TWACS调制信号时频分析方法的研究  

Study of time-frequency analysis methods of TWACS modulated signal

作　　者：赵永平[1] 张世平[1] 赵万生[2] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001 [2]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工业大学学报》2005年第6期839-841,共3页Journal of Harbin Institute of Technology

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.

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 

分 类 号：TN915[电子电信—通信与信息系统]