USRP RIO PC PCIe(PCI Express) MB/s. 40 MHz 2 (RF 0, RF 1) 400 MHz 4.4 GHz. I(In-phase)/Q(Quadrature-phase) Sample rate 120 MS/s, 1,024 MB [4]. 2 RF. I/Q RF, RF I/Q.. 본론 2-1 USRP RIO SDR USRP RIO SDR(Software Defined Radio) NI (National Instruments) LabVIEW I/O(RIO) 그림 2. USRP RIO RF Fig. 2. USRP RIO RF block diagram. 446

3 을 이용한 5G 밀리미터파 LTE-TDD HD 비디오 스트리밍 시스템 설계 및 구현 USRP RIO SDR 컨셉 그림 3. USRP RIO LabVIEW FPGA Fig. 3. USRP RIO LabVIEW FPGA concept. 서브 배열 안테나 그림 Fig sub array antenna. 2-2 LabVIEW FPGA 는 FPGA 모듈을 이용하여 LabVIEW 코드를 하드웨어용으로 컴파일하는데, 그림 3과 같은 과정 을 거치게 된다. FPGA 모듈이 코드를 VHDL로 변환하면 Xilinx ISE 컴파일러가 변환된 VHDL 코드를 통합하여 LabVIEW 설계를 하드웨어 회로에 구현한다. 그 결과, LabVIEW가 FPGA 타겟에 다운로드할 프로그램 명령이 들어 있는 비트 파일이 생성된다. 생성된 비트 파일을 기 반으로 게이트 어레이 로직이 재구성되어 FPGA 칩에 로 드된다. 또한 LabVIEW는 Verilog 언어로 설계된 코드를 LabVIEW 프로젝트로 반입할 수 있도록 CLIP(Component Level Intellectual Property) 노드를 지원한다. CLIP 노드를 통 해 Verilog 코드를 LabVIEW FPGA 하드웨어에 반입하 여 LabVIEW FPGA 다이어그램을 통해 통신할 수 있도록 한다. 본 논문에서는 이와 같은 방식을 이용해 Verilog 언어 로 구현한 송수신 모뎀부를 LabVIEW 소프트웨어에 통합 하였다. LabVIEW FPGA 송수신기 모듈 그림 GHz RF Fig GHz RF transceiver module. 2-3 HD 비디오 송수신 시스템 비디오 스트리밍 시스템은 그림 5의 RF 송수신기 모듈을 이용해 28 GHz로 업 다운 변환을 수행하고, 그림 4의 4 8 형태의 0도 스캔 각도를 가지는 안테나를 사용해 HD 송수신기 모듈 블록도 그림 GHz RF Fig GHz RF transceiver module block diagram. 447

4 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 5, May 그림 7. Fig. 7. Overall system architecture.. 7. PC, USRP RIO, 28 GHz, PLL 4 8. PC PCIe 4, USRP RIO MXI HD. 3GPP LTE, 8. LTE-TDD(Time Division Duplex) 10 ms 5 ms 2, 1 ms 5., 10, 0.5 ms 2. DwPTS(Downlink Pilot Time Slot), GP (Guard Period) UpPTS(Uplink Pilot Time Slot). DL(Downlink) UL(Uplink) GP, DwPTS ( #0, #5) DL, UpPTS #2 UL, DL UL [5] GPP LTE Verilog LabVIEW FP- GA. HD PC LabVIEW, Verilog. HD UDP(User Datagram Protocol) LabVIEW. FIFO (First In First Out) USRP RIO Kintex-7. HD. code rate=1/3, constraint length=7 Convolutional. Burst Error Interleaver. QAM(Quadrature Amplitude Modulation), 16 QAM 64 QAM., 1,024-ponit IFFT(Inverse Fast Fourier Transform) CP(Cyclic Prefix). PAPR(Peak to Average Po- 그림 8. Fig. 8. Frame structure. 그림 9. Fig. 9. Tx block diagram. 448

5 을 이용한 5G 밀리미터파 LTE-TDD HD 비디오 스트리밍 시스템 설계 및 구현 USRP RIO SDR 수신기 블록도 그림 10. Fig. 10. Rx block diagram. 을 줄여 USRP RIO의 Tx RF 채널로 비디오 데이터 패킷을 전송한다. 수신기 소프트웨어의 구조 및 동작은 송신기의 역순이 며, 송신부와 마찬가지로 3GPP LTE 표준에 따라 구현되 었다. 진행되는 순서는 그림 10과 같다. 동기부는 PSS(Primary Synchronization Signal)와 SSS(Secondary Synchronization Signal)를 검출하여 동기화를 수행 한다. 첫 번째로 PSS를 검출해 슬롯 타이밍 정보를 얻고, 두 번째로 SSS를 통해서 프레임 타이밍 정보와 CP 길이 정보를 얻는다. 이후 CP 사이즈, 프레임 사이즈와 FFT 사이즈를 토대 로 CP를 제거한다. CFO(Carrier Frequency Offset) Correction을 수행하여 주파수 오차를 제거한 후 10 MHz 1,024point 사이즈로 FFT(Fast Fourier Transform)를 수행한다. 제로 패딩 제거 후 송신기에서 삽입한 참조 심볼을 이용 해 채널 추정을 수행한다. 채널 추정 이후 QAM 변조 방식에 따라 Demapper를 수 행하여 비트 스트림으로 변환하게 된다. 변환된 비트 스 트림은 Deinterleaver와 TBCC(Tail-Biting Convolutional Code) 채널 디코딩을 거쳐 비트 스트림으로 변환된다. 비트스트림은 스트링으로 변환되어 HD 비디오 데이터 를 복원하게 된다. 복원된 데이터는 LabVIEW 소프트웨 어에서 지정해준 UDP 포트로 전송되고, 미디어 플레이어 는 해당 포트로 데이터를 받아 HD 비디오를 스트리밍하 게 된다. 그림 9, 10에서 설계한 소프트웨어는 그림 11, 12와 같 이 구현되었다. 그림 11은 LabVIEW로 구현된 송신부 소 wer Ratio) [6] 송신부 컨트롤 패널 그림 11. LabVIEW Fig. 11. LabVIEW control pannel(tx). 수신부 컨트롤 패널 그림 12. LabVIEW Fig. 12. LabVIEW Control Pannel(Rx). 프트웨어이다. 실시간으로 재생하고 있는 HD 비디오를 LabVIEW 소프트웨어가 16 QAM으로 변조하여 전송하고 있는 모습이며, 그림 12는 수신부 소프트웨어로 실시간으 로 HD 비디오를 스트리밍하고 있는 모습이다. 특히 수신 부 소프트웨어는 상성도와 EVM(Error Vector Magnitude) 측정을 적용하여 시시각각 복조되는 상태를 확인할 수 있다. 2-4 실험 및 성능평가 대역의 밀리미터파 HD 비디오 송수신 시스템 을 그림 과 같이 실제 구현하여 검증을 수행하였다. 소 28 GHz

6 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 5, May 의 합성 결과 Logic utilization Used Available Utilization Total slices 17,641 63, % Slice registers 57, , % Slice LUTs 29, , % Block RAMs % DSP48s 302 1, % 표 1. USRP RIO 2942R FPGA Table 1. FPGA synthesis result of USRP RIO 2942R. 구현된 전체 시스템 그림 13. Fig. 13. Implemented overall system. 프트웨어는 Verilog와 LabVIEW를 이용하여 기술되었으 며, 성능평가는 수신기에서의 상성도, EVM 그리고 Keysight Technology의 N9962A FieldFox 마이크로웨이브(주 파수 대역 : 9 khz 50 GHz) 스펙트럼 분석기를 이용한 채널 파워 측정을 통해 검증하였다. 개발 프로그램으로 Xilinx ISE 14.7과 LabVIEW 2014 Serviece Pack 1 버전을 이용해 코딩하였다. Xilinx ISE 14.7을 이용해 Verilog로 LTE-TDD OFDM 시스템을 코딩 하고, LabVIEW로 UDP 스트리밍 시스템을 프로그래밍하 였다. Verilog로 작성한 LTE-TDD OFDM 시스템은 LabVIEW 소프트웨어로 최종 통합되어 USRP RIO NI2942R 의 Kintex-7 칩에 집적되었다. PC와 USRP RIO간의 원활 한 HD 비디오 데이터 송수신을 위하여 PC에 PCIe 4 카 드를 설치하고, MXI 케이블로 컴퓨터와 USRP RIO간 통 신을 하였다. 그 외에 USRP RIO와 28 GHz RF 송수신기, 4 8 안테나는 모두 SMA(Sub Miniature version A) 케이블 로 연결하였다. USRP RIO 드라이버는 15.0 버전을 사용 하였다. 해당 시스템에서 USRP RIO의 Kintx-7 칩에 FPGA로 합성한 결과는 표 1과 같다. LabVIEW FPGA 합성 프로그 램은 Xilinx Vivado 버전을 사용하여 컴파일하였으 며, 생성된 비트 파일은 USRP RIO의 Kintex-7 칩에 구동 하였다. 성능 검증 실험으로 그림 14와 같이 안테나를 배치하 여 측정된 값을 비교하였다. 밀리미터파는 직진성이 강해 450 실험환경 그림 14. Fig. 14. Field test environment. 빔 방사 각도 조절이 예민하여 점 대 점 고정통신방식을 취해야 하므로 정확한 성능 테스트를 위해 LOS(Line Of Sight) 환경에서 측정을 하였다. 실험환경은 연구실 내에 그림 15와 같이 장비를 배치 하고, 안테나를 거리별로 배치하여 측정하였다. 각각의 포인트는 P1(10 cm), P2(30 cm), P3(50 cm), P4(100 cm) 그 리고 P5(150 cm)의 5군데에서 성능 측정을 하고, 그 이상 의 거리에서는 HD 비디오 스트리밍이 정상적으로 송수 신되는지 확인하는 방식으로 실험을 진행하였다. 4 8 Tx 안테나의 송신출력은 4 dbm으로 측정되었다. 송신출력이 이와 같이 낮은 이유는 4 8 안테나는 능동 위 상 배열 안테나(Active Phased Array Antenna)로서 추후 현 재의 시스템에 파워 앰프가 추가될 것이기 때문이다. 따 라서 USRP RIO에서 너무 높은 파워로 신호를 송신한다 면 Saturation이 생길 수 있기 때문에 송신 출력이 낮은 것 이다. 그림 15와 16은 시스템의 성능을 측정한 값을 도식화 [7]

7 USRP RIO SDR 5G LTE-TDD HD (a) P1 (b) P5 (a) Rx constellation at P1 (b) Rx constellation at P5 그림 15. EVM Fig. 15. EVM performance per each point. 그림 16. Fig. 16. Channel power per each point.. 15 EVM, GHz 16 QAM 그림 QAM Fig QAM Rx constellation. 64 QAM. EVM 1 m, 2.14 dbc. 1 m EVM 1.39 dbc 16 QAM 64 QAM 0.75 dbc QAM 64 QAM point. 28 GHz. 19 HD. 16 QAM 64 QAM 7.35 m 3.56 m HD., 3 5 표 2. Table 2. Performance measurement result. Point EVM (dbc) 16 QAM 64 QAM Channel power (dbm) EVM (dbc) Channel power (dbm) P P P P P (a) P1 (b) P5 (a) Rx constellation at P1 (b) Rx constellation at P5 그림 QAM Fig QAM Rx constellation. 451

8 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 5, May GHz., 5G. References (a) 16 QAM HD (a) Rx HD video streaming of 16 QAM (b) 64 QAM HD (b) Rx HD video streaming of 64 QAM 그림 19. HD Fig. 19. HD video streaming... 결론 28 GHz LTE EVM, HD... [1],,,, "5G ",, 32 9(1), pp , [2] Dantong Liu, Lifeng Wang, Yue Chen, Maged Elkashlan, Kai-Kit Wong, Robert Schober, and Lajos Hanzo, "Use association in 5G networks: a survey and an outlook", IEEE Communications Surveys & Tutorials, issue 99, pp. 1-27, Jan [3],,,, " GHz ",, 26(10), pp , [4] NI USRP RIO page. [Online]. Available : ni.com [5] 3GPP spec series [Online]. Available : [6] Y. -C. Wang, J. -L. Wang, K. -C. Yi, and B. Tian, "PAPR reduction of OFDM signals with minimized EVM via semidefinite relaxation", IEEE Transactions on Vehicular Technology, vol. 60, issue 9, pp , Nov [7] T. Deepa, R. Kumar, "Performance of comparison metrics on M-QAM OFDM systems with high power amplifier", 2012 World Congress on Information and Communication Technologies, pp , Oct-Nov

9 USRP RIO SDR 5G LTE-TDD HD : ( ) : [ 주관심분야 ], : ( ) : ( ) : ( ) : LG RF Team : Chip Solution Center : Athena Semi : [ 주관심분야 ] CMOS, CM- OS, UWB, : ( ) : ( ) : : [ 주관심분야 ]., : ( ) : ( ) : ( ) : Stanford University : QCT 3GPP : [ 주관심분야 ],,, : ( ) : [ 주관심분야 ], UWB 453

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct ,,. 0.5 %.., cm mm FR4 (ε r =4.4)

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct ,,. 0.5 %.., cm mm FR4 (ε r =4.4) THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 799 804. http://dx.doi.org/10.5515/kjkiees.2018.29.10.799 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Method

More information

04 최진규.hwp

04 최진규.hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Aug.; 26(8), 710717. http://dx.doi.org/10.5515/kjkiees.2015.26.8.710 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) RF ESPAR

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 26(11),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 26(11), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Nov.; 26(11), 978 984. http://dx.doi.org/10.5515/kjkiees.2015.26.11.978 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Transceiver

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 29(2), IS

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 29(2), IS THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Feb.; 29(2), 93 98. http://dx.doi.org/10.5515/kjkiees.2018.29.2.93 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) UHF-HF

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 27(7),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 27(7), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Jul.; 27(7), 625634. http://dx.doi.org/10.5515/kjkiees.2016.27.7.625 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Near-Field

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Jun.; 276), 504511. http://dx.doi.org/10.5515/kjkiees.2016.27.6.504 ISSN 1226-3133 Print)ISSN 2288-226X Online) Near-Field

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jun.; 27(6), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Jun.; 27(6), 495 503. http://dx.doi.org/10.5515/kjkiees.2016.27.6.495 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Design

More information

2 : 2.4GHz (Junghoon Paik et al.: Medium to Long Range Wireless Video Transmission Scheme in 2.4GHz Band with Beamforming) (Regular Paper) 23 5, 2018

2 : 2.4GHz (Junghoon Paik et al.: Medium to Long Range Wireless Video Transmission Scheme in 2.4GHz Band with Beamforming) (Regular Paper) 23 5, 2018 2 : 2.4GHz (Junghoon Paik et al.: Medium to Long Range Wireless Video Transmission Scheme in 2.4GHz Band with Beamforming) (Regular Paper) 23 5, 2018 9 (JBE Vol. 23, No. 5, September 2018) https://doi.org/10.5909/jbe.2018.23.5.693

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 28(3),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 28(3), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Mar.; 28(3), 163 169. http://dx.doi.org/10.5515/kjkiees.2017.28.3.163 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) PCB

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 26(1),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 26(1), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Jan.; 26(1), 113118. http://dx.doi.org/10.5515/kjkiees.2015.26.1.113 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) A Retro-Directive

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 6, Jun Rate). STAP(Space-Time Adaptive Processing)., -

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 6, Jun Rate). STAP(Space-Time Adaptive Processing)., - THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Jun.; 29(6), 457463. http://dx.doi.org/10.5515/kjkiees.2018.29.6.457 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Sigma-Delta

More information

04 김영규.hwp

04 김영규.hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 214 Nov.; 25(11), 1121 1127. http://dx.doi.org/1.5515/kjkiees.214.25.11.1121 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Planar

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 26(11),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 26(11), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Nov.; 26(11), 985991. http://dx.doi.org/10.5515/kjkiees.2015.26.11.985 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 27(12),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 27(12), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Dec.; 27(12), 1036 1043. http://dx.doi.org/10.5515/kjkiees.2016.27.12.1036 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 30(9),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 30(9), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2019 Sep.; 30(9), 712 717. http://dx.doi.org/10.5515/kjkiees.2019.30.9.712 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) MOS

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 27(7),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jul.; 27(7), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 16 Jul.; 27(7), 64662. http://dx.doi.org/./kjkiees.16.27.7.646 ISSN 1226-3133 (Print)ISSN 2288-226 (Online) 2D Microwave Image

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 28(11),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 28(11), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Nov.; 28(11), 837 842. http://dx.doi.org/10.5515/kjkiees.2017.28.11.837 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) 8PSK-TCM

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 25(3),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 25(3), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Mar.; 25(3), 304310. http://dx.doi.org/10.5515/kjkiees.2014.25.3.304 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis

More information

. 서론,, [1]., PLL.,., SiGe, CMOS SiGe CMOS [2],[3].,,. CMOS,.. 동적주파수분할기동작조건분석 3, Miller injection-locked, static. injection-locked static [4]., 1/n 그림

. 서론,, [1]., PLL.,., SiGe, CMOS SiGe CMOS [2],[3].,,. CMOS,.. 동적주파수분할기동작조건분석 3, Miller injection-locked, static. injection-locked static [4]., 1/n 그림 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Feb.; 27(2), 170175. http://dx.doi.org/10.5515/kjkiees.2016.27.2.170 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Oct.; 27(10), 926 934. http://dx.doi.org/10.5515/kjkiees.2016.27.10.926 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Multi-Function

More information

05 목차(페이지 1,2).hwp

05 목차(페이지 1,2).hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Apr.; 25(4), 418 425. http://dx.doi.org/10.5515/kjkiees.2014.25.4.418 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Doppler

More information

<313920C0CCB1E2BFF82E687770>

<313920C0CCB1E2BFF82E687770> 韓 國 電 磁 波 學 會 論 文 誌 第 19 卷 第 8 號 2008 年 8 月 論 文 2008-19-8-19 K 대역 브릭형 능동 송수신 모듈의 설계 및 제작 A Design and Fabrication of the Brick Transmit/Receive Module for K Band 이 기 원 문 주 영 윤 상 원 Ki-Won Lee Ju-Young Moon

More information

8-VSB (Vestigial Sideband Modulation)., (Carrier Phase Offset, CPO) (Timing Frequency Offset),. VSB, 8-PAM(pulse amplitude modulation,, ) DC 1.25V, [2

8-VSB (Vestigial Sideband Modulation)., (Carrier Phase Offset, CPO) (Timing Frequency Offset),. VSB, 8-PAM(pulse amplitude modulation,, ) DC 1.25V, [2 VSB a), a) An Alternative Carrier Phase Independent Symbol Timing Offset Estimation Methods for VSB Receivers Sung Soo Shin a) and Joon Tae Kim a) VSB. VSB.,,., VSB,. Abstract In this paper, we propose

More information

24 GHz 1Tx 2Rx FMCW ADAS(Advanced Driver Assistance System).,,,. 24 GHz,, [1] [4]. 65-nm CMOS FMCW 24 GHz FMCW.. 송수신기설계 1 1Tx 2Rx FMCW (Local Oscillat

24 GHz 1Tx 2Rx FMCW ADAS(Advanced Driver Assistance System).,,,. 24 GHz,, [1] [4]. 65-nm CMOS FMCW 24 GHz FMCW.. 송수신기설계 1 1Tx 2Rx FMCW (Local Oscillat THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 758 765. http://dx.doi.org/10.5515/kjkiees.2018.29.10.758 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) 24

More information

RRH Class-J 5G [2].,. LTE 3G [3]. RRH, W-CDMA(Wideband Code Division Multiple Access), 3G, LTE. RRH RF, RF. 1 RRH, CPRI(Common Public Radio Interface)

RRH Class-J 5G [2].,. LTE 3G [3]. RRH, W-CDMA(Wideband Code Division Multiple Access), 3G, LTE. RRH RF, RF. 1 RRH, CPRI(Common Public Radio Interface) THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Mar.; 26(3), 276 282. http://dx.doi.org/10.5515/kjkiees.2015.26.3.276 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) RRH

More information

이도경, 최덕재 Dokyeong Lee, Deokjai Choi 1. 서론

이도경, 최덕재 Dokyeong Lee, Deokjai Choi 1. 서론 이도경, 최덕재 Dokyeong Lee, Deokjai Choi 1. 서론 2. 관련연구 2.1 MQTT 프로토콜 Fig. 1. Topic-based Publish/Subscribe Communication Model. Table 1. Delivery and Guarantee by MQTT QoS Level 2.1 MQTT-SN 프로토콜 Fig. 2. MQTT-SN

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 25(11),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Nov.; 25(11), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Nov.; 25(11), 11351141. http://dx.doi.org/10.5515/kjkiees.2014.25.11.1135 ISSN 1226-3133 (Print)ISSN 2288-226X (Online)

More information

05 목차(페이지 1,2).hwp

05 목차(페이지 1,2).hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Oct.; 25(10), 10771086. http://dx.doi.org/10.5515/kjkiees.2014.25.10.1077 ISSN 1226-3133 (Print)ISSN 2288-226X (Online)

More information

09권오설_ok.hwp

09권오설_ok.hwp (JBE Vol. 19, No. 5, September 2014) (Regular Paper) 19 5, 2014 9 (JBE Vol. 19, No. 5, September 2014) http://dx.doi.org/10.5909/jbe.2014.19.5.656 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) a) Reduction

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 26(10),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 26(10), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Sep.; 26(10), 876 884. http://dx.doi.org/10.5515/kjkiees.2015.26.10.876 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Design

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Apr.; 29(4),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Apr.; 29(4), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Apr.; 29(4), 308 315. http://dx.doi.org/10.5515/kjkiees.2018.29.4.308 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) LFM

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 26(10),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 26(10), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Sep.; 26(10), 907 913. http://dx.doi.org/10.5515/kjkiees.2015.26.10.907 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Prediction

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 30(3),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 30(3), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2019 Mar.; 30(3), 223 228. http://dx.doi.org/10.5515/kjkiees.2019.30.3.223 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Analysis

More information

인문사회과학기술융합학회

인문사회과학기술융합학회 Vol.5, No.5, October (2015), pp.471-479 http://dx.doi.org/10.14257/ajmahs.2015.10.50 스마트온실을 위한 가상 외부기상측정시스템 개발 한새론 1), 이재수 2), 홍영기 3), 김국환 4), 김성기 5), 김상철 6) Development of Virtual Ambient Weather Measurement

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA 논문 10-35-03-03 한국통신학회논문지 '10-03 Vol. 35 No. 3 원활한 채널 변경을 지원하는 효율적인 IPTV 채널 관리 알고리즘 준회원 주 현 철*, 정회원 송 황 준* Effective IPTV Channel Control Algorithm Supporting Smooth Channel Zapping HyunChul Joo* Associate

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 28(3),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 28(3), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 207 Mar.; 28(3), 7785. http://dx.doi.org/0.555/kjkiees.207.28.3.77 ISSN 226-333 (Print)ISSN 2288-226X (Online) Performance Comparison

More information

3 : FBMC/OQAM (YongJu Won et al.: A Study of Iterative Channel Estimation and Equalization Scheme of FBMC/OQAM in a Frequency Oversampling Domain) (Re

3 : FBMC/OQAM (YongJu Won et al.: A Study of Iterative Channel Estimation and Equalization Scheme of FBMC/OQAM in a Frequency Oversampling Domain) (Re (Regular Paper) 21 3, 2016 5 (JBE Vol. 21, No. 3, May 2016) http://dx.doi.org/10.5909/jbe.2016.21.3.391 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) FBMC/OQAM a), b), a), a) A Study of Iterative Channel

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 8, Aug [3]. ±90,.,,,, 5,,., 0.01, 0.016, 99 %... 선형간섭

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 27, no. 8, Aug [3]. ±90,.,,,, 5,,., 0.01, 0.016, 99 %... 선형간섭 THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Aug.; 27(8), 693700. http://dx.doi.org/10.5515/kjkiees.2016.27.8.693 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Design

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 9, Sep GHz 10 W Doherty. [4]. Doherty. Doherty, C

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 9, Sep GHz 10 W Doherty. [4]. Doherty. Doherty, C THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Sep.; 26(9), 783 789. http://dx.doi.org/10.5515/kjkiees.2015.26.9.783 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) GaN-HEMT

More information

04 박영주.hwp

04 박영주.hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 216 Mar.; 27(3), 253 26. http://dx.doi.org/1.5515/kjkiees.216.27.3.253 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) LPDA Design

More information

08김현휘_ok.hwp

08김현휘_ok.hwp (Regular Paper) 21 3, 2016 5 (JBE Vol. 21, No. 3, May 2016) http://dx.doi.org/10.5909/jbe.2016.21.3.369 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) a), a) An Audio Coding Technique Employing the Inter-channel

More information

, V2N(Vehicle to Nomadic Device) [3]., [4],[5]., V2V(Vehicle to Vehicle) V2I (Vehicle to Infrastructure) IEEE 82.11p WAVE (Wireless Access in Vehicula

, V2N(Vehicle to Nomadic Device) [3]., [4],[5]., V2V(Vehicle to Vehicle) V2I (Vehicle to Infrastructure) IEEE 82.11p WAVE (Wireless Access in Vehicula THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 215 Jul.; 26(7), 66 612. http://dx.doi.org/1.5515/kjkiees.215.26.7.66 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Dual-Band

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 26(1), IS

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 26(1), IS THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Jan.; 26(1), 54 62. http://dx.doi.org/10.5515/kjkiees.2015.26.1.54 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Design

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 26(5),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 26(5), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 May; 26(5), 435444. http://dx.doi.org/10.5515/kjkiees.2015.26.5.435 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) 77 GHz

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 3, Mar (NFC: non-foster Circuit).,. (non-foster match

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 26, no. 3, Mar (NFC: non-foster Circuit).,. (non-foster match THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Mar.; 26(3), 283 291. http://dx.doi.org/10.5515/kjkiees.2015.26.3.283 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Negative

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 26(3),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Mar.; 26(3), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 215 Mar.; 26(3), 248 256. http://dx.doi.org/1.5515/kjkiees.215.26.3.248 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Metal

More information

슬라이드 제목 없음

슬라이드 제목 없음 OFDM (Orthogonal Frequency Division Multiplexing) 서울대학교이동통신연구실 1 Contents Introduction Generation of subcarriers using the IFFT Guard time and cyclic extension Windowing Choice of OFDM parameters OFDM

More information

29 Ⅰ. 서론 물리학자들이 전파의 이론을 정립한 이후, 이를 기술적으로 실현함은 물론 적정 수준의 19세기 물리학자인 페러데이, 맥스웰, 헤르츠 등의 연구 결과로 인류는 전기장과 자기장의 변화 에 따른 전파를 만들어 낼 수 있게 되었고, 인류에 게 있어 없어서는 안되

29 Ⅰ. 서론 물리학자들이 전파의 이론을 정립한 이후, 이를 기술적으로 실현함은 물론 적정 수준의 19세기 물리학자인 페러데이, 맥스웰, 헤르츠 등의 연구 결과로 인류는 전기장과 자기장의 변화 에 따른 전파를 만들어 낼 수 있게 되었고, 인류에 게 있어 없어서는 안되 Journal of Communications & Radio Spectrum SPECIAL ISSUE 28 TREND REPORT 통신 및 비통신용 전파응용 기술 이슈 및 시사점 글 황태욱 경희대학교 연구교수 (031) 201-3254, twhwang@khu.ac.kr 주제어: 밀리미터파, 테라헤르츠파, 전파응용 기술, ISM 기기 전파자원의 부족문제에 대한

More information

11 함범철.hwp

11 함범철.hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2012 Aug.; 23(8), 958 966. http://dx.doi.org/10.5515/kjkiees.2012.23.8.958 ISSN 1226-3133 (Print) LTCC Bluetooth/WiFi A Bluetooth/WiFi

More information

°í¼®ÁÖ Ãâ·Â

°í¼®ÁÖ Ãâ·Â Performance Optimization of SCTP in Wireless Internet Environments The existing works on Stream Control Transmission Protocol (SCTP) was focused on the fixed network environment. However, the number of

More information

½Éº´È¿ Ãâ·Â

½Éº´È¿ Ãâ·Â Standard and Technology of Full-Dimension MINO Systems in LTE-Advances Pro Massive MIMO has been studied in academia foreseeing the capacity crunch in the coming years. Presently, industry has also started

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Oct.; 27(10), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Oct.; 27(10), 935 940. http://dx.doi.org/10.5515/kjkiees.2016.27.10.935 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Directed

More information

(JBE Vol. 21, No. 1, January 2016) (Regular Paper) 21 1, (JBE Vol. 21, No. 1, January 2016) ISSN 228

(JBE Vol. 21, No. 1, January 2016) (Regular Paper) 21 1, (JBE Vol. 21, No. 1, January 2016)   ISSN 228 (JBE Vol. 1, No. 1, January 016) (Regular Paper) 1 1, 016 1 (JBE Vol. 1, No. 1, January 016) http://dx.doi.org/10.5909/jbe.016.1.1.60 ISSN 87-9137 (Online) ISSN 16-7953 (Print) a), a) An Efficient Method

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 28(2),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 28(2), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2017 Feb.; 28(2), 129138. http://dx.doi.org/10.5515/kjkiees.2017.28.2.129 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) PT- Doppler

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 25(1), IS

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Jan.; 25(1), IS THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Jan.; 25(1), 47 52. http://dx.doi.org/10.5515/kjkiees.2014.25.1.47 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Circuit

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 27(5),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 27(5), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 May; 27(5), 454462. http://dx.doi.org/10.5515/kjkiees.2016.27.5.454 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Research

More information

CS.hwp

CS.hwp 보고서 2019-11 2019. 1. 3 CS(065770) IT H/W < 작성기관 : 한국기업데이터 > 보고서 ( 요약 ) 보고서 ( 전문 ) 기업현황산업분석기술분석주요이슈및전망 CS(065770) IT H/W 이 보고서는 자본시장 혁신을 위한 코스닥시장 활성화 방안 의 일환으로 코스닥 기업에 대한 투자정보 확충을 위해, 한국거래소와 한국예탁결제원의 후원을

More information

09È«¼®¿µ 5~152s

09È«¼®¿µ5~152s Korean Journal of Remote Sensing, Vol.23, No.2, 2007, pp.45~52 Measurement of Backscattering Coefficients of Rice Canopy Using a Ground Polarimetric Scatterometer System Suk-Young Hong*, Jin-Young Hong**,

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 27(9),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Sep.; 27(9), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Sep.; 27(9), 775 782. http://dx.doi.org/10.5515/kjkiees.2016.27.9.775 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) GPS

More information

Small-Cell 2.6 GHz Doherty 표 1. Silicon LDMOS FET Table 1. Comparison of silicon LDMOS FET and GaN- HEMT. Silicon LDMOS FET Bandgap 1.1 ev 3.4 ev 75 V

Small-Cell 2.6 GHz Doherty 표 1. Silicon LDMOS FET Table 1. Comparison of silicon LDMOS FET and GaN- HEMT. Silicon LDMOS FET Bandgap 1.1 ev 3.4 ev 75 V THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Feb.; 27(2), 108 114. http://dx.doi.org/10.5515/kjkiees.2016.27.2.108 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Small-Cell

More information

07 김상수.hwp

07 김상수.hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Dec.; 27(12), 1075 1083. http://dx.doi.org/10.5515/kjkiees.2016.27.12.1075 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)

More information

(Microsoft Word - GNU\272\270\260\355\274\255)

(Microsoft Word - GNU\272\270\260\355\274\255) GNU Radio 를이용한 AM Reeiver 구현 이봉준 2008-07-25 1. 연구목적 Software Radio 를이해하고 GNU Radio 와 Universal Software Radio Peripheral (USRP) 를이용한 AM Reeiver 를구현한다. 2. GNU Radio and USRP GNU Radio는 GNU General Publi

More information

., 3D HDTV. 3D HDTV,, 2 (TTA) [] 3D HDTV,,, /. (RAPA) 3DTV [2] 3DTV, 3DTV, DB(, / ), 3DTV. ATSC (Advanced Television Systems Committee) 8-VSB (8-Vesti

., 3D HDTV. 3D HDTV,, 2 (TTA) [] 3D HDTV,,, /. (RAPA) 3DTV [2] 3DTV, 3DTV, DB(, / ), 3DTV. ATSC (Advanced Television Systems Committee) 8-VSB (8-Vesti ATSC a), a) A Carrier Frequency Synchronization Scheme for modified ATSC Systems Young Gon Jeon a) and Joon Tae Kim a) 3D HDTV (3-Dimensional High Definition Television). 3D HDTV HDTV ATSC (Advanced Television

More information

CAN-fly Quick Manual

CAN-fly Quick Manual adc-171 Manual Ver.1.0 2011.07.01 www.adc.co.kr 2 contents Contents 1. adc-171(rn-171 Pack) 개요 2. RN-171 Feature 3. adc-171 Connector 4. adc-171 Dimension 5. Schematic 6. Bill Of Materials 7. References

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA 한국소음진동공학회 2015추계학술대회논문집년 Study of Noise Pattern and Psycho-acoustics Characteristic of Household Refrigerator * * ** ** Kyung-Soo Kong, Dae-Sik Shin, Weui-Bong Jeong, Tae-Hoon Kim and Se-Jin Ahn Key Words

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 26(2),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Feb.; 26(2), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 15 Feb.; (), 1. http://dx.doi.org/1.5515/kjkiees.15... ISSN 1-3133 (Print)ISSN -X (Online) An Analysis on Harmonic Effects of

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct , EBG. [4],[5],. double split ring resonator (D

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. vol. 29, no. 10, Oct , EBG. [4],[5],. double split ring resonator (D THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 739 744. http://dx.doi.org/10.5515/kjkiees.2018.29.10.739 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) DSRR

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA 박건수 *, 서태영 **, 김종욱 *** ". 요약 Abstract The induction melting furnace using electric generator has been introduced since 1920s, and it began to be widely applied to industrial applications due to increasing

More information

<333820B1E8C8AFBFEB2D5A6967626565B8A620C0CCBFEBC7D120BDC7BFDC20C0A7C4A1C3DFC1A42E687770>

<333820B1E8C8AFBFEB2D5A6967626565B8A620C0CCBFEBC7D120BDC7BFDC20C0A7C4A1C3DFC1A42E687770> Journal of the Korea Academia-Industrial cooperation Society Vol. 13, No. 1 pp. 306-310, 2012 http://dx.doi.org/10.5762/kais.2012.13.1.306 Zigbee를 이용한 실외 위치추정 시스템 구현 김환용 1*, 임순자 1 1 원광대학교 전자공학과 Implementation

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 26(12),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 26(12), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Dec.; 26(12), 1100 1107. http://dx.doi.org/10.5515/kjkiees.2015.26.12.1100 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 29(5),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE May; 29(5), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 May; 29(5), 375382. http://dx.doi.org/10.5515/kjkiees.2018.29.5.375 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) Analysis

More information

,, RFID,. ITU-R [7], IoT (Internet of Thing), (ultra reliable) (low latency). IoT ( ) , [1]., [8] 10 IoT.,. Ofcom [10] IoT/M2M, (utilities),,

,, RFID,. ITU-R [7], IoT (Internet of Thing), (ultra reliable) (low latency). IoT ( ) , [1]., [8] 10 IoT.,. Ofcom [10] IoT/M2M, (utilities),, THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Jul.; 27(7), 588598. http://dx.doi.org/10.5515/kjkiees.2016.27.7.588 ISSN 1226-3133 (Print)ISSN 2288-226X (Online) A Promoting

More information

03 장태헌.hwp

03 장태헌.hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2013 Aug.; 24(8), 772 780. http://dx.doi.org/10.5515/kjkiees.2013.24.8.772 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) HEMP

More information

歯A1.1함진호.ppt

歯A1.1함진호.ppt The Overall Architecture of Optical Internet ETRI ? ? Payload Header Header Recognition Processing, and Generation A 1 setup 1 1 C B 2 2 2 Delay line Synchronizer New Header D - : 20Km/sec, 1µsec200 A

More information

AV PDA Broadcastin g Centers Audio /PC Personal Mobile Interactive (, PDA,, DMB ),, ( 150km/h ) (PPV,, ) Personal Mobile Interactive Multimedia Broadcasting Services 6 MHz TV Channel Block A Block

More information

<35335FBCDBC7D1C1A42DB8E2B8AEBDBAC5CDC0C720C0FCB1E2C0FB20C6AFBCBA20BAD0BCAE2E687770>

<35335FBCDBC7D1C1A42DB8E2B8AEBDBAC5CDC0C720C0FCB1E2C0FB20C6AFBCBA20BAD0BCAE2E687770> Journal of the Korea Academia-Industrial cooperation Society Vol. 15, No. 2 pp. 1051-1058, 2014 http://dx.doi.org/10.5762/kais.2014.15.2.1051 멤리스터의 전기적 특성 분석을 위한 PSPICE 회로 해석 김부강 1, 박호종 2, 박용수 3, 송한정 1*

More information

(JBE Vol. 23, No. 6, November 2018) (Special Paper) 23 6, (JBE Vol. 23, No. 6, November 2018) ISSN 2

(JBE Vol. 23, No. 6, November 2018) (Special Paper) 23 6, (JBE Vol. 23, No. 6, November 2018)   ISSN 2 (JBE Vol. 23, No. 6, November 2018) (Special Paper) 23 6, 2018 11 (JBE Vol. 23, No. 6, November 2018) https://doi.org/10.5909/jbe.2018.23.6.790 ISSN 2287-9137 (Online) ISSN 1226-7953 (Print) ATSC 3.0 UHD

More information

07 최운성.hwp

07 최운성.hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2013 Nov.; 24(11), 1081 1090. http://dx.doi.org/10.5515/kjkiees.2013.24.11.1081 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)

More information

05 목차(페이지 1,2).hwp

05 목차(페이지 1,2).hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2014 Sep.; 25(9), 944 951. http://dx.doi.org/10.5515/kjkiees.2014.25.9.944 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) A Study

More information

,.. 2, , 3.. 본론 2-1 가상잡음신호원생성원리, [8].,. 1.,,. 4 km (13.3 μs).,. 2 (PN code: Pseudo Noise co- 그림 2. Fig. 2. Pseudo noise code. de). (LFSR: Line

,.. 2, , 3.. 본론 2-1 가상잡음신호원생성원리, [8].,. 1.,,. 4 km (13.3 μs).,. 2 (PN code: Pseudo Noise co- 그림 2. Fig. 2. Pseudo noise code. de). (LFSR: Line THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Jun; 26(6), 546 554. http://dx.doi.org/10.5515/kjkiees.2015.26.6.546 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Proof-of-Concept

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 26(12),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Dec.; 26(12), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2015 Dec.; 26(12), 1044 1049. http://dx.doi.org/10.5515/kjkiees.2015.26.12.1044 ISSN 1226-3133 (Print) ISSN 2288-226X (Online)

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Aug.; 27(8),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Aug.; 27(8), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2016 Aug.; 27(8), 72 734. http://dx.doi.org/10.1/kjkiees.2016.27.8.72 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) FBMC UFMC

More information

박선영무선충전-내지

박선영무선충전-내지 2013 Wireless Charge and NFC Technology Trend and Market Analysis 05 13 19 29 35 45 55 63 67 06 07 08 09 10 11 14 15 16 17 20 21 22 23 24 25 26 27 28 29 30 31 32 33 36 37 38 39 40

More information

10 이지훈KICS2015-03-068.hwp

10 이지훈KICS2015-03-068.hwp 논문 15-40-05-10 The Journal of Korean Institute of Communications and Information Sciences '15-05 Vol.40 No.05 http://dx.doi.org/10.7840/kics.2015.40.5.851 가로등 인프라를 활용한 안전한 스마트 방범 시스템 차 정 화, 이 주 용 *, 이

More information

/ TV 80 () DAB 2001 2002 2003 2004 2005 2010 Analog/Digital CATV Services EPG TV ( 60 ) TV ( Basic, Tier, Premiums 60 ) VOD Services Movies In Demand ( 20 ) Education N- VOD (24 ) Digital Music

More information

<353420B1C7B9CCB6F52DC1F5B0ADC7F6BDC7C0BB20C0CCBFEBC7D120BEC6B5BFB1B3C0B0C7C1B7CEB1D7B7A52E687770>

<353420B1C7B9CCB6F52DC1F5B0ADC7F6BDC7C0BB20C0CCBFEBC7D120BEC6B5BFB1B3C0B0C7C1B7CEB1D7B7A52E687770> Journal of the Korea Academia-Industrial cooperation Society Vol. 13, No. 2 pp. 866-871, 2012 http://dx.doi.org/10.5762/kais.2012.13.2.866 증강현실을 이용한 아동교육프로그램 모델제안 권미란 1*, 김정일 2 1 나사렛대학교 아동학과, 2 한세대학교 e-비즈니스학과

More information

그림 2. 5G 연구 단체 현황 앞으로 다가올 미래에는 고품질 멀 티미디어 서비스의 본격화, IoT 서 비스 확산 등의 변화로 인해 기하 급수적인 무선 데이터 트래픽 발생 및 스마트 기기가 폭발적으로 증대 할 것으로 예상된다 앞으로 다가올 미래에는 고품질 멀티미디어 서

그림 2. 5G 연구 단체 현황 앞으로 다가올 미래에는 고품질 멀 티미디어 서비스의 본격화, IoT 서 비스 확산 등의 변화로 인해 기하 급수적인 무선 데이터 트래픽 발생 및 스마트 기기가 폭발적으로 증대 할 것으로 예상된다 앞으로 다가올 미래에는 고품질 멀티미디어 서 이동통신기술 5G 이동통신기술 발전방향 새롭게 펼쳐질 미래의 이동통신 세상, 무엇이 달라지는가? 김문홍, 박종한, 나민수, 조성호 SK Telecom 5G Tech Lab 요 약 본고에서는 다가올 미래 5G 이동 통신의 기술 동향, 핵심 기술 및 네트워크 구조변화에 대해서 알아본다. Ⅰ. 서 론 46 과거 2G부터 3G까지의 이동통신은 음성 위주의 서비스 및

More information

¼º¿øÁø Ãâ·Â-1

¼º¿øÁø Ãâ·Â-1 Bandwidth Efficiency Analysis for Cooperative Transmission Methods of Downlink Signals using Distributed Antennas In this paper, the performance of cooperative transmission methods for downlink transmission

More information

<3031B0ADB9CEB1B82E687770>

<3031B0ADB9CEB1B82E687770> ISSN 1598-0170 (Print) ISSN 2287-1136 (Online) http://www.jksii.or.kr 다채널 멀티미디어 전송용 임베디드 Audio Video Bridging 플랫폼 설계 및 구현 Design and Implementation of an Embedded Audio Video Bridging Platform for Multichannel

More information

휴대용 기기 분야 가정용 영상 기기 분야 휴대 전화 USB, FireWire 등 PC PC TV DVD/Blu-ray 플레이어 게임 콘솔 휴대 전화 휴대전화, PMP 등 휴대용 기기 간 대용량 데이터 무선 전송 캠코더 Component, Display Port, DVI

휴대용 기기 분야 가정용 영상 기기 분야 휴대 전화 USB, FireWire 등 PC PC TV DVD/Blu-ray 플레이어 게임 콘솔 휴대 전화 휴대전화, PMP 등 휴대용 기기 간 대용량 데이터 무선 전송 캠코더 Component, Display Port, DVI 표준 기술동향 60GHz 주파수 대역 기반 밀리미터파 무선전송기술 표준화 동향 홍승은 ETRI 무선통신연구부 초고속무선통신연구팀 선임연구원 이우용 ETRI 무선통신연구부 초고속무선통신연구팀 팀장 정현규 ETRI 무선통신연구부 부장 1. 머리말 제공할 수 있다. 또한 저전력 구현을 통해 스마트폰과 같은 휴대용 장치에도 탑재되어 장치 간 대용량 무선 통신에 사용되는

More information

3 : ATSC 3.0 (Jeongchang Kim et al.: Study on Synchronization Using Bootstrap Signals for ATSC 3.0 Systems) (Special Paper) 21 6, (JBE Vol. 21

3 : ATSC 3.0 (Jeongchang Kim et al.: Study on Synchronization Using Bootstrap Signals for ATSC 3.0 Systems) (Special Paper) 21 6, (JBE Vol. 21 3: ATSC 3.0 (Jeongchang Kim et al.: Study on Synchronization Using Bootstrap Signals for ATSC 3.0 Systems) (Special Paper) 21 6, 2016 11 (JBE Vol. 21, No. 6, November 2016) http://dx.doi.org/10.5909/jbe.2016.21.6.899

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA The e-business Studies Volume 17, Number 6, December, 30, 2016:275~289 Received: 2016/12/02, Accepted: 2016/12/22 Revised: 2016/12/20, Published: 2016/12/30 [ABSTRACT] SNS is used in various fields. Although

More information

DBPIA-NURIMEDIA

DBPIA-NURIMEDIA The e-business Studies Volume 17, Number 4, August, 30, 2016:319~332 Received: 2016/07/28, Accepted: 2016/08/28 Revised: 2016/08/27, Published: 2016/08/30 [ABSTRACT] This paper examined what determina

More information

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Apr.; 29(4),

THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE Apr.; 29(4), THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Apr.; 29(4), 299 307. http://dx.doi.org/10.5515/kjkiees.2018.29.4.299 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) Design

More information

Microsoft Word - SRA-Series Manual.doc

Microsoft Word - SRA-Series Manual.doc 사 용 설 명 서 SRA Series Professional Power Amplifier MODEL No : SRA-500, SRA-900, SRA-1300 차 례 차 례 ---------------------------------------------------------------------- 2 안전지침 / 주의사항 -----------------------------------------------------------

More information

PCB ACF 77 GHz. X,,.,. (dip brazing), (diffusion bonding), (electroforming),, [1],[2].. PCB(Printed Circuit Board), (anisotropic conductive film: ACF)

PCB ACF 77 GHz. X,,.,. (dip brazing), (diffusion bonding), (electroforming),, [1],[2].. PCB(Printed Circuit Board), (anisotropic conductive film: ACF) THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2018 Oct.; 29(10), 752 757. http://dx.doi.org/10.5515/kjkiees.2018.29.10.752 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) PCB

More information

디지털포렌식학회 논문양식

디지털포렌식학회 논문양식 ISSN : 1976-5304 http://www.kdfs.or.kr Virtual Online Game(VOG) 환경에서의 디지털 증거수집 방법 연구 이 흥 복, 정 관 모, 김 선 영 * 대전지방경찰청 Evidence Collection Process According to the Way VOG Configuration Heung-Bok Lee, Kwan-Mo

More information

제 3 편

제 3 편 제 3 편 미약무선기기 (3 미터 ) 무선조정기 (500 미터 ) 소출력무선기기 코드리스전화기 데이터전송용 무선호출용 특정소출력무선기기 무선데이터통신및무선 LAN 용 무선마이크용 무선조정및안전시스템용 시각장애인용 단거리전용통신용 1000 100 10 60GHz ANSIBLE 5GHz PAN/LAN Convergence HIPERLAN/2 802.11a

More information

09 남형기.hwp

09 남형기.hwp THE JOURNAL OF KOREAN INSTITUTE OF ELECTROMAGNETIC ENGINEERING AND SCIENCE. 2013 Sep.; 24(9), 936 943. http://dx.doi.org/10.5515/kjkiees.2013.24.9.936 ISSN 1226-3133 (Print) ISSN 2288-226X (Online) 77

More information

14.531~539(08-037).fm

14.531~539(08-037).fm G Journal of the Korea Concrete Institute Vol. 20, No. 4, pp. 531~539, August, 2008 š x y w m š gj p { sƒ z 1) * 1) w w Evaluation of Flexural Strength for Normal and High Strength Concrete with Hooked

More information