Diversity Analysis of Relay Selection Schemes for Two-Way Wireless Relay Networks
Diversity Analysis of Relay Selection Schemes for Two-Way Wireless Relay Networks
复制标题
DOI：
10.1007/s11277-009-9911-0
复制
发表时间：
2011-07
影响因子：
2.2
通讯作者：
Ha X. Nguyen;Ha H. Nguyen;T. Le-Ngoc
中科院分区：
文献类型：
--
作者：
Ha X. Nguyen;Ha H. Nguyen;T. Le-Ngoc
单向无线中继网络由于其在衰落无线环境中提供空间分集的能力而受到广泛关注。此外，执行单中继选择是一个非常有吸引力的方法，由于其成本有效的实现和上级性能。然而，具有半双工信令的单向中继网络遭受频谱效率损失。为了克服这样的缺点，双向无线中继网络已被提出，这些也是本文所考虑的网络。本文分析了各种中继选择方案的分集阶数，包括最佳中继选择、最佳差信道选择和最大谐波均值选择。分析了放大转发协议以及两步和三步传输过程。特别地，在R中继无线网络中，分别采用两步和三步方法，可以实现RandR + 1的全分集阶数.数值和模拟结果验证了我们的分析。
One-way wireless relay networks have recently received a lot of attention due to their ability to provide spatial diversity in fading wireless environment. Moreover, performing single-relay selection is a very attractive method due to its cost effective implementation and superior performance. However, one-way relay networks with the half-duplex signalling suffer from a spectral efficiency loss. To overcome such a drawback, two-way wireless relay networks have been proposed and these are also the networks considered in this paper. The paper analyzes the diversity orders of various relay selection schemes, including the best-relay selection, best-worse-channel selection, and maximum-harmonic-mean selection. The analysis is done for the amplify-and-forward protocol and under the two-step and three-step transmission procedures. In particular, it is shown that full diversity orders ofRandR+ 1 can be achieved in aR-relay wireless network with the two-step and three-step procedures, respectively. Numerical and simulation results are provided to verify our analysis.