빔 공간 MIMO 통신시스템에서 고레벨 변조 설계와 평가

Abstract

ESPAR(Electronically Steerable Parasitic Array Radiator) antenna is the technique for overcoming the problems of space limitation and energy efficiency due to the multiple RF-chain. Conventional MIMO system with multiple antenna requires a large number of RF-chain for transmitting the multiple data because it transmits the data in proportion to the number of antenna. Beamspace MIMO system using the ESPAR antenna which has single RF-chain was proposed for solving the problems caused by using the multiple antenna and RF-chain. In this paper, therefore we propose 2x2 beamspace MIMO system using the 16, 64-QAM modulation and evaluate the performance of this system to reveal that it is possible that beamspace MIMO system can use not only PSK modulation but also QAM modulation. We confirm that QAM symbol can be generated by adjusting reactance of parasitic elements and making reactance set and also we confirm that performance of beamspace MIMO system is similar to the conventional MIMO system by transmitting the QAM symbol made by reactance set through the simulation. 논문 14-39A-05-02 The Journal of Korea Information and Communications Society '14-05 Vol.39A No.05 http://dx.doi.org/10.7840/kics.2014.39A.5.220 220 ※ 이 논문은 2013년도 충북대학교 학술연구지원사업의 연구비 지원에 의하여 연구되었습니다. First Author : Chungbuk National University Department of Electronic Engineering, willfriends7@gmail.com, 학생회원 ° Corresponding Author : Chungbuk National University Department of Electronic Engineering, ecomm@cbnu.ac.kr, 정회원 논문번호 : KICS2013-12-526, Received December 10, 2013; Revised April 16, 2014; Accepted May 7, 2014 논문 / 빔 공간 MIMO 통신시스템에서 고레벨 변조 설계와 평가