基于自适应抽取STFT的混合DS/FH扩频信号参数估计  

Parameter estimation of hybrid DS/FH spread spectrum signals based on adaptive decimating STFT

作　　者：朱明哲 姬红兵[1] 金艳[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《系统工程与电子技术》2010年第3期454-457,462,共5页Systems Engineering and Electronics

摘　　要：针对混合DS/FH扩频信号的参数估计问题,提出了一种基于自适应抽取的STFT信号分析方法。该方法利用STFT的信道化实现,采用抽取处理实现自适应窗长时频分析,有效地解决了窗长变化带来的数据量问题,易于通信侦测接收机实现。仿真实验以BPSK_DS/FH信号为例,表明了该估计方法的有效性。A new parameter estimation method for hybrid DS/FH spread spectrum signals is addressed,which employs adaptive decimation based STFT.It uses the decimation to realize the time-frequency representation with adaptive window width based on the filter-bank realization of STFT.Since the computational burden caused by the direct change of window width is alleviated,the proposed method is easy to realize for the reconnaissance receiver.The method is illustrated with BPSK_DS/FH signals and the simulation results show that the proposed method is effective for the parameter estimation.

关 键 词：混合扩频信号 参数估计 自适应时频分析 

分 类 号：TN953[电子电信—信号与信息处理]