基于改进时频脊线的多用户宽带跳频信号参数估计方法  

Parameter Estimation Method of Multi-broadband Frequency Hopping Signal Based on Improved Time-frequency Ridge

作　　者：安建 刘旭东 吕飞飞 郑巧娜 刘文旭 AN Jian;LIU Xudong;L Feifei;ZHENG Qiaona;LIU Wenxu(Unit 61096,PLA,Beijing 102300,China;The 54th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050081,China)

机构地区：[1]中国人民解放军61096部队,北京102300 [2]中国电子科技集团公司第54研究所,石家庄050081

出　　处：《计算机测量与控制》2025年第4期225-231,共7页Computer Measurement &Control

摘　　要：针对多用户宽带跳频信号参数估计问题,提出了一种基于改进时频脊线的参数估计方法;基于短时傅立叶变换获得的时频矩阵,进行最高与最低时频脊线的计算和处理,联合两时频脊线差分结果进行滑窗处理,进而获得了跳频时刻粗估计结果,基于漏跳问题,实现了跳频时刻校正,使用矫正后的结果,通过最小二乘拟合,计算得到了跳速与跳频时刻的估计结果;经仿真试验测试,验证了该算法在不同带宽和跳速下的有效性,跳速估计平均值准确,标准差在0.006%以内,跳频时刻估计误差平均值和标准差分别在0.18%和0.14%以内;经实测跳频信号测试,跳速估计平均值准确,标准差在0.03%以内;算法实现了多用户宽带跳频信号的跳速和跳频时刻估计,且计算量小,具有工程应用前景。Aiming at the parameter estimation of multi-user broadband frequency hopping signals,a parameter estimation method based on improved time-frequency ridge is proposed.Based on the time-frequency matrix obtained by short-time-Fourier transform(STFT),the highest and lowest time-frequency ridges are calculated and processed,and the sliding window is used to process the difference results of two time-frequency ridges,and then,the rough estimation results of frequency hopping time are obtained.For the missing hops,the frequency hopping time correction is realized.For the corrected results,the hopping speed and frequency hopping time are estimated by the least square fitting.Simulation test verifies that the algorithm has the effectiveness of different bandwidth and hopping speed,the hopping speed estimation average is accurate,with a standard deviation of within 0.006%,the average value of the estimation error and standard deviation of hopping time is 0.18%and 0.14%,respectively.Through actual testing,the hopping speed estimation average is accurate,with a standard deviation of within 0.03%.The algorithm realizes the estimation of hopping speed and hopping time for multi-broadband frequency hopping signals,with small calculation amount,which has the prospect of engineering application.

关 键 词：多用户宽带跳频信号 时频域参数估计 时频脊线提取 短时傅立叶变换 最小二乘拟合 

分 类 号：TN911[电子电信—通信与信息系统]