Zero-forcing beamformer design in MISO broadcast channel based on k-regularity = MISO 브로드캐스트 채널에서의 k-regularity를 기반으로 하는 제로 포싱 빔 형성법

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In this thesis, we consider zero-forcing beamformer design in multi-input single-output (MISO) broadcast channel based on k-regularity. k-regularity (or k-regular structure) is a new beamformer design paradigm for massivemulti-inputmulti-output (MIMO) systems proposed by Lee et al. [1]. In k-regular beamforming structure, each data stream is assigned to k out of N available transmit antennas. Thus, each data stream is multiplied by only k complex gains instead of N before transmission. Two zero-forcing beam design problems under k-regular structure are considered. First, we tackle whether zero-forcing beamforming is feasible with k-regular structure in MISO broadcast channel. Then, the problem of how to determine the optimal position of k transmit antennas for each data stream is considered. The second problem can be solved by the combinational approach (bruteforce search), but it will incur intractable computational complexity. Two zero-forcing beam design algorithms under k-regularity based on successive elimination strategy are proposed to reduce the computational burden. The proposed algorithms are shown to yeild almost the same performance to that which can be obtained by the combinational approach while having much smaller computation complexity. Moreover, it is shown that proposed algorithms achieve superior performance than random selection algorithm.
Advisors
Sung, Young-Chulresearcher성영철
Description
한국과학기술원 : 전기및전자공학과,
Publisher
한국과학기술원
Issue Date
2013
Identifier
513285/325007  / 020113281
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학과, 2013.2, [ iii, 32 p. ]

Keywords

MISO broadcast channel; k-regularity; Massive MIMO; 다중 입력 단일 출력 브로드캐스트 채널; 제로 포싱; 거대 배열 안테나 기술; Zero-forcing

URI
http://hdl.handle.net/10203/181025
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=513285&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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