Adaptive beam tracking for interference alignment in time-varying mimo interference channels: Conjugate gradient approach시변 다중 입력 다중 출력 간섭 채널 환경하에서 간섭 정렬을 위한 적응적 빔 추정법

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In this thesis, a new way of beam design for interference alignment(IA) in time-varying multiuser multi-input and multi-output(MIMO) interference channels is proposed. In the past work, the linear formulation approach for interference alignment is proposed. Based on this approach, this thesis presents an adaptive algorithm for interference-aligning beam tracking in time-varying MIMO interference channels. This algorithm contains two main parts. The first one is constructing the channel information matrix with dummy variables which is already proposed in [1]. The other one is constructing beamforming vector for IA with conjugate gradient approach. It will be shown that obtaining the interference-aligning beam vector is equivalent to minimizing a certain Rayleigh quotient. With numerical results, stability of the proposed algorithm is shown in static channel case. Also the sum rate and the complexity of this algorithm is shown. By comparing with other methods, this thesis asserts that the proposed algorithm is more practical and especially more powerful in terms of the complexity than other methods.
Advisors
Sung, Young-Chulresearcher성영철researcher
Description
한국과학기술원 : 전기 및 전자공학과,
Publisher
한국과학기술원
Issue Date
2011
Identifier
467823/325007  / 020093410
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기 및 전자공학과, 2011.2, [ vii, 55 p. ]

Keywords

간섭 정렬; 적응 알고리즘; 켤레 구배법; Interference alignment; Adaptive algorithm; Conjugate gradient; Least squares; 최소 자승

URI
http://hdl.handle.net/10203/180788
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=467823&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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