High resolution mono- and bistatic SAR imaging by using a novel modular Radar transmitter and multi-channel receiver system

该应用程序考虑了DFG项目“使用新型模块化雷达发射机和多通道接收机系统进行高分辨率单基地和双基地SAR成像”的延续。在项目的第一阶段，主要重点是开发噪声发射机系统、导航系统和校准设备，以及半静止SAR和ISAR配置中的信号处理，现在必须准备和执行机载单基地和双基地实验。采用新的硬件组件，SAR传感器一方面配备了比以前更大的信号带宽（>650 MHz）；另一方面，记录系统使数据在很长一段时间内（在分钟范围内，取决于占空比）连续流。因此，有许多新的可能的几何形状和构型可供选择和评估。新型发射机集成了任意波形发生器（AWG），可对噪声源交替开关。这首次实现了（低成本）噪声波形与具有相同参数和数据采集条件的标准雷达信号源的比较。项目的主要目标是完成包括噪声源和AWG在内的多通道SAR传感器的完成和标定。此外，不同的单基地和双基地SAR实验的计划和性能占用了大量的项目时间。这些实验证明了噪声技术在成像雷达上的可用性。个别问题，如任务规划和使用GNSS和IMU数据的数据融合将在这个项目部分得到解决。主要重点在于进一步发展多静态ISAR和SAR应用的算法，特别是考虑计算效率，对周围环境的精确测绘以及干涉和地形SAR的后期可用性。这还包括使用角反射器，应答器和地面真实位置测量的雷达数据的分析和校正。使用噪声或调频（经典）波形获得的SAR结果将进行分析和比较。该项目的继续进行将为锡根大学今后在使用强大的SAR传感器进行环境监测领域的新研究提供基础。在机载SAR应用中使用噪声源及其信号处理是SAR领域的创新。

This application considers the continuation of the DFG project "High resolution mono- and bistatic SAR imaging by using a novel modular radar transmitter and multi-channel receiver system". While in the first phase of the project the main focus was on the development of the noise transmitter system, the navigation system and the calibration devices as well as on the signal processing in half stationary SAR and on ISAR configurations, now the airborne mono- and bistatic experiments will have to be prepared and performed.Using new hardware components, the SAR sensor on the one hand is equipped with a larger signal bandwidth (>650 MHz) than before; on the other side the recording system is enabling the continuous streaming of data over a long period of time (in the minute range, depending on duty cycle). As a consequence there are a lot of new possible geometries and configurations to choose from and to evaluate. The new transmitter has an integrated arbitrary waveform generator (AWG), which can be switched on and off alternately to the noise source. This enables for the first time a comparison of the (low cost) noise waveform and a standard radar signal source having identical parameters and conditions for the acquisition of the data.The goals which are to be aimed during the project are the finishing and calibration of the multi-channel SAR sensor including noise source and AWG. Furthermore the planning and performance of the different mono- and bistatic SAR experiments take a lot of the intended project time. These experiments are necessary showing the usability of noise technology for imaging radar. Individual issues like mission planning and data fusion using GNSS and IMU data will have to be solved during this project part.The main focus lies on the further development of algorithms for multistatic ISAR and SAR applications, in particular looking at computational efficiency, precise mapping of the surroundings and later usability for interferometric and topographic SAR. This also comprises the analysis and correction of the radar data using corner reflectors, transponders and ground truth position measurements. The SAR results obtained by using noise or frequency modulated (classical) waveforms will be analyzed and compared.The continuation of the project will provide a basis for future novel investigations of the University of Siegen in the field of environmental monitoring using a powerful SAR sensor. The use of a noise source for airborne SAR applications and its signal processing is innovative for the SAR community.