Linear precoding for MIMO wireless systems in spatially correlated fading channels공간적 상관 페이딩 채널에서의 다중 입출력 무선 시스템을 위한 선형 전부후화 기법

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In this thesis, we introduce the performance degradation due to the correlations of the transmit antennas for MIMO systems. In order to resolve this problem, the feedback information at the transmitter can be employed. We first estimate the channel covariance matrix, and then send this matrix back to the transmitter and apply the specific linear precoder which is known at the receiver as well. Some papers have suggested the linear precoding for the space-time block codes and the spatial multiplexing, but they required the high complexity for implementing. Therefore, we will propose a linear precoder which can improve the performance for STBC (Space Time Block Codes) and spatial multiplexing respectively. In case of STBC, we formulate the closed-form linear precoder for two transmit antennas system. And we propose also the sub-optimal closed-form linear precoder for spatial multiplexing. The main contribution is that we developed very simple and practical precoder for spatial multiplexing. Simulation results show that the proposed linear precoder can achieve the performance very close to the optimal linear precoder which is hard to implement practically.
Advisors
Park, Dong-Joresearcher박동조researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2006
Identifier
260074/325007  / 020053138
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2006.8, [ vii, 71 p. ]

Keywords

MIMO; linear precoding; spatial multiplexing; 공간 다중화; 다중 입출력; 선형 전부호화

URI
http://hdl.handle.net/10203/38420
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=260074&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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