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对当前备受关注的认知无线电多点协作频谱感知技术进行了系统归纳与总结。对频谱感知基本问题进行研究,指出了低信噪比情况下单节点检测存在的局限性;接着着重对基于能量检测的多点协作检测技术和多种数据合并算法等最新的研究情况进行了介绍和评价;最后提出了一种具有自适应优化功能的协作频谱感知机制,对控制信道和检测判决信道采用两种控制方式,采用较为稳健的拓扑控制方式,提高了检测网络的稳定性和运作效率。
At present, we have systematically summarized and summarized the current multi-point cooperative spectrum sensing technologies of cognitive radio. The basic problem of spectrum sensing is studied. The limitations of single-node detection under low signal-to-noise ratio (SNR) are pointed out. Then the latest researches, such as multi-point cooperative detection based on energy detection and multiple data merging algorithms, are introduced. Finally, a collaborative spectrum sensing mechanism with adaptive optimization is proposed. Two control modes are adopted for control channel and detection decision channel, and a more robust topological control mode is adopted to improve the stability and operational efficiency of the detection network. .