基于自适应天线阵列波束成形的MFSK/FH系统分析  

Analysis of MFSK/FH system based on adaptive array antennawith beam-forming technique

作　　者：何邦甑 曾琦[2] HE Bangzeng;ZENG Qi(China Mobile(Chengdu)Information and Communication Technology Co.,Ltd,Chengdu 610061,China;Sichuan University,Chengdu 610065,China)

机构地区：[1]中移(成都)信息通信科技有限公司,四川成都610061 [2]四川大学,四川成都610065

出　　处：《通信与信息技术》2023年第6期13-17,共5页Communication & Information Technology

摘　　要：从空域滤波技术出发,在传统MFSK/FH系统接收端采用基于天线阵列的自适应波束成形(Beamforming,BF)技术(称为MFSK/FH-BF系统),从空/频域进一步提升跳频通信系统性能。首先设计一种适合跳频波形的天线阵列自适应波束成形接收机,消除因频率跳变带来的波束指向误差;随后,基于最小均方差(MMSE)直接矩阵求逆(SMI)的自适应波束成形算法,建立跳频和波束成形参数(频点个数、快拍数、信噪比SNR和信干比SIR等)与系统性能(干扰信噪比SINR和误码率)之间的理论关系;最后,仿真验证了MFSK/FH-BF系统的抗干扰性能。分析表明,MFSK/FH-BF接收系统可实现波束指向快速收敛,其抗干扰性能由跳频技术(频点个数)和多天线技术(阵列权值)共同决定,弥补了单一干扰抑制技术的不足,对于多种典型干扰具有良好的抑制性能。Motivated from spatial domain,an array antenna using adaptive beamforming(BF)technique is adopted in the tradi⁃tional receiver of frequency-hopping system with M-ary FSK modulation(MFSK/FH)system in this paper,i.e.,MFSK/FH-BF system,which further improves the anti-jamming performance.Firstly,a modified FH-BF receiver,which is suitable for FH waveform,is pro⁃posed to reduce the effect of hopped-frequency on the directions of beam pattern.Then,the numerical relations among the FH parame⁃ters(e.g.,the number of frequency slots),BF parameter(e.g.,the number of snapshots)and system performance(bit-error rate and out⁃put signal-to-interference-plus-noise ratio)are systematically analyzed by theoretical analysis.Finally,the performance of the MFSK/FH-BF system is verified by simulation analysis.The theoretical and simulation results reveal that the direction of beam pattern of pro⁃posed BF-MFSK/FH system converges fast;also,its performance is determined by FH(the number of frequency slots)and BF(the weight of array elements)factors.The proposed system is an efficient scheme to combat various kinds of jamming.

关 键 词：跳频系统 波束成形技术 阵列信号处理 输出SINR 性能分析 

分 类 号：TN925.1[电子电信—通信与信息系统]