Cooperative spectrum sharing systems with relay selection in the presence of multiple primary receivers
Cooperative spectrum sharing systems with relay selection in the presence of multiple primary receivers
复制标题
DOI：
10.1049/iet-com.2013.0575
复制
发表时间：
2014-03
期刊：
影响因子：
--
通讯作者：
F. R. V. Guimarães;D. B. D. Costa-D.-B.-D.-Costa-34825558;M. Benjillali;T. Tsiftsis;G. Karagiannidis
中科院分区：
文献类型：
--
作者：
F. R. V. Guimarães;D. B. D. Costa-D.-B.-D.-Costa-34825558;M. Benjillali;T. Tsiftsis;G. Karagiannidis
在这项研究中，中断性能的多中继合作网络中的频谱共享环境进行了分析。聚焦于次级通信过程，在通信过程之前执行中继选择过程，其中所选择的中继是使瞬时端到端信噪比（SNR）最大化并且同时满足由初级接收器施加的功率限制的中继。次要目的地采用选择组合策略，选择具有最高瞬时SNR的最佳路径（直接链路或中继链路）。两种中继协议被认为是：解码和转发和放大和转发。对于前者，一个精确的封闭形式的表达式中断概率（OP）的推导，而对于后者的OP的精确近似。然后，进行了渐近分析，并揭示了系统的分集阶数为N + 1的中继协议，与N表示的中继的数量。蒙特卡洛模拟评估作者的结果的准确性。
In this study, the outage performance of a multi-relay cooperative network operating in a spectrum sharing environment is analysed. Focusing on the secondary communication process, a relay selection procedure is performed prior to the communication process, where the selected relay is the one maximising the instantaneous end-to-end signal-to-noise ratio (SNR) and, at the same time, satisfying the power restrictions imposed by the primary receivers. The secondary destination employs a selection combining strategy, selecting the best path (direct link or relaying link) with the highest instantaneous SNR. Two kinds of relaying protocols are considered: decode-and-forward and amplify-and-forward. For the former, an exact closed-form expression for the outage probability (OP) is derived, whereas for the latter an accurate approximation for the OP is obtained. Then, an asymptotic analysis is carried out and reveals that the system diversity order is N + 1 for both relaying protocols, with N denoting the number of relays. Monte Carlo simulations assess the accuracy of the authors' results.