多普勒频移对相位编码波形雷达信号处理的影响及其补偿问题(毕设最新版)

摘要

随着现代武器和现代飞行技术的发展，对雷达的作用距离、分辨率和测量精度的性能指标提出了越来越高的要求。脉冲压缩是现代雷达的一种重要体制，它很好的满足了雷达测距的要求，广泛应用于现代雷达中。相位编码信号是一种常用的脉冲压缩信号，它具有良好的抗干扰性和低频截获概率还具有高的速度和距离分辨率，但利用相位编码信号探测高速运动的物体时存在多普勒敏感性问题，不能很好的实现脉冲压缩，影响匹配滤波器的性能。

本文主要介绍和分析了多普勒频移对相位编码波形雷达信号处理的影响及其补偿问题。首先从脉冲压缩理论出发，简单介绍脉冲压缩的基本原理、匹配滤波器以及相位编码信号的脉冲压缩；接着讨论了相位编码信号的特点，并详细的分析了巴克码、m序列典型的二相编码信号及多普勒频移的影响；最后通过仿真分析了多普勒频移的影响及补偿办法。

关键词脉冲压缩；相位编码；多普勒频移；多普勒补偿

Abstract

With modern weapon and modern wingmanship being developed, the higher performance of the radar, such as action range, resolution, measure precision and so on, are required.Pulse compression is one of the most important systems in modern radars. Pulse compression effectively solves the contradiction between the range resolution and the average power of the radar, and is widely applied in modern radars.The phase encoding signal is one kind of commonly used pulse compression signal, it has the good anti-jamming and the low frequency acquisition probability also has the high speed and is away from the resolution, but using time phase encoding signal survey high speed movement object has the Doppler sensitive problem, cannot very good realize the pulse compression, affects matched filter's performance.

This article mainly introduced and has analyzed the Doppler shift to the phase encoding profile radar signal processing influence and the compensation question. First embarks from the pulse compression theory, introduces the pulse compression simply the basic principle, the matched filter as well as the phase encoding signal pulse compression; Then discussed the phase encoding signal characteristic, and detailed analysis Barke code, m sequence model two phase coded signal and Doppler shift influence; Finally, simulation analysis of the impact of Doppler frequency shift and compensation.

Key words Pulse compression Phase encoding Doppler effects Doppler compensation

目录

摘要..................................................................................................................... I Abstract .................................................................................................................. I I

第1章绪论 (5)

1.1 论文的研究背景和意义 (5)

1.2课题研究现状 (6)

1.3论文的主要工作 (7)

1.4论文的内容安排 (7)

第2章脉冲压缩的基本原理 (8)

2.1 概述 (8)

2.1.1 脉冲压缩原理 (8)

2.2 匹配滤波器 (10)

2.2.1 匹配滤波器信噪比 (10)

2.2.2 动目标匹配滤波器 (12)

2.3 相位编码信号及其脉冲压缩 (13)

2.3.1 相位编码信号 (13)

2.3.2 相位编码信号的脉冲压缩 (15)

2.4 本章小结 (18)

第3章相位编码信号 (19)

3.1 引言 (19)

3.2 模糊函数 (21)

3.2.1 模糊函数的定义及性质 (21)

3.2.2 典型模糊函数及其应用 (23)

3.3 相位编码序列 (24)

3.3.1 二相码 (24)

3.4 多相码 (28)

3.5 多普勒频移对相位编码影响 (30)

3.5.1 多普勒频移概述 (30)

3.5.2 多普勒频移对相位编码信号的影响 (31)

3.5.3 多普勒频移对相位编码信号影响仿真 (33)