Double Codebook Estimation and Feedback with Outdated CSI

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• 作者：Dan Wang ; Yu Liu ; Yong Liao
• 关键词：Double codebook ; Beamforming ; TD ; LTE ; CSI ; Prediction
• 刊名：Wireless Personal Communications
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：91
• 期：3
• 页码：1419-1433
• 全文大小：
• 刊物类别：Engineering
• 刊物主题：Communications Engineering, Networks; Signal,Image and Speech Processing; Computer Communication Networks;
• 出版者：Springer US
• ISSN：1572-834X
• 卷排序：91

文摘

Due to the time-variant channel, outdated channel state information (CSI) largely reduce the performance of double codebook beamforming system. This paper studies the two codebooks independently and proposes an adaptive feedback period adjustment Strategy for long-term codebook and a prediction estimation algorithm for short-term codebook respectively. The former dynamically adjusts feedback period so as to improve the feedback timeliness and uplink feedback resource utilization. The later adopts improved Kalman prediction algorithm to predict CSI. Finally simulation results shows that the proposed schemes can effectively improve the performance of double codebook estimation with outdated CSI.