一种基于幅度积分的FSK非相干解调算法

FSK作为一种常用的调制方式，在小型化低功耗数字通信系统中被广泛应用，因此低复杂度的FSK数字解调算法成为研究重点。本文基于传统的功率检测算法，提出了一种基于幅度积分的FSK非相干解调算法（Amplitude-Integration Demodulation Algorithm, AIDA）。在AIDA算法中，接收信号先经过两个频点对应的带通滤波器，然后对滤波信号进行一个符号周期内的幅度积分，再对两个积分值进行相减，从而得到解调信号。由于采用了幅度积分的算法，复杂度被大大降低。仿真结果表明，AIDA可以改善FSK的解调性能。

A FSK non coherent demodulationalgorithm based on amplitude integration

FSK,as a commonly used modulation method, is widely used in small scale and low power digital communication systems.Therefore, the low complexity FSK digital demodulation algorithm has become the focus of research.Based on the traditional power detection algorithm,this paper proposes an FSK non coherent demodulation algorithm(Demodulation Algorithm Amplitude-Integration,AIDA),which is based on amplitude integration.In Aida algorithm,the received signal first after two frequency point corresponding to the band pass filter and filtering of signals of a symbol period is the magnitude of the integral,the two integral value is subtracted, so as to obtain the signal demodulation. Due to the adoption of the amplitude integral algorithm,the complexity is greatly reduced.The simulation results show that AIDA can improve the demodulation performance of FSK.