线性调频信号稀疏投影实现电路研究+电路图+PCB图

摘要雷达通常通过发射宽带或超宽带信号来提高分辨力。线性调频（LFM）脉冲信号是研究最早和应用最广的雷达信号形式，发射宽带LFM脉冲信号给雷达系统的信号采集和实时处理带来了巨大的压力。压缩感知理论基于信号在时频域和空间的稀疏性，应用于高分辨雷达信号处理，可解决宽带雷达数据采集与处理的难题。本文在研究基于压缩感知的雷达信号处理理论的基础上，针对2.4GHz载频宽带LFM脉冲信号雷达，研究一种物理实现技术—去斜处理（Stretch Processing）来实现LFM脉冲信号目标回波的压缩变换，通过数据仿真方法验证稀疏变换原理，并用实验验证了去斜电路和LFM脉冲信号雷达进行压缩感知处理的可行性。
关键词宽带信号线性调频脉冲信号稀疏性信号处理压缩感知去斜处理
毕业论文设计说明书外文摘要
Title The Research of Implementation Circuit about Linear
Frequency Modulation Signal Sparse Projection
Abstract
To improve the resolution, radar usually launch wideband or ultra-wideband signal.
Linear frequency modulation (LFM) pulse signal as the earliest research technology, has been widely applied. Launching wideband LFM pulse signal has brought great pressure to the signal acquisition and real-time processing of radar system. Compressive sensing based on the sparse signal in the time-frequency domain and space domain, applied to the high resolution radar signal processing, can solve the problem of wideband radar data acquisition and processing. This project have discussed radar signal processing based on Compression Sensing theory, aiming at wideband LFM pulse radar signal of 2.4GHz carrier frequency, and researched a physical implementation technology—Stretch Processing to realize the compression transformation of LFM pulse signal target echo. In the project, sparse transform principle has been verified by numerical simulation, and the results of experiments have verified Stretch Processing circuit and the feasibility of compressive sensing theory being applied to the LFM pulse radar signal.
Keywords Wideband Signal Linear Frequency Modulation Pulse Signal Sparsity Signal Processing Compressive Sensing Stretch Processing
目次
1 引言1
1.1 研究背景和意义1
1.2 研究历史和现状 1
1.3 本论文的主要内容和结构安排2
2 基于压缩感知的雷达信号处理 4
2.1 压缩感知理论概述 4
2.2 基于压缩感知的雷达信号处理5
3 线性调频脉冲信号实现稀疏变换7
3.1 线性调频脉冲信号表征7
3.2 去斜处理实现信号稀疏变换7
3.2.1 去斜处理信号模型8
3.2.2 去斜处理实现信号稀疏化证明9
3.3 MATLAB仿真与分析10
4 去斜处理电路实验12
4.1 MAX19996下变频混频器设计制作与效果测试12
4.1.1 Altium Designer10电路设计12
4.1.2 MAX19996下变频混频器制作13
4.1.3 MAX19996下变频混频器效果测试16
4.2 基于Agilent E8267D PSG信号源调试17
4.3 实验测试和结果分析18
5 思考与展望22
结论 23
致谢 24
参考文献25
图3.1 回波信号时域波形图10
图3.2 回波信号频谱图10
图3.3 输出信号时域波形图11
图3.4 输出信号频谱图11
图4.1 PCB制作流程图13
图4.2 MAX1999614
图4.3 电路原理图15
图4.4 PCB设计图16
图4.5 PCB实物图16
图4.6 混频效果图17
图4.7 LFM脉冲信号频谱图18
图4.8 实验场景图19 线性调频信号稀疏投影实现电路研究+电路图+PCB图:http://www.751com.cn/tongxin/lunwen_20562.html