一种基于全极点窗递归算法的PCM/FM信号解调方法

A Method to Demodulate PCM/FM Signal Using a Recursive Algorithm Based on All-pole Window

提出一种基于全极点窗递归算法DSTFT解调PCM/FM信号的新方法,该方法通过检测信号的瞬时频谱峰值来实现解调,摆脱了传统解调方法中的载波恢复环路。采用基于全极点窗的递归算法来计算信号的频谱能量,理论分析和仿真结果表明,该方法计算量较小,误码率较低。通过对实际数据进行解调,验证了该方法的有效性。

A novel Pulse Code Modulation/Frequency Modulation(PCM/FM) demodulation method using the DSTFT recursive algorithm based on all-pole window is proposed in this paper.The DSTFT-based PCM/FM demodulation method is simple because it demodulates the signal by searching the instantaneous spectral peaks without complicated carrier-recovery circuit.The recursive algorithm based on all-pole moving window is adopted to compute the signal's spectrum.Both analysis and simulation demonstrate that the computation of the algorithm is reduced and the bit error rate(BER) is degraded.Its effectiveness is illustrated by the test results for the algorithm using the real data.