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首页> 外文期刊>IEEE Transactions on Cognitive Communications and Networking >A Multichannel Spectrum Sensing Fusion Mechanism for Cognitive Radio Networks: Design and Application to IEEE 802.22 WRANs
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A Multichannel Spectrum Sensing Fusion Mechanism for Cognitive Radio Networks: Design and Application to IEEE 802.22 WRANs

机译：认知无线电网络的多通道频谱感知融合机制：IEEE 802.22 WRAN的设计和应用

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摘要

The IEEE 802.22 is a new cognitive radio standard that is aimed at extending wireless outreach to rural areas. Known as wireless regional area networks, and designed based on the not-to-interfere spectrum sharing model, WRANs are channelized and centrally controlled networks working on the under-utilized UHF/VHF TV bands to establish communication with remote users, so-called customer premises equipment (CPEs). Despite the importance of reliable and interference-free operation in these frequencies, spectrum sensing fusion mechanisms suggested in IEEE 802.22 are rudimentary and fail to satisfy the stringent mandated sensing requirements. Other deep-rooted shortcomings are performance nonuniformity over different signal-to-noise-ratio regimes, unbalanced performance, instability, and lack of flexibility. Inspired by these observations, in this paper, we propose a distributed spectrum sensing technique for WRANs, named multichannel learning-based distributed sensing fusion mechanism (MC-LDS). MC-LDS is demonstrated to be self-trained, stable, and to compensate for fault reports through its inherent reward-penalty approach. Moreover, MC-LDS exhibits a better uniform performance in all traffic regimes, is fair (reduces the false-alarm/misdetection gap), adjustable (works with several degrees of freedom), and bandwidth efficient (opens transmission opportunities for more CPEs). Simulation results and comparisons unanimously corroborate that MC-LDS outperforms IEEE 802.22 recommended algorithms, i.e., the AND, OR, and VOTING rules.
机译：IEEE 802.22是一种新的认知无线电标准，旨在将无线扩展范围扩展到农村地区。 WRAN被称为无线区域网，并基于不干扰频谱共享模型进行设计，是在未充分利用的UHF / VHF电视频段上工作的通道化和集中控制网络，可与远程用户（即所谓的客户）建立通信房地设备（CPE）。尽管在这些频率下进行可靠且无干扰的操作非常重要，但IEEE 802.22中建议的频谱感应融合机制是基本的，无法满足严格的强制感应要求。其他根深蒂固的缺点是在不同的信噪比机制下性能不均匀，性能不平衡，不稳定和缺乏灵活性。受这些观察的启发，在本文中，我们提出了一种用于WRAN的分布式频谱感知技术，称为基于多通道学习的分布式感知融合机制（MC-LDS）。事实证明，MC-LDS具有自我训练能力，稳定性，并通过其固有的奖惩机制来补偿故障报告。而且，MC-LDS在所有流量情况下均表现出更好的统一性能，是公平的（减少了虚假警报/误检测间隙），可调的（具有多个自由度）和带宽有效的（为更多的CPE提供了传输机会）。仿真结果和比较结果一致证明MC-LDS优于IEEE 802.22推荐的算法，即AND，OR和VOTING规则。

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