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首页> 外文期刊>Communications, IEEE Transactions on >Performance Analysis of Relay-Based Cooperative Spectrum Sensing in Cognitive Radio Networks Over Non-Identical Nakagami- $m$ Channels
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Performance Analysis of Relay-Based Cooperative Spectrum Sensing in Cognitive Radio Networks Over Non-Identical Nakagami- $m$ Channels

机译：非相同Nakagami- $ m $ 渠道

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摘要

This paper provides performance analysis of relay-based cognitive radio (CR) networks and presents a detect-amplify-and-forward (DAF) relaying strategy for cooperative spectrum sensing over non-identical Nakagami- $m$ fading channels. An advanced statistical approach is introduced to derive new exact closed-form expressions for average false alarm probability and average detection probability. We also introduce a novel approximation to alleviate the computational complexity of the proposed models. This paper points out the inconsistency of several assumptions that are typically used for performance analysis of CR networks and reveals that channel fading on the relaying links yields similar performance degradations as on the sensing channel. The study also shows that it is not necessary to incorporate all CRs in the cooperative process and that a small number of reliable radios are enough to achieve practical detection level. Compared with the amplify-and-forward strategy, refraining the heavily faded relays in the DAF strategy improves the detection accuracy and reduces the bandwidth requirement of the relaying links. The presented analysis could lead to intuitive system design guidelines for CR networks impaired with non-identical faded channels.
机译：本文提供了基于中继的认知无线电（CR）网络的性能分析，并提出了一种用于非相同Nakagami- $ m $ 衰减通道。引入了一种先进的统计方法来为平均虚警概率和平均检测概率推导新的精确封闭式表达式。我们还介绍了一种新颖的近似方法，以减轻所提出模型的计算复杂性。本文指出了通常用于CR网络性能分析的几个假设的不一致之处，并揭示了中继链路上的信道衰落会产生与传感信道类似的性能下降。研究还表明，不必在协作过程中包含所有CR，并且少量可靠的无线电足以达到实用的检测水平。与放大转发策略相比，在DAF策略中避免严重衰减的中继可以提高检测精度并降低中继链路的带宽要求。所提出的分析结果可能会导致针对具有不完全相同的衰落信道的CR网络的直观系统设计指南。

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