Research On Signal Process And Display System Of Time Division Multiple Channel Perspective Radar

Wall perspective radar can detect the targets behind the walls. The radar detects the targets by emitting electromagnetic waves which can penetrate opaque obstacles such as walls. In this thesis, the wall perspective radar is a time division multiple channel radar, which uses an array of two transmitting antennas and eight receiving antennas. The two transmitting antennas emit stepping frequency ultra-wideband signals in a division time. As the radar emits stepping frequency ultra-wideband signals, it has a high range resolution. Besides, the radar has a high orientation resolution because of the large radar aperture.In this thesis, a data processing and control system based on a time division multiple channel perspective radar was carried out with the following main tasks:1. Aiming at the structures and imaging algorithms of the time division multi-channel radar system, this paper analyzed the system requirements and functional specifications as well as proposed two data processing and display control programs. One is a processing and display and control system based on DSP + ARM. The other is wireless terminals based on WIFI + processing and display and control system.2. For two data processing and display control programs, the FPGA-based pre-processing modules are designed. The pre-processing modules implement the interfaces with data and control commands of the radar front-end data acquisition system. Through analysis and indicators of pre-processing module, the chip selection, circuit design, PCB board production and FPGA programming are completed. Debugging FPGA pre-processing circuit board and programs, make sure that it can provide radar data to WIFI module and the preprocessed data can be passed on to the DSP for processing.3. According to the requirements of the program one, the DSP+ARM embedded processing and display control device is completed. The DSP software configuration, the BP algorithm transplant on DSP, the ARM interface driver design and application programming interfaces are also completed. Through the joint debugging, the imaging of a single moving target detection of a single wall is realized with the imaging frame rate is about six frames per second.4. Note that the radar operators will have a certain impact on the results of radar detection, control personnel need to be hidden so that the design of the program two is completed. The application of WIFI module is designed, and the transparent transmission of WIFI module data is realized. The wireless terminal data processing and the display control PC program are completed. After the experiment and debugging, the wireless terminal is connected with the WIFI module of the range radar system in the range of 10 m, and the data of the radar is received and processed. Radar data processing and display frame rate is 25 frames per second.