基于相对无模糊相位重构的自动脉内调制特性分析

The automatic analysis of intrapulse modulation characte- ristics based on the relatively non-ambiguity phase restoral

文章首先分析并给出了相对无模糊相位重构算法,在此基础上构建了基于相位差分峰值幅度比较的BPSK及QPSK调制信号调制方式识别方法和基于最小二乘相位差分直线拟合的LFM信号调制方式识别方法。仿真结果充分验证了相位重构算法和调制方式识别方法的有效性。

The problem of how to automatically analyze intrapulse modulation characteristics is discussed in the paper. An approach to restoring relatively non-ambiguity phase is first introduced, which is proved to be effective according to some simulation results. And the modulation recognition methods for BPSK and QPSK based on the amplitudes of peaks of the phase difference and for LFM based on LS fitting of a line are developed. The critical signal-to-noise required to effectively identify the modulation is also discussed. Several simulations are performed on BPSK, QPSK and LFM, and simulation results demonstrate the efficiency of the modulation recognition approaches.