多分量线性调频信号时-频分析的交叉项抑制  

The cross-terms Suppression in Time-frequency Analysis of the Lfm Signal

作　　者：俸玉祥 逯锋兵[1] 石晓萍 葛宏宇[1] FENG Yuxiang;LU Fengbing;SHI Xiaoping;GE Hongyu

机构地区：[1]中国电子科技集团公司第三十四研究所,桂林541004

出　　处：《数字通信世界》2020年第5期91-93,共3页Digital Communication World

摘　　要：自线性调频信号被用于通信以来,线性调频信号作为载波的扩频通信方式因为具备抗多普勒频移,系统功耗低,传输距离远等优点而得到快速发展。对线性调频信号普遍采用WVD时-频分布进行分析,但是多分量线性调频信号的WVD时-频分布存在严重交叉项问题。通过实验仿真验证:采用时频重排平滑伪WVD(RSPWVD)变换方法可以有效的抑制多分量线性调频信号的交叉项。Since the multi-component linear frequency modulation(LFM)signal was used in communication,The LFM signal as carrier of the Spread spectrum communication has been developed rapidly,that has the advantages of anti-Doppler shift,low power consumption and long transmission distance.The Wegener-Wiley(WVD)time-frequency distribution of The LFM signal is used commonly.However,the WVD time-frequency distribution of the multi-component the LFM signals has serious cross-term problems.Verified by experimental simulation:The time-frequency rearrangement smoothing pseudo WVD transform method can effectively suppress the cross-term of the multi-component LFM signals.

关 键 词：线性调频信号 WVD时-频分布 交叉项 

分 类 号：TN911.6[电子电信—通信与信息系统]