摘要： 为实现230 MHz频段电力无线通信频谱的快速可靠认知，提出一种协作式步进频域能量检测算法。该算法在频域进行2次步进能量检测，第一次步进能量检测以较大的步进值对全频段进行快速检测，检测中被占用的频带将以较小的步进值进行第二次步进能量检测。同时，监测频段、步进值等关键参数可根据实际需求灵活配置，最终得到230 MHz频段的频点使用情况。仿真结果表明，与传统频域能量检测算法相比，该算法在低信噪比条件下可获得较高的检测概率，且适用于230 MHz电力专属频段的频谱实时监测。

关键词: 无线通信, 认知无线电, 230 MHz频段, 频谱认知, 能量检测, 低信噪比, 检测概率

Abstract: In order to realize the fast and reliable recognition of wireless power communication frequency spectrum in the 230 MHz frequency band,this paper proposes a Cooperative Stepper Frequency Domain Energy Detection(CSFDED) algorithm.The algorithm performs 2 times of step energy detection in the frequency domain.The first time of step energy detection will quickly detect the entire frequency band with a larger step value,and the frequency band occupied in the detection will be subjected to the second time of step energy detection with a smaller step value.At the same time,key parameters such as monitoring frequency band and stepping value can be flexibly configured according to actual needs,and finally the usage of frequency points of the 230 MHz frequency band are obtained.The simulation results show that,compared with the traditional frequency domain energy detection algorithm,the proposed algorithm can obtain a higher detection probability under low Signal-to-Noise Ratio(SNR) conditions,and is suitable for real-time spectrum monitoring in the 230MHz power-specific frequency band.

Key words: wireless communication, cognitive radio, 230 MHz frequency band, spectrum sensing, energy detection, low Signal-to-Noise Ratio(SNR), detection probability

中图分类号: 

• TM721