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在低信噪比和复杂性环境下,协作频谱检测是准确实现频谱感知的有效手段。文中分析了基于能量检测的单用户频谱检测算法以及基于硬判决和等权重的多用户协作频谱检测技术,导出了在高斯信道、Rayleigh衰落信道和Nakagami-m衰落信道情况下协作频谱检测虚警概率和漏检概率的闭合解析式,并对此进行了仿真验证和比较。结果表明,等权重协作频谱检测算法能够有效克服衰落信道对频谱检测的影响。
In low signal-to-noise ratio and complexity environment, collaborative spectrum detection is an effective way to realize spectrum sensing accurately. In this paper, single-user spectrum detection algorithm based on energy detection and multi-user cooperative spectrum detection based on hard decision and equal weight are analyzed. The false alarm probability of cooperative spectrum detection is derived in the case of Gaussian channel, Rayleigh fading channel and Nakagami-m fading channel And the probability of missing detection of the closed analytic formula, and the simulation verification and comparison. The results show that the equal-weight cooperative spectrum detection algorithm can effectively overcome the influence of fading channel on spectrum detection.