(十三)MIT公开课雷达系统工程之波形与脉压

发布时间 2023-08-15 08:47:11作者: SymPny

0 写在前面

你不可能同时拥有春花和秋月,不可能同时拥有硕果和繁花,不可能所有的好处都是你的。你要学会权衡利弊,学会放弃一些什么,然后才可能得到些什么。你要学会接受命的残缺和悲哀,然后,心平气和。因为,这就是人生。 ——星云大师

1 雷达波形

脉冲调制连续:频谱与距离分辨率。

匹配滤波概念:匹配滤波器最大化峰值信噪比;对于矩形脉冲,匹配滤波器是一种简单的通带滤波器。

匹配滤波基础1:人们希望将接收到的雷达回波通过滤波器,滤波器的输出将优化信噪比(S/N);

匹配滤波基础2:

匹配过滤器–展望:

卷积执行匹配滤波:

2 脉冲压缩

2.1 基本介绍

脉冲压缩的动机:

Pulse Width, Bandwidth and Resolution for a Square PulseShorter Pulses have Higher Bandwidth and Better Resolution

Frequency and Phase Modulation of Pulses

2.2 线性调频信号

Linear FM Pulse Compression:正斜率。

Linear FM Pulse Compression:负斜率。

Range Doppler Coupling with FM WaveformsRange and Doppler measurements are coupled withFrequency modulated waveforms

Linear FM Pulse Compression Filters

Linear FM Pulse Compression by Digital Processing

Implementation Methods for LFM Pulse Compression

Reduction of Time (Range) Sidelobes

Narrowband Pulse Compression

Wideband Stretch Processing - Overview

Stretch Processing Example

Example of Stretch Processing

Implementation of Stretch Processing

Linear FM - Summary

2.3 相位编码信号

Binary Phase Coded Waveforms

Matched Filter

Example - 13 Bit Barker Code

Tapped Delay Line

Barker Codes

Range Sidelobe Comparison

2.4 其他编码波形

Linear Recursive Sequences(Shift Register Codes):

Quadriphase Codes

Polyphase (Frank) Codes

Costas Codes

Other Coded Waveforms

Summary

3 总结讨论

4 参考文献

[1] 百度翻译

[2] MIT 公开课: Radar Systems Engineering