基于免疫粒子群算法的宽带雷达目标模拟系统幅频响应校准  

Calibration of the Amplitude-Frequency Response for Wideband Radar Target Simulation System Based on Immune Particle Swarm Algorithm

作　　者：李益民 潘明海[1] Li Yimin;Pan Minghai(Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学,南京211106

出　　处：《航空兵器》2020年第4期86-90,共5页Aero Weaponry

摘　　要：系统中的射频前端电路和数模转换器会使输出信号的幅频响应产生较大的纹波。对于宽带系统,这种纹波会变得更剧烈。为了减小通带内的纹波,本文采用基于免疫理论的粒子群算法,设计了一种数字有限脉冲响应(Finite Impulse Response,FIR)滤波器来补偿通带中的纹波,并在系统的FPGA(Field Programmable Gate Array)中进行实现,解决了采用传统均衡器无法对宽带系统中剧烈变化的纹波进行精确校准的问题。系统测试仿真结果表明,对于1 GHz带宽的雷达目标模拟系统,采用免疫粒子群优化算法设计的FIR滤波器可以将通带内纹波降低到1 dB以下。The radio frequency(RF)front-end analog circuit and the digital-to-analog converter in the system cause large ripple in the amplitude-frequency response of the output signal.For broadband systems,this distortion becomes more sever.In order to reduce the ripple in the passband,this paper uses a particle swarm optimization algorithm based on immune theory to design a digital finite impulse response(FIR)filter to compensate the ripple in the passband,and the FIR filter is implemented in an system FPGA(field programmable gate array).It solves the problem that the traditional equalizer method can not accurately calibrate the dramatic ripple in broadband system.The experimental simulation analysis of the system shows that the FIR filter designed by the immune particle swarm optimization algorithm can reduce the ripple in the passband to less than 1 dB for the radar target simulation system with 1 GHz bandwidth.

关 键 词：雷达目标模拟系统 纹波 免疫粒子群优化算法 FIR滤波器 FPGA 

分 类 号：TJ765.4[兵器科学与技术—武器系统与运用工程] TN955.2[电子电信—信号与信息处理]