FPGA implementation of back projection algorithm for radar imaging

The growing security concerns worldwide have lead to the development of wideband radar systems to estimate the position and shape of objects behind barriers. For an accurate reconstruction of the scene of interest, a huge amount of measurements are required. Thus wideband signals with large array apertures are required to generate high resolution images. This paper describes how the raw data is processed using back-projection algorithm in order to reconstruct a 2-D image with the help of FPGA. It also deals with the practical advantages of back projection algorithm compared to other beamforming algorithms. The raw data is generated using stepped frequency continuous wave radar.