基于Radon-Wigner变换的LFM扩谱信号的检测  

Method for Detecting and Estimating the Parameters of LFM Spread Spectrum Signals Based on Radon-Wigner Transform

作　　者：张海瑛[1] 孙洁[2] 袁超伟[1] 

机构地区：[1]北京邮电大学通信网络综合技术研究所,北京100876 [2]中国电子科技集团公司第54研究所,河北石家庄050081

出　　处：《无线电工程》2006年第10期19-21,共3页Radio Engineering

摘　　要：提出了基于Radon-Wigner变换的线性调频扩谱信号的检测方法。根据LFM扩谱信号的特点,首先采用倒谱法估计出信号的码速率,然后截取一个码元的信号来提取码内的细微特征,通过检测由RWT生成的变换域,可以准确提取信号的调频斜率、载频等参数。理论和仿真实验表明,该方法有较强的抑制噪声能力。A method for detecting and estimating the parameters of chirp spread spectrum signals based on Radon- Wigner transform is proposed. According to the characteristics of this kind of signals, the baud rate of the signals can be accurately estimated by cepstrum while the carrier and chirp rate can be computed by Radon- Wigner transform .The theoretical analysis and the simulation results show that this method can effectively suppress the noise of LFM signals.

关 键 词：RADON-WIGNER变换 时频分析 线性调频扩谱信号 倒谱 

分 类 号：TN911.7[电子电信—通信与信息系统]