摘要
提出一种基于离散短时傅里叶变换在时域和频域解调2FSK信号的方法,介绍此方法的基本原理,给出解调的依据,并详细阐述一种新的码元同步算法,该同步算法分为粗同步和细同步两个步骤,从理论上分析采用该算法可以实现精确的码元同步,实验中采用Matlab工具进行仿真,仿真结果表明同步情况理想,解调效果良好。
A BFSK demodulation method using discrete short- time Fourier transform is presented. This method discusses the BFSK signal in time- frequency domain, the principle and basis of demodulation of the method are introduced,a new code synchronization algorithm is given in the paper too, the algorithm can be divided into two parts., coarse synchronizing and minute synchronizing. The accurate code synchronization can be realized in theory, and after simulated by matlab in experiment, the result indicates the synchronous situation is perfect and the demodulation is all right.
出处
《现代电子技术》
2008年第23期37-38,46,共3页
Modern Electronics Technique
基金
福建省科技厅项目基金资助(JB06062)
关键词
FSK
离散短时傅里叶变换
解调
码元同步
FSK discrete short - time Fourier transform demodulation code synchronization
