Feature Extraction And Visualization Of The Radar Data

Recently, with the development of radar technology, especially the use of high-resolution radar, radar has been widely used not only in the military, but also in the topographic mapping, exploration and other civilian areas. High-resolution radar imaging and radar target recognition has become an important branch of radar technology research.The post-processing of two-dimension radar data is the focus of this study. In this paper, based on the original data, the target signature is extracted and visualized.In the section of theoretical analysis, this paper introduces the basic concepts such as the radar target signature and radar imaging. And on the assumption that the radar system is a linear system, the conclusion can be deduced that post processing of the sequence of RCS can obtain radar imaging data. The algorithm of one-dimensional range profile is derived by stepped frequency signal and implemented by code. This algorithm can be divided into zero-padding, windowing, IFFT. By the resulting image of the algorithm, factors influencing the results of one-dimensional are discussed. The principle of two-dimensional imaging is introduced and achieved. Then, the resulting graphic of two-dimensional imaging is displayed.In the section of visual characterization, the paper focuses on the development of the two-dimensional radar data processing software GridPro, and radar image processing software PsPlus.The function of GridPro, which is developed by the C++programming language, Qt development framework and based on Windows Operation System, is displaying two-dimensional radar data in table and achieving the algorithm of one-dimensional range profile and two-dimensional imaging. GridPro achieves the analysis and import of the data files, the data preprocessing (dimension reduction, data statistic, data smooth and so on) and the range profile (one-dimensional range profile and two-dimensional imaging). All functions of the software have been completed and the software has been put into use.The PsPlus software mainly completes the batch processing of radar images. It uses the C++programming language and the MFC GUI development framework. It achieves the image flipping, cropping, synthesis, adjusting brightness and other image processing functions. These operations can be batch completed. This software has also been put into use.These two processing software, which provide an effective tool for radar data processing, eliminate the need for a lot of manual operations and establish foundation for the extraction of radar target signature and object recognition.