一种基于时频矩的跳频参数估计算法  

A parameter estimation algorithm of frequency hopping signal based on time-frequency moment

作　　者：王焱 张晓林 WANG Yan;ZHANG Xiaolin(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《应用科技》2020年第6期18-22,共5页Applied Science and Technology

摘　　要：为有效解决跳频通信系统中的参数估计问题,本文对基于时频分析的跳频参数估计算法——时频矩法做出改进。引入了门限来处理时频矩图像,抑制了噪声对算法的干扰。为进一步提高跳频参数估计性能,将改进的时频矩法与时频图修正算法结合。仿真结果表明,经过修正之后,时频图更清晰,估计跳频参数的误差更小。In order to effectively solve the parameter estimation problem in the frequency hopping communication system,this paper improves the time-frequency moment method—frequency hopping parameter estimation algorithm based on time-frequency analysis.A threshold is introduced to process the time-frequency moment image,which suppresses the interference of noise to the algorithm.To further improve the performance of frequency hopping parameter estimation,the improved time-frequency moment method is combined with the time-frequency diagram correction algorithm.The simulation results show that the time-frequency diagram is clearer and the error of the estimated frequency hopping parameters is smaller after the correction.

关 键 词：跳频信号 跳频参数 时频分析 时频矩 自适应门限 能量检测 时频图修正 参数盲估计 

分 类 号：TN971[电子电信—信号与信息处理]