相控阵主动雷达导引头波形策略  

Waveform strategy for phased array active radar seeker

作　　者：蒋兵兵[1] 盛卫星[1] 张仁李[1] 韩玉兵[1] 马晓峰[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《航空学报》2017年第4期182-194,共13页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(11273017;61401207;61471196);江苏省自然科学基金(BK20140793);江苏省2015年度普通高校研究生科研创新计划(KYLX15_0375)~~

摘　　要：针对高脉冲重复频率脉冲多普勒(HPRF-PD)体制的相控阵主动雷达导引头中存在的距离遮挡问题,设计了一种新的波形选择策略。首先,利用提出的脉冲重复频率(PRF)波形选择策略,离线计算得到距离对应PRF的波形查找表。然后,通过叉积自动频率控制环路滤波(CPAFCLF)算法预估下个相参处理间隔(CPI)导引头与目标间的径向相对速度,并联合提出的基于Sage-Husa带有速度预测的自适应"当前"统计模型(SH-ACSMVP)算法得到的距离跟踪值,获得下个CPI的距离预测值。在跟踪机动目标场景中,相比于"当前"统计(CS)模型跟踪算法及基于"当前"统计模型的自适应无迹卡尔曼滤波(CAUKF)算法,本文算法得到的距离预测误差更小,误差收敛速度更快。根据此距离预测值从波形查找表中选择波形发射,作为下个CPI的发射波形,实现后续跟踪阶段的抗距离遮挡,提高目标跟踪性能。仿真结果表明了本文所设计波形选择策略的正确性及有效性。This paper considers the range eclipsing problem in a high pulse repetition frequency pulse Doppler（HPRF-PD）phased array active radar seeker.A novel waveform selection strategy is designed.In this strategy,a waveform lookup table concerning range and pulse repetition frequency（PRF）is firstly obtained off-line according to the PRF selection strategy proposed in this study.A method called cross product automatic frequency control with loop filter（CPAFCLF）is then utilized to predict the radial velocity between the seeker and the target of next coherent processing interval（CPI）.Meanwhile,a range tracking algorithm called Sage-Husa-based adaptive current statistical model with velocity prediction（SH-ACSMVP）is proposed to obtain a predicted range value for next CPI.Compared with current statistical（CS）model and current statistical model based adaptive unscented Kalman filter（CAUKF）,the proposed method exhibits a better range predicting performance in tracking a maneuvering target,with smaller predicted error and faster error convergence.With this predicted value,the transmitting waveform is selected from the waveform lookup table,and a range eclipsing problem will not be generated in the tracking stage.Simulations highlight the correctness and effectiveness of our proposed waveform strategy.

关 键 词：相控阵 雷达导引头 波形策略 脉冲多普勒 距离遮挡 Sage-Husa算法 

分 类 号：TN958.2[电子电信—信号与信息处理] V243.2[电子电信—信息与通信工程]