Oversampled PTM Sequencing for Sidelobe Suppression in Radar

Detecting fast moving targets by radar has become an issue due to Doppler shift in the frequency of the return signal. This issue attracted the research community to enhance the quality of detection in radar system. Current literature is mainly focusing to increase the power spectral density of the main lobe, which also minimizes the effect of sidelobes to some extent. However, the effect of sidelobes still exists, which makes detection very difficult at all Doppler shifts. Most of the existing research assumed Doppler filter bank followed by range gates to detect the range and speed of the targets. In this paper, we pay much attention to present oversampling PTM sequencing for sidelobe suppression which is a better solution than earlier methods to remove the effect of sidelobes over large extent by creating windows at regular Doppler frequencies to enhance detection. The detection of the targets will be done in range through the Doppler windows giving excellent signal-to-noise ratio. The transmission code may be oversampled to get the requested Doppler clearance.