Study On Digital Radar Signal Processing

Pulse compression technology can solve the conflict between the range resolution and the distance of radar detection, but many sidelobes will appear after the compression of echo signals. If the sidelobes are taller, the weak signals of the near units will be submerged. This will result in the degradation of the radar detection performance. This paper presents a sidelobe suppression method based on LMS algorithm and window function modified algorithm. By simulation, this method can effectively suppress the sidelobes.The clutter inevitably exists in the radar echoes, if the amplitude of the clutter is taller than that of target signal, the target signal will be submerged in the clutter, this will result in the degradation of radar performance, so the clutter suppression is a more important part of the radar signal processing. This paper provides a method of clutter suppression whose name is AMTI based on Doppler phase compensation in the absence of clutter map and cancellation coefficients. This method is mainly used to suppress moving clutter, it can improve the performance of radar in detecting the moving targets submerged in moving clutter. By simulation, the AMTI based on Doppler phase compensation can effectively suppress the moving clutter and detect the target submerged in the clutter, it also effectively suppress the moving clutter in the case that there is only moving clutter.In this paper, the ADSP-TS101 chip and its software for development are used to achieve the pulse compression, fixed targets cancellation, adaptive clutter cancellation and non-coherent accumulation.