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中文摘要：
针对现有调制识别算法在低信噪比环境条件下识别率较低的问题,首次提出一阶循环均值算法对VHF频段信号进行调制分类识别,识别率得到大幅度提高.在估测一阶循环频率系列对应的一阶循环均值的基础上,选择一阶循环均值绝对值超过设定的截止值所对应的一阶循环频率作为候选循环频率,再通过循环平稳测试决定选择候选循环频率数目,实现对信号的调制分类识别,在信噪比大于-6 dB时,分类识别率可达到98％以上.
英文摘要：
In view of the problem of modulation recognition algorithm existing about low recognition rate under environment condition of low SNR,the algorithm of first-order cyclic moment was first presented used in band signal of VHF modulation classification recognition.The first-order cycle frequencies at which estimated first-order cyclic moment magnitudes exceed the cut-off value were selected as candidate cycle frequencies based on estimation first-order cyclic moment at first-order cycle frequency series,then decided to choose the number of candidate cycle frequency by a cyclostationarity test to realize signal modulation classification recognition.The classification recognition rate can reach more than 98％ under condition of SNR is greater than-6 dB.
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Outage probability analysis of partial AF relay selection in spectrum-sharing scenario with multiple
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