复杂环境下基于联合特征聚类的多跳频网台分选  

Multi frequency hopping network station sorting based on joint feature clustering in complex environment

作　　者：朱政宇[1,2] 王家政 梁静 王忠勇[1] 巩克现[1] ZHU Zhengyu;WANG Jiazheng;LIANG Jing;WANG Zhongyong;GONG Kexian(School of Electrical and Information Engineering,Zhengzhou University,Zhengzhou 450001,China;National Mobile Communications Research Laboratory,Southeast University,Nanjing 210018,China)

机构地区：[1]郑州大学电气与信息工程学院,河南郑州450001 [2]东南大学移动通信国家重点实验室,江苏南京210018

出　　处：《通信学报》2023年第9期218-227,共10页Journal on Communications

基　　金：国家重点研发计划基金资助项目(No.2022YFD2001200);国家自然科学基金资助项目(No.61922072);河南省自然科学基金资助项目(No.232300421097);河南省高校科技创新人才支持计划基金资助项目(No.23HASTIT019);中国博士后科学基金资助项目(No.2023T160596);东南大学移动通信国家重点实验室开放课题基金资助项目(No.2023D11)。

摘　　要：为了从混叠信号中去除干扰并分选出各个跳频网台信号,提出一种基于联合特征聚类的多跳频网台分选算法。首先,对混叠信号进行短时傅里叶变换得到时频矩阵,并根据时频矩阵能量分布直方图进行自适应阈值去噪;其次,通过形态学滤波处理,去除扫频干扰;再次,进行连通域标记,计算各段信号的持续时长和平均能量,以此去除定频干扰和短突发干扰并组成各跳频段的联合特征向量;最后,利用MeanShift算法对各段信号的联合特征向量进行聚类分析,完成各个跳频信号的分选。仿真结果表明,相比传统跳频网台分选算法,所提算法对混叠信号具有更高的分选率、更强的抗干扰能力和更广泛的适用性。In order to remove interference from hybrid signals and sort each frequency hopping station signal,a multi frequency hopping network station sorting algorithm based on joint feature clustering was proposed.Firstly,short-time Fourier transform was applied to the sorted hybrid signals to obtain the time-frequency matrix,and adaptive threshold denoising was carried out according to the energy distribution histogram of time-frequency matrix.Secondly,the sweep interference was removed by morphological filtering.Thirdly,the connected domain was labeled,the duration and average energy of each signal were calculated to remove the fixed frequency interference,and the joint feature vector for each frequency hop was formed.Finally,the MeanShift algorithm was used to cluster and analyze the joint feature vectors of each segment of the signal,completing the sorting of each frequency hopping signal.The simulation results show that the proposed algorithm has higher sorting rate,stronger anti-interference ability and wider applicability to hybrid signals compared with the traditional algorithm.

关 键 词：跳频信号 网台分选 MEANSHIFT 时频分析 连通域标记 

分 类 号：TN92[电子电信—通信与信息系统]