摘要
研究在干扰较强的工业电网中提取双向工频自动通信系统(TWACS)调制信号特征的几种时频分析方法,对每一种检测方法的原理和实现过程都进行了分析,并给出了计算机仿真结果,比较了各种方法的检测指标和适用条件.结果表明:复值小波变换在几种时频分析方法中是最佳方案.
To get the detailed characteristics of two way automatic communication system (TWACS) inbound signal from industry power line with high disturbance, some time-frequency analysis methods are studied. Analyzing the principle and realizing process of each method, the corresponding simulation results are also given. In addition, the criterion and condition of each method are compared. Simulation results and theoretical analysis demonstrate that complex wavelet is the best time-frequency analysis method for detecting the inbound signal of TWACS.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2005年第6期839-841,共3页
Journal of Harbin Institute of Technology
关键词
TWACS
短时傅里叶变换
魏格纳分布
复值小波
时频分析方法
Computer simulation
Fourier transforms
Frequency domain analysis
Signal processing
Time domain analysis
Wavelet transforms
