抗频率偏移协作干扰非线性抑制算法  

Nonlinear cancellation algorithm for cooperative jamming against frequency offset

作　　者：文荣[1,2] 何怡敏 张译丹 赵宏志 唐友喜[1] WEN Rong;HE Yimin;ZHANG Yidan;ZHAO Hongzhi;TANG Youxi(National Key Laboratory of Wireless Communications,University of Electronic Science and Technology of China,Chengdu 611731,China;School of Network&Communication Engineering,Chengdu Technological University,Chengdu 611730,China)

机构地区：[1]电子科技大学通信抗干扰全国重点实验室,四川成都611731 [2]成都工业学院网络与通信工程学院,四川成都611730

出　　处：《通信学报》2025年第4期71-79,共9页Journal on Communications

基　　金：成都工业学院基金资助项目(No.2023ZR008)。

摘　　要：针对协作干扰机与授权接收机之间频率偏移恶化协作干扰非线性抑制性能的问题,提出一种基于多自适应滤波器联合系数估计的抗频率偏移协作干扰非线性抑制算法。考虑协作干扰机与授权接收机之间独立晶振与相对运动引入频率偏移,结合功率放大器非线性失真的问题,建立协作干扰非线性接收信号数学模型。通过将协作干扰联合信道分解为动态与静态两部分,将原系统模型转换为递归模型。基于频率偏移的存在区间,通过假设频率偏移值,利用多个自适应滤波器联合估计协作干扰非线性重建系数,完成协作干扰抑制。仿真结果表明,在相同复杂度下,所提算法的抗频率偏移性能优于现有协作干扰非线性抑制算法。To solve the problem of deteriorating nonlinear cancellation performance for cooperative jamming(CJ)caused by the frequency offset between the cooperative jammer and the authorized receiver,a nonlinear cancellation algorithm for CJ against frequency offset based on joint coefficient estimation of multiple adaptive filters was proposed.Considering the frequency offset introduced by the independent crystal oscillator and relative movement between the cooperative jammer and the authorized receiver,combined with the problem of nonlinear distortion in power amplifiers,a mathematical model for the CJ nonlinear reception signals was formulated.By decomposing the CJ joint channel into dynamic and static parts,the original system model was transformed into a recursive model.Based on the existence interval of the real frequency offset,by assuming the frequency offset value,multiple adaptive filters were used to jointly estimate the CJ nonlinear reconstruction coefficient,thereby achieving CJ cancellation.Simulation results demonstrate that the proposed algorithm outperforms existing nonlinear CJ cancellation algorithms in terms of anti frequency offset performance under the same complexity level.

关 键 词：协作干扰 非线性失真 频率偏移 递归自适应滤波 

分 类 号：TN92[电子电信—通信与信息系统]