摘要空间作战在当代战争中的地位越来越重要。一旦丢失制空权,战争局势将受到严重影响。雷达作为空间侦察的重要手段,在战争中的地位极其重要。随着现代飞行技术的突飞猛进,科技力量越来越强,对雷达的作用距离、分辨力性能要求更高。脉冲压缩雷达信形式,能有效地解决距离和分辨力之间的矛盾,被广泛应用于现代雷达中。
本文主要介绍了二相编码信号脉冲压缩及其旁瓣抑制的技术。先介绍“点目标”回波模型和模糊函数,分析巴克码、m序列、和MAC序列三种二相编码的相关性、模糊图等特性,总结三种二相码的应用场合。接着研究了巴克码旁瓣抑制的方法:线性规划法(LP)和最小二乘(LS)法,采用这两种方法设计旁瓣抑制滤波器和失配滤波器,达到较好的旁瓣抑制效果。最后基于FPGA针对巴克码设计了失配滤波器,同时进行了性能测试,结果表明该失配滤波器达到设计指标要求。21358
关键词 脉冲压缩 二相码 旁瓣抑制 最小二乘LS 线性规划 FPGA
毕业论文设计说明书(论文)外文摘要
Title Phase-encoded signal pulse compression technology researchand its implementation
Abstract
ait fighting are more and more important in the current conflicts.once lose the control of the air,the war situatian will be completely influenced.Radar being the important detective role is very important in the war.With the development of new wingnmship technology ,the higher performance of the radar such as action range,resolution and so on are needed. Pulse compression technology can solve the contradiction of action range and measure precision.so it has a widely use in new radar area.
This article mainly analyzed the Two-phase encoded signal pulse compression and sidelobe suppression techniques.Firstly,analyzed“point target”echo model and the Barke code、m sequence、MAC sequence.Draw their characteristics,and compared their applycation occasion.Then analyzed for the two-phase encoder sidelobe suppression methods: LP and LS method, using these two methods designed to achieve side lobe suppression filter sidelobe suppression effect, and compared the simulation results.Finally, Finally, based on FPGA design for the Barker code mismatch filter,the performance test results show that the mismatch filte achieve the design requirements.
Keywords:pulse compression, Two-phase code,side-lobe suppression,
LS,Linear Programming,FPGA
目 次
1 绪论 1
1.1研究背景 1
1.2论文的主要内容和安排 3
2 相位编码信号研究 4
2.1点目标回波模型分析 4
2.2模糊函数和模糊图 5
2.3相位编码信号的模糊函数 7
2.4二相码序列分析 8
2.5本章小结 13
3 脉冲压缩的常用实现方法 14
3.1脉冲压缩的实现方法分类 14
3.2时域法 14
3.3频域快速卷积法 15
4 旁瓣抑制技术 17
4.1旁瓣抑制技术概述 17
4.2基于LP法的巴克码旁瓣抑制 18
4.3基于最小二乘(LS)法的巴克码旁瓣抑制 26
5 FPGA实现研究 33
5.1实现工具分析 33
5.2实现流程 33
5.3旁瓣抑制滤波器基于IP Core的FPGA实现 34
5.4本章小结 37
结论 38 FPGA相位编码信号脉冲压缩及其实现技术研究:http://www.751com.cn/tongxin/lunwen_13526.html