(A) MIMO antenna structure which combines transmit beamforming and spatial multiplexing = 전송 빔형성과 공간 다중화를 결합한 다중 입출력 안테나 구조

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We propose new channel-based or covariance-based closed-loop space-time signal processing schemes that combines transmit beamforming and spatial multiplexing in Rayleigh frequency-flat fading channel. We assume that the number of transmit antennas is greater than the number of receive antennas. To implement the proposed schemes, we use the following three maximization criterions: signal-to-noise ratio (SNR) maximization criterion, mutual information maximization criterion, and signal-to-interference-plus-noise ratio (SINR) maximization criterion. The proposed schemes achieve the multiplexing gain by spatial multiplexing and the antenna gain by beamforming. The achievable SNR and mutual information are shown according to each criterion. Bit error rate (BER) with ML (Maximum Likelihood) and MMSE (Minimum Mean-Squared Error) nulling and cancelling detection algorithm are given for spatial multiplexing, TAA (Transmit Antenna Array) beamforming, double-STTD (Space-Time Transmit Diversity) or D-STTD, and proposed schemes in Rayleigh frequency-flat fading channel with Monte-Carlo simulation. We show that the proposed schemes have lower BER than the other schemes. We show that the channel-based scheme is adaptive to slowly varying channel environment and covariance-based scheme is adaptive to fast varying channel environment.
Advisors
Chun, Joo-Hwanresearcher전주환researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2004
Identifier
238415/325007  / 020023131
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2004.2, [ v, 69 p. ]

Keywords

TAA BEAMFORMING; SPATIAL MULTPLEXING; 공간 다중화; TAA 빔형성

URI
http://hdl.handle.net/10203/37738
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=238415&flag=dissertation
Appears in Collection
EE-Theses_Master(석사논문)
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