Optimum design of Cayley differential unitary space-time codes based on union bound

被引：0
|
作者：
Wang, J. [1 ]
Wang, X.
机构：
[1] Qualcomm Inc, San Diego, CA 92121 USA
[2] Columbia Univ, Dept Elect Engn, New York, NY 12007 USA
来源：
IEE PROCEEDINGS-COMMUNICATIONS | 2006年 / 153卷 / 06期
关键词：
D O I：
10.1049/ip-com:20050567
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The Cayley differential (CD) codes constitute a systematic way to construct differential unitary space-time codes for noncoherent MIMO communications. The present authors propose designing CD codes by minimising the union bound based on the exact pairwise error probability (PEP). The gradient descent method is employed to numerically search the optimum dispersion matrices. They search the optimum CD codes for a particular scenario taking into account the number of transmit and receive antennas and the operating SNR. Simulation results show that codes optimised by the new criterion generally outperform the CD codes designed by maximising the expected distance between codeword pairs and the Cayley TAST codes that satisfy the full rank criterion. The new CD codes also enjoy better or comparable performance over other group-based or non-group codes.
引用
收藏
页码：856 / 864
页数：9
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