摘要脉冲压缩是广泛应用于现代雷达中的一种先进技术，它合理地解决了雷达距离分辨力与平均功率之间的矛盾，并在现代雷达中得到广泛应用。特别是具有近似于图钉形状的模糊图的二相编码信号，其脉冲压缩非常容易实现，因而被广泛关注。可是，距离旁瓣效应制约了相位编码信号脉冲压缩在实际中的应用。因此，如何抑制雷达的旁瓣成为相位编码信号脉冲压缩是否能够得到更好的应用的关键问题。63592

    本文主要介绍和分析了相位编码信号的脉冲压缩及其旁瓣抑制技术。首先从脉冲压缩基本原理出发，综述了脉冲压缩的特点及其实现方法;讨论了相位编码信号的特点，并详细分析了巴克码、m序列、MAC码等典型的二相码信号。接着对二相编码信号的旁瓣抑制技术进行了分析和研究，分别采用二阶锥规划法，窗函数加权法，LP线性规划法和改进的LMS算法设计了13位巴克码的旁瓣抑制滤波器，并用Matlab进行了相应的仿真测试。最后，使用VHDL硬件描述语言，针对13位巴克码失配滤波器的设计，完成了旁瓣抑制滤波器系统的FPGA实现。

毕业论文关键词  脉冲压缩  二相编码信号  旁瓣抑制滤波器  线性规划  凸优化  LMS算法  FPGA 

毕业设计说明书（论文）外文摘要

Title          Design of the sidelobe suppression   filter                                 

Abstract  Pulse compression is an advanced technology widely used in modern radar, it effectively solves the contradiction between the radar range resolution and the average power, and is widely used in modern radar. Especially the fuzzy approximation to pin the BPSK signal with pulse compression, and it is easy to implement, and thus has been widely used. However, the actual distance sidelobe limits the application of phase coded signal pulse compression. Therefore, how to better sidelobe suppression phase coded pulse compression signals has become a key problem in the application .

   This paper introduces and analyzes the phase coded signal pulse compression and sidelobe suppression technology. First, by the pulse compression basic theory, reviews the characteristics of pulse compression and implementation method thereof; and discusses the characteristics of phase coded signal, and a detailed analysis of the two-phase Barker code, m sequence, MAC codes and other typical code signal. Then the binary phase coded signal sidelobe suppression technology is analyzed and studied, using the two order cone programming method, weighted window function method, the LMS algorithm of LP linear programming method and the improved design of 13 Barker code sidelobe suppression filter, and the simulation test with corresponding Matlab. Finally, the use of VHDL hardware description language, based on 13 bit Barker code mismatched filter design, implement FPGA sidelobe suppression filter system.

Keywords  pulse compression  binary phase-coded signal  sidelobe suppression filter  LP  convex optimization  LMS  algorithm  FPGA

  目   次

1 绪论 1

1.1 研究背景 1

1.2 国内外研究动态 2

1.3 论文主要工作及内容安排 4

2 相位编码信号特性研究 5

2.1 雷达回波的“点目标”数学模型 5

2.2 模糊函数 7

2.2.1 模糊函数的定义