摘要
将S变换(ST)时频分析方法应用到时相调制(TPM)信号的分析和处理中。ST及其反变换(IST)分别有多种实现算法,这些算法组合的选择对TPM解调系统的性能有重要影响。在介绍ST和IST多种实现算法的基础上,仿真了TPM信号的ST和IST,对比分析了各种算法组合的性能。仿真结果表明:在恢复TPM信号波形方面,fST-fIST组合的性能最优,tST-tIST(mtIST)组合的性能次之,交叉算法组合的性能最差。所得结论为后续的TPM信号滤波和检测过程中ST和IST算法的选择提供了重要依据。
The S-transform（ST） time-frequency analysis method is applied to the analysis of Time-Phase Modulation（TPM）. There are many algorithms of ST and its inverse transform（IST） calculation, and the selection of algorithm plays an important part in the TPM demodulation performance. After describing the algorithms of ST and IST, the simulation about ST and IST of TPM is performed. The simulation results show that the performance of the fST- fIST algorithm is the best, the performance of the tST - fIST （mtIST） algorithm is better and the performance of the crossed algorithm is the worst. The conclusion provides a basis for the selection of ST and IST algorithms in the TPM filtering and detection.
出处
《电讯技术》
北大核心
2011年第10期41-45,共5页
Telecommunication Engineering
基金
国家自然科学基金资助项目(60772056)~~
关键词
时频分析
时相调制
S变换
S反变换
性能分析
time-frequency analysis
time-phase modulation
S-transform
inverse S-transform
performance analysis
