电讯技术Issue(2)：132-138,7.DOI:10.3969/j.issn.1001-893x.2014.02.004
强干扰下跳频信号的参数估计
Parameter Estimation of Frequency Hopping Signals under Strong Interference
摘要
Abstract
To estimate the parameters of the frequency hopping( FH) signal in communication countermeas-ures, a hop duration estimation method based on the core of time-frequency and a hop timing estimation method based on partial reception of frequency hopping signal are proposed. For hop duration estimation, on the basis of short time Fourier transform( STFT) , the core of time-frequency which varies with time is extracted, then the hop duration estimation is obtained according to wavelet transform and spectral analy-sis. For hop timing estimation,the partial reception of FH signal is adopted to avoid the strong interfer-ence,a reference signal which has the same transition information as the original signal is constructed, then a maximum likelihood estimation method is used to get the hop timing. Simulation shows that this algorithm features low computation complexity and high accuracy in time-frequency plane. The results indicate that this algorithm can estimate the hop duration and hop timing under the strong interference.关键词
通信对抗/跳频信号/参数估计/时频重心/最大似然法Key words
communication countermeasure/frequency hopping signal/parameter estimation/time-fre-quency core/maximum likelihood method分类
信息技术与安全科学引用本文复制引用
程曙晖,王斌..强干扰下跳频信号的参数估计[J].电讯技术,2014,(2):132-138,7.基金项目
国家自然科学基金资助项目(61201381)@@@@Foundation Item:The National Natural Science Foundation of China (No.61201381) （61201381）
