Optimal precoder for amplify-and-forward half-duplex relay system

被引：22
|
作者：
Ding, Yanwu [1 ]
Zhang, Jian-Kang [1 ]
Wong, Kon Max [1 ]
机构：
[1] McMaster Univ, Dept Elect & Comp Engn, Hamilton, ON, Canada
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2008年 / 7卷 / 08期
关键词：
relay system; amplify-and-forward (AF); ergodic channel capacity; pairwise error probability; diversity gain function; precoder; Farey sequence;
D O I：
10.1109/TWC.2008.070226
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：
In this paper, an optimal unitary precoder is designed for an amplify-and-forward (AF) half-duplex relay system to obtain the maximum coding gain while the original ergodic channel capacity for the relay system is kept unchanged. A closed-form design is derived for Quadrature Amplitude Modulation (QAM) signals by employing the properties of Farey sequence in number theory. Simulation results indicate that the proposed design greatly improves the bit error rate (BER) performance for-the relay system.
引用
收藏
页码：2890 / 2895
页数：6
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