Performance Analysis of Fixed-Gain Amplify-and-Forward Relaying With MRC
Performance Analysis of Fixed-Gain Amplify-and-Forward Relaying With MRC
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DOI：
10.1109/tvt.2010.2040755
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发表时间：
2010-01
影响因子：
6.8
通讯作者：
N. H. Vien;Ha H. Nguyen
中科院分区：
文献类型：
--
作者：
N. H. Vien;Ha H. Nguyen
中继传输由于可以利用单天线终端提供空间分集而受到广泛关注。研究了Nakagami-m衰落信道下固定增益放大转发（AF）中继的多中继系统的性能。对于一个有K个中继的系统，当在目的端采用最大比合并时，得到了平均误符号概率（SEP）的一个严格上界。基于得到的界，最大分集阶m（K + 1），其中m是衰落参数，示出。此外，功率分配（PA）的问题，以最小化SEP上界进行了研究。数值结果表明，在各种信道条件下，所提出的功率放大器提供了显着的增益超过相等的功率放大器（EPA）。
Relay transmission has recently attracted much attention since it can offer spatial diversity with single antenna terminals. This paper addresses the performance of a multiple-relay system with fixed-gain amplify-and-forward (AF) relaying in Nakagami-m fading. A tight upper bound on the average symbol error probability (SEP) is obtained for a system with K relays and when the maximal ratio combining (MRC) is used at the destination. Based on the obtained bound, a maximum diversity order of m(K + 1), where m is the fading parameter, is shown. Moreover, the problem of power allocation (PA) to minimize the SEP upper bound is investigated. Numerical results illustrate significant gains provided by the proposed PA over equal PA (EPA) under various channel conditions.