%0 Journal Article
%T Hop Rate Estimation of Hybrid DS/FH Spread Spectrum Signals Based on a Channelized Spectral Enhancement Strategy<br>基于信道化谱增强的混合DS/FH扩频信号跳速估计
%A Zhu Ming-zhe
%A Ji Hong-bing
%A Jin Yan
%A <br>朱明哲
%A 姬红兵
%A 金 艳
%J 电子与信息学报
%D 2010
%I 
%X This paper addresses new hop rate estimation schemes for hybrid DS/FH_BPSK signals which employ a novel channelized spectral enhancement preprocessor and time-frequency analysis. Good performance is achieved by following three stages. Firstly, a nonlinear process is used to produce the reference signal which has the same hop rate as the original signal and its frequencies could be estimated by the cyclic spectrum. Then a novel Externally-Linear-Internally-Nonlinear(ELIN) channelized spectral enhancement system is employed to realize interference-suppression and enhance noisy signal without losing detail information. Finally, based on the reliable signal enhancement results, SPWVD(Smooth-Pseudo-Wigner-Ville Distribution) is used to estimate the hop rate of the hybrid DS/FH spread spectrum signal. Since no prior information of signals are needed, the proposed method is easy to implement for the reconnaissance receiver. The simulation results show that the proposed method can operate effectively even under low SNR conditions.
%K Military electronic countermeasures
%K Hybrid spread spectrum
%K Parameter estimation
%K Hop rate<br>通信对抗
%K 混合扩频
%K 参数估计
%K 跳速
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=9CF49B527C3BA18079181433638C6773&yid=140ECF96957D60B2&vid=9971A5E270697F23&iid=0B39A22176CE99FB&sid=C6EC7357BCACD3A4&eid=9DC563A0FEFC04F9&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=13