一种多波形雷达信号全数字产生及处理系统  

AGeneration and Processing System for Arbitrary Signals for Pulse Compression Radars

作　　者：刘晟[1] 向敬成[1] 陈辅新[1] 

机构地区：[1]电子科技大学电子工程系

出　　处：《电子科技大学学报》1995年第S2期172-179,共8页Journal of University of Electronic Science and Technology of China

摘　　要：提出并实现了兼容多种雷达脉压信号的全数字产生及处理系统。其信号包括线性调频信号、非线性调频信号及其多相码、泰勒（Ｔａｙｌｏｒ）四相码信号等。利用级联型ＦＩＲ滤波器ＩＭＳＡ１００组成数字复相关脉压网络对多种带宽（带发达５ＭＨｚ）脉压信号进行实时数字处理；分析了数字方法运用于波形合成中由于ＤＡＣ零阶保持特性造成的信号频谱高频失真的机理；采用提高ＤＡＣ转换速率以获得近似理想冲激串取样的方法，产生了多种性能稳定、波形质量高的宽带雷达脉压信号。文中给出了部分模拟与实验结果。A generation and processing system for abitrary signals in pulse compres radars,involving linear frequency modulation( LFM),nonilnear frequency modulation(NLFM)and NLFMpolyphase codes and Taylor quardraphase codes,is put forword and realized. A digital complex correlaticonnetwork configured with FIR VLSI IMSA100S is designed and it can complete wideband(up to 5 MHz)pulse compression signal procession signal processing realtime. The mechanism of the signal spectrum distortion because of DAC's zero-order holding is analysed.By high DAC'update rate high-quality wideband sig nals for pulsecompression radars are generated. Some simulation and experiment results are provided.

关 键 词：雷达信号 脉冲压缩 非线性调频 泰勤四相码 数字波形产生 数字复相关 

分 类 号：TN951[电子电信—信号与信息处理]