模拟调制信号正交解调的抗载频失配性能分析

Anti-Carrier-Frequency-Mismatch Performance Analysis of Analog Modulation Signal Quadrature Demodulation

文章通过对模拟调制信号中两种典型的调制信号AM信号和FM信号进行数字正交解调的研究,探讨分析了该方法相较于相干解调所具有的较强抗载频失配能力,推导了AM、FM正交解调方法所允许的最大载频偏差Δfmax,为实际应用提供了理论依据。

This paper researches a method for quadrature demodulation of AM signal and FM signal, then analyses that the method has better anti-carrier-frequency-mismatch performance compared with coherent demodulation, and derives the maximum carrier frequency offset △ fmax allowed in AM and FM quadrature demodulation, respectively, so as to provide the theoretical basis for practical application.