连续波雷达发射泄漏抑制技术研究

【作者】 周勇辉；

【导师】 谢仁宏；

【作者基本信息】 南京理工大学 ， 通信与信息系统， 2004， 硕士

【摘要】 本文介绍了连续波雷达发射泄漏，成因和对雷达的影响，及列举了几种常规的连续波雷达发射泄漏抑制方法。中断连续波体制是从雷达发射信号入手解决连续波雷达发射泄漏的方法。本文选择调频中断连续波(FMICW)作为研究重点。 根据FMICW信号波形特点，本文利用雷达信号分析工具推导了FMICW的零多谱勒模糊函数并给出了FMICW的零多谱勒模糊函数图，同时比较了随机中断脉冲序列和确定中断脉冲序列对调频中断连续波模糊函数的影响，以及设计确定中断脉冲序列FMICW的参数来获得探测范围内零噪声基底的模糊函数。在FMICW信号处理过程中，提出工程中设计时参数选取准则，用常规处理方法一—二维FFT得出了信号处理的仿真结果。对现有的FMICW信号二维FFT处理方法提出了改进。最后提出了一种适合探测海上高速运动目标的FMICW相关运算处理方法。更多还原

【Abstract】 This paper introduces the cause of CW radar’s transmit leakage and the effects on radar ’ operation and illustrate several means to restrain the leakage. Interrupted CW radar is the way using change the radar transmit signal to solve the transmit leakage problem. Frequency modulated interrupted continuous wave(FMICW) is chosen as the emphasis of this paper.Based on the characteristic of FMICW signal,this paper uses the radar signal analysis tool to deduce the ambiguity function (AF) of FMICW and draw it’s Zero-AF figure.At the same time,we compare the AF of random interrupted pulse with that of determinate interrupted pulse and design the parameters of determinate interrupted pulse FMICW signal to gain it’s AF with zero noise floor in the all detected range.During the course of FMICW signal process,we put forward the rules of choosing the parameters and get the simulative result using general two-demesion FFT.Current 2D-FFT sianal process is also improved here.Finally a method inintroduced of correlation operation suited to detect high-speed targets on sea.更多还原