探测高速目标的二相编码雷达技术研究

【作者】 倪慧俊；

【导师】 苏卫民；

【作者基本信息】 南京理工大学 ， 信号与信息处理， 2012， 硕士

【摘要】 现代电子对抗技术的日新月异,要求雷达具有极强的隐蔽性。而相位编码信号的随机特性使其具有低截获性能,因此相位编码雷达在雷达技术中占有非常重要的地位。本文针对二相码信号在探测高速目标方面的处理方法展开研究。本文主要研究二相编码雷达对高速目标的探测,其主要工作有：二相码探测雷达的波形设计,对目标进行跟踪测角,对高速目标的回波进行信号处理并设计雷达系统控制软件。对于测角,采用单脉冲和/差波束测角技术,基于其基本原理进行了公式推导,并给出方位角和俯仰角的数学表达式,对于高速目标的回波信号进行了脉冲压缩,Keystone变换校正距离走动,动目标显示(MTI)/动目标检测(MTD),恒虚警处理和目标凝聚处理,并在凝聚之后,采用双重重复频率解决速度模糊,并进行仿真验证。本文还设计了雷达系统控制软件,并解决了两个技术问题,其一是使用微软公司提供的Winsock类库,在VC6.0平台下实现了PC端软件与DSP(数字信号处理器)之间的网络通信,其二是使用双缓冲绘图法实现将PC从DSP端接收到的经过雷达信号处理和数据处理之后的代表航迹点的数据,在雷达系统控制软件的P显示屏上进行无闪烁的实时绘制。更多还原

【Abstract】 With the electronic countermeasure technology developing rapidly, it need to increase the radar anti-jamming ability. And phase-coded signal has the performance of low probability of intercept because of its pseudo randomness, so the phase-coded radar plays an important role in radar field. The paper research the method of detecting high speed target in PBRC radar system.This paper mainly research the design of transmitted waveform on PBRC radar. The main working is designing the signal. And givinging the technology of measuring sum and difference beam angle, The paper contrapose high speed target,give the method of radar signal processing and design control software of radar system. To the technology of measuring sum and difference beam angle, the paper gives the mathematical expression of the two angles based on the principle. To the high speed target, the paper has some processing to the echo-wave, such as pulse compression, Keystone transform which adjusts range walking moving target indication(MTI)/moving target detection(MTD), CFAR processing and target coagulation processing, and also presenting a method of solving velocity ambiguity which is to send the pulse with two kinds of repeat frequence. And all above has been through the simulation. The paper also design the software of radar control system. And solving the two major technology problems, one hand is to use the class Winsock which is offered by Microsoft archive the communication between the PC and DSP on VC6.0. The other hand is using double buffering method to draw the data standing for points which are received from DSP on the P screen which have no splash.更多还原