基于自适应算法的应答器传输模块解调方法研究

摘要

Traditional non-coherent demodulation method and coherent demodulation method are adopted in demodulation about balise message in Balise Transmission Module currently.Non-coherent demodulation method is simple and easy to implement,but the anti-jamming performance is poor and difficult to solve the problem of phase daley of received signal.Coherent demodulation method of anti-jamming pedormance is good,but it requires the setting and send the equipment with the high frequency signal ocarrier frequency and phase with the local reference to the carrier,is too complicated to implement,and affect the rate of demodulation.In order to solve these deficiencies,adaptive algorithm is tried to introduce advanced in communication field to demodulate 2FSK balise message in Balise Transmission Module.MATLAB simulation software is tried to use to understand the performance analysis.The results show that adaptive demodulation algorithm can well solve the shortage of traditional demodulation algorithm and obtains a good effect of demodulation.%当前应答器传输模块解调应答器报文采用传统的非相干解调法和相干解调法,非相干解调法简单易于实现,但抗干扰性能差,难于解决接收信号的相位延迟的问题.相干解调法抗干扰性能好；但要求设置与发送设备中的高频信号载波同频同相的本地参考载波,实现起来过于复杂,且影响解调的速率.为了解决这些不足,尝试在应答器传输模块中引入通信领域先进的自适应算法对应答器报文2FSK信号进行解调,运用Matlab仿真软件进行了解调性能分析.结果表明自适应解调算法能较好地解决传统解调算法存在的不足,取得了较好的解调效果.