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一种应用于电力无线专网的两级双门限本地频谱感知技术研究

DOI: 10.13334/j.0258-8013.pcsee.2015.10.013, PP. 2471-2479

Keywords: 智能配用电,电力无线通信,频谱感知,能量感知,循环平稳特征感知

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Abstract:

新型电力无线宽带系统是为满足智能配用电系统的通信需求,在电力专用230MHz频谱资源上研究开发的电力无线专网,该系统在应用过程中可能存在与230数传电台共用同一段频谱的情况。为保证2个系统同时稳定、高效的运行,提出一种结合能量感知和循环平稳特征感知2种检测算法的两级双门限本地频谱感知算法。这种算法首先通过能量感知法进行粗检测,然后根据噪声不确定性情况选择使用循环平稳特征感知算法进行细检测。若噪声的不确定性大,就自动增加循环平稳特征感知的比例,若噪声的不确定性小,则自动减小甚至不进行循环平稳特征感知。这样,既保证了检测的正确性,又能动态调整计算量。仿真结果和性能分析表明,该算法在保证系统检测性能的同时,降低计算的复杂度,并有效提升检测性能。

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