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为了克服内调制时伴生调幅现象对相位生成载波解调结果的影响,提出了一种相位生成载波解调改进算法。通过利用干涉信号中的三次谐波分量和基频分量进行解调,有效地消除了伴生调幅对解调结果的影响。改进后的算法减少了一路混频信号的产生,降低了数字解调时占用的内存及系统的采样频率。给出了改进算法的Matlab仿真和CCS硬件仿真实验结果,分析验证了算法的可行性。
In order to overcome the effect of the accompanying amplitude modulation on the demodulation results of the phase-generated carrier during intra-mode modulation, an improved demodulation algorithm of phase-generated carrier is proposed. By using the third harmonic component and the fundamental frequency component of the interference signal for demodulation, the effect of the associated amplitude modulation on the demodulation result is effectively eliminated. The improved algorithm reduces the generation of mixed signals and reduces the memory and system sampling frequency in digital demodulation. The improved Matlab simulation and CCS hardware simulation results are given, and the feasibility of the algorithm is verified.