摘要
针对空对舰导弹的情况，研究一种将合成孔径雷达（ＳＡＲ）技术用于弹载制导雷达的方案，以提高其横向分辨率，实现对舰船目标的成象。弹载ＳＡＲ采用的是一种聚束照射（Ｓｐｏｔｌｉｇｈｔ）成象模式，通过运动补偿，可以转化为转台成象。在小转角的情况下，可以利用简单高效的ＦＦＴ距离－多普勒算法来进行成象处理。本文首先分析了空对舰导弹攻击目标的典型轨迹，给出了分辨率、成象区域、脉冲重复频率及成象时间与导弹飞行参数之间的关系；然后着重分析了运动补偿问题。最后，对所提方案进行了计算机仿真，并给出了硬件实现框图，提出用高速ＤＳＰ器件完成弹载ＳＡＲ信号处理的方案。
Investigates a method which applies synthetic aperture radar (SAR) technique to improve the azimuth resolution of the guiding radar on antiship missile launched by aircraft. Based on this method, imaging of ships can be realized by missile borne guiding radar. Missile borne SAR operates in a sort of spotlight mode. After motion compensation, it can be treated as imaging rotating objects. If small rotating angle is assumed, simple and effective FFT range Doppler algorithm can be used to implement the imaging processing. This paper analyses the typical track of the missile when attacking a ship target and presents the relations between the resolution, imaging area, pulse repetition frequency and the flight parameters of the missile. Then a thorough investigation on motion compensation is made. At last, computer simulation for the proposed method is performed. Also it presents the hardware block diagram which uses DSP devices to implement the SAR signal processing of the missile borne guiding radar.
出处
《南京航空航天大学学报》
EI
CAS
CSCD
北大核心
1997年第2期162-168,共7页
Journal of Nanjing University of Aeronautics & Astronautics
关键词
合成孔径雷达
雷达制导
反舰导弹
synthetic aperture radar
radar guidance
antiship missile
spotlight
motion compensation
