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A Downlink Beamforming Method with Phase Reference to Common Pilot Channel in Cellular Systems  

Joonsung, Lee (Dept. of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea)
Chungyong, Lee (Dept. of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.41, no.10, 2004 , pp. 53-59 More about this Journal
Abstract
A new downlink beamforming method is proposed for coherent detection of Cellular systems with BPSK modulation where there exists only common pilot channel. To solve phase mismatch between traffic and pilot signals at desired mobile and to reduce interference to other mobiles, the proposed downlink beamforming method considers a cost function of signal to interference ratio criteria and gives a solution for the cost function. The computer simulation showed that the proposed method can solve the phase mismatch problem and give improved BER performance in time-varying channels.
Keywords
Coherent detection; downlink beamforming; pilot signal; traffic signal; phase mismatch; SIR criteria;
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