Performance of Amplify-and-Forward Systems with Partial Relay Selection under Spectrum-Sharing Constraints
Performance of Amplify-and-Forward Systems with Partial Relay Selection under Spectrum-Sharing Constraints
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DOI：
10.1109/twc.2011.120911.102240
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发表时间：
2012-02-01
影响因子：
10.4
通讯作者：
Aissa, Sonia
中科院分区：
文献类型：
--
作者：
Ben Fredj, Kais;Aissa, Sonia
本文重点研究了频谱共享环境下中继系统的性能。我们认为，一个次要用户（SU）被允许与一个主要用户（PU）共享频带，只要它满足预定义的干扰约束设置的PU。我们假设SU的发送器和接收器无法直接通信，因此，通过一组中间终端节点来帮助将数据从源传递到目的地。中继节点的功能，使用放大和转发（AF）和一个单一的“最佳”的中间节点是选择一个集群中的部分中继选择（PRS）技术的手段，中继信息到目的地。统计的端到端的信号噪声比（SNR），即概率密度函数（PDF）和矩生成函数（MGF），推导出并用于下一个评估的误码率（BER）的几种调制方案。数值结果和解释完成了研究。
This article focuses on the performance of a relay system in spectrum-sharing context. We consider that a secondary user (SU) is allowed to share the spectrum band with a primary user (PU) as long as it meets predefined interference constraints set by the PU. We suppose that the SU's transmitter and receiver are unable to communicate directly and, thus, are helped by a set of intermediate terminal nodes to deliver the data from the source to the destination. The relay nodes function using amplify-and-forward (AF) and a single "best" intermediate node is selected among a cluster by means of partial relay selection (PRS) technique to relay the information to the destination. Statistics for the end-to-end signal-to-noise ratio (SNR), namely, the probability density function (PDF) and the moment generating function (MGF), are derived and used next to evaluate the bit error rate (BER) of several modulation schemes. Numerical results and interpretations complete the study.