This letter proposes a novel spectrum sensing method for cognitive satellite communications for detecting primary user signals. First, the useful signal power is estimated from the noisy received signal by combining the second- and fourth-order moments of data under investigation. Second, the possible presence of the signal of interest is stated by exploiting the aforementioned useful power as the decision variable. Computer simulations, substantiated by theoretical results, are carried out to evaluate the performance of the method in comparison with recently published techniques. The results evidence the efficiency of the presented technique for cognitive satellite communications.

中文翻译：

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基于高阶矩的认知卫星通信频谱感知

这封信提出了一种用于认知卫星通信的新颖频谱感测方法，用于检测主要用户信号。首先，通过组合所研究数据的二阶和四阶矩，从有噪声的接收信号中估算出有用信号功率。其次，通过利用上述有用功率作为决策变量来说明感兴趣信号的可能存在。进行了以理论结果为依据的计算机仿真，以与最近发表的技术进行比较以评估该方法的性能。结果证明了所提出的技术用于认知卫星通信的效率。