从载波相位调制解调原理出发,理论分析了载波频率漂移对解调结果的影响.通过对解调公式的推导及分析,给出了频率漂移对解调结果影响的公式.结果表明,当混频基频信号的频率与载波频率存在微小频差时,解调结果将出现低频调制,严重影响解调效果;仿真及实验验证结果与理论分析完全吻合.

A rigorous theoretical derivation on the influence of frequency drift of the carrier has been made in this paper. By analyzing the demodulation formula, the influence formula of frequency drift of the carrier was given. The formula shows that when there is a tiny difference between the frequency of modulation and demodulation signals, the demodulation result will be modulated by a low-frequency signal and the demodulation result will be distorted. Experimental and simulation were carried out on this basis, and the results are completely consistent with the theoretical analysis.