重排谱图在跳频信号参数估计中的应用  

Application of rearrangement spectrogram in parameter estimation of frequency-hopping signal

作　　者：邓灵[1] 张天骐[1] 金静[1] 朱洪波[1] 

机构地区：[1]重庆邮电大学信号与信息处理重庆市重点实验室,重庆400065

出　　处：《计算机工程与设计》2013年第10期3422-3426,共5页Computer Engineering and Design

基　　金：国家自然科学基金项目(61071196;61102131);教育部新世纪优秀人才支持计划基金项目(NCET-10-0927);信号与信息处理重庆市市级重点实验室建设基金项目(CSTC2009CA2003);重庆市杰出青年基金项目(CSTC2011jjjq40002);重庆市自然科学基金项目(CSTC2010BB2398;CSTC2010BB2409;CSTC2010BB2411;CSTC2012JJA40008);重庆市教育委员会科研基金项目(KJ120525)

摘　　要：为能准确提取出跳频信号的参数,提出了基于重排谱图的方法对跳频信号进行参数提取。对跳频信号进行重排谱图,得到其能量分布的最大值,对由最大值构成的矢量进行傅里叶变换,根据得到的数据,按照峰值检测法进行估计,得到对跳频周期、跳变时刻及跳频频率的估计值。对跳频跳速(跳频周期的倒数)进行仿真,仿真结果表明,与简单的谱图方法相比,重排谱图具有更好的时频分辨率,并且能得到更精确的估计值。To accurately extract the parameters of frequency-hopping signals,a rearrangement of spectrogram method is put forward.Firstly,the Frequency-Hopping signals are utilized with the method of rearrangement spectrogram,and then,the vector which is constituted by the maximum of its energy distribution is obtained and the Fourier transform is carried out with it.The parameters such as hop duration,hop timing and hop frequency can be gotten in accordance with the data obtained and peak detection method.Simulation results of hopping jump speed indicate that,compared with the simple spectrogram method,the method of rearrangement spectrogram has a better time-frequency resolution and can obtain a more accurate estimated value.

关 键 词：跳频信号 参数估计 重排谱图 跳频周期 时频分辨率 

分 类 号：TN914.41[电子电信—通信与信息系统]