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分析了锯齿波调频信号相位差分序列的特征,在此基础上给出了锯齿波调频信号的识别和参数估计方法,并采用多重相位差分改善了算法对低信噪比环境的适应能力。仿真给出了不同信噪比下对锯齿波调频的识别率。
The characteristics of sawtooth-wave FM signal phase difference sequence are analyzed. Based on this, the identification and parameter estimation of sawtooth-wave FM signal are given, and the adaptive ability of the algorithm to low SNR environment is improved by using multiple phase difference. The simulation gives the recognition rate of sawtooth frequency modulation under different SNR.