A New Scheme on Precoding Codebook for TD-LTE-Advanced Systems

doi:10.13190/j.jbupt.2014.05.010

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2014, Vol. 37 ›› Issue (5): 45-49.doi: 10.13190/j.jbupt.2014.05.010

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A New Scheme on Precoding Codebook for TD-LTE-Advanced Systems

LIU Jian-fei, XU Qiang, ZENG Xiang-ye, WANG Meng-jun

1. School of Information Engineering, Hebei University of Technology, Tianjin 300401, China;
2. Tianjin Key Laboratory of Electronic Material and Devices, Tianjin 300401, China

Received:2013-12-06 Online:2014-10-28 Published:2014-11-07

Abstract

Abstract:

A new 8-antenna double codebook design scheme was proposed to improve TD-LTE-Advanced system's spectrum efficiency. Therein, the codebooks for differently layer number were constructed according to full rank matrix provided in Rel-8 protocol or discrete Fourier transform matrix combining with cyclic delay diversity. Analysis dedicates the new codebooks have larger intervals in codewords comparing with the 8-antenna double codebook in Rel-10 protocol. Simulation shows that the proposed method can obtain higher gain at least 2 dB for 8-transmitting and 2-receiving antennas and 2 layers; while the new codewords can increase spectral efficiency more than 15% compared with existing codebooks when signal to noise ratio is 5 dB.

Key words: TD-LTE-advanced, precoding, double codebook, spectral efficiency

CLC Number:

TN911.22

LIU Jian-fei, XU Qiang, ZENG Xiang-ye, WANG Meng-jun. A New Scheme on Precoding Codebook for TD-LTE-Advanced Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2014, 37(5): 45-49.

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A New Scheme on Precoding Codebook for TD-LTE-Advanced Systems

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