【雷达与对抗】【2017.05】基于软件无线电的步进频探地雷达

本文为美国乔治亚理工学院（作者：Samuel C. Carey）的硕士论文，共70页。

 

本研究探讨软件无线电（SDR）作为探地雷达（GPR）平台的潜力。SDR是一种快速发展的技术，它部分或全部在软件中实现信号处理组件，与传统的硬件无线电相比，它提供了增强的设计灵活性[。步进频探地雷达法用于探测、定位地下金属和非金属物体。多音信号允许在500 - 5000兆赫波段每次扫描150兆赫。本文对该系统进行了扩展，以隔离、处理调制散射体的反射。开发了一个由发射天线和接收天线组成的演示样机，每副天线指向地面，通过同轴电缆连接到现成的SDR单元。SDR单元通过以太网电缆连接到主机，主机使用开源软件库控制系统。SDR通常是为通信应用而设计的，因此在远程遥感的应用需要特别考虑。最初的设计挑战与灵活性及硬件多功能性的潜在优势必须相互权衡。

 

This research explores the potential of software defined radio (SDR) as a platform for ground-penetrating radar (GPR). SDR is a rapidly developing technology that implements signal processing components partially or completely in software, providing enhanced design flexibility over traditional hardware radio [1]. The stepped-frequency GPR method is used to detect and locate metallic and non-metallic subsurface objects. A multi-tone signal allows the 500-5000 MHz band to be scanned 150 MHz at-a-time. This system is extended to isolate and process the reflections of modulated scatterers. A demonstration prototype is developed, consisting of a transmitting antenna and a receiving antenna, each pointed at the ground and connected via coaxial cable to an off-the-shelf SDR unit. This SDR unit is connected via ethernet cable to a host computer, which controls the system using opensource software libraries. SDR is typically designed for communications applications, so special consideration is necessary for remote sensing. Initial design challenges are weighed against potential advantages of design flexibility and hardware versatility.

 

 

1 引言与项目背景

1.1 探地雷达

1.2 软件定义无线电

1.3 软件定义的探地雷达

2 技术方法

2.1 系统回顾、目标与需求

2.2 硬件平台

2.3 频段覆盖

2.4 信号设计

2.5 同步问题

2.6 时间调度

2.7 增益稳定性

2.8 调制散射体

2.9 软件

2.10 FPGA加速

3 设计结果

3.1 基本测量结果

3.2 GPR测量结果

3.3 时序

4 项目在理论上的扩展

4.1 其它实时配置问题

4.2 多极化问题

4.3 GPS

4.4 高级调制散射的应用

4.5 运动检测

5 结论

附录A 实验设备 

完整资料领取请加QQ群免费下载：