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Hybrid Beamformer of CDMA Reverse Link in the Correlated SIMO Channel  

최영관 (연세대학교 전기전자공학과)
김동구 (연세대학교 전기전자공학과)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.41, no.11, 2004 , pp. 81-86 More about this Journal
Abstract
Hybrid beamformer composed of Direction-of-Arrival (DOA) based scheme followed by Maximal Ratio Combining (MRC) is proposed to overcome the degradation due to inaccurate channel estimation caused by insufficient pilot power, which happens in conventional Single-Input Multiple-Output (SIMO) Code Division Multiple Access (CDMA) reverse link. The proposed scheme could provide more accurate channel estimation and interference reduction at the expense of diversity gam in the spatially correlated SIMO channel. As a result, hybrid scheme outperforms conventional MRC beamformer for six or more antennas in the channel environment, in which Angle-of-Spread (AOS) is within 30$^{\circ}$.
Keywords
CDMA; SIMO; Hybrid beamformer; MRC beamformer; DOA based beamformer;
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