A Robust Linear Precoding with Channel Prediction

doi:10.13190/jbupt.200904.117.wangxzh

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2009, Vol. 32 ›› Issue (4): 117-121.doi: 10.13190/jbupt.200904.117.wangxzh

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A Robust Linear Precoding with Channel Prediction

Received:2008-12-03 Revised:2009-04-28 Online:2009-08-28 Published:2009-08-28

Abstract

Abstract:

To eliminate effects of the feedback delay and mobile velocity in broadcast channel, the channel statistics and outdated channel information is used to estimate the current channel state information at transmitter (CSIT) jointly. Based on the obtained imperfect CSIT, a robust linear zero forcing (ZF) precoding is proposed. Simulation shows the performance of robust method is preferable. Furthermore, the relationship between system performance and feedback delay or mobile speed is presented.

Key words: multi-user multi input multi output system, channel state information at transmitter, channel estimation, linear precoding

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A Robust Linear Precoding with Channel Prediction

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