Application of probing signals with zero autocorrelation zone for suppression of recurrent range interference in synthetic aperture radars

The problem of overlap of echo signals of adjacent probing cycles in synthetic aperture radars (SARs), called range ambiguity interference, or recurrent interference, is considered, which is usually solved by using orthogonal linear frequency modulated (chirp) and phase-code shift keyed (PCSK) in adjacent SAR probing cycles, which allows you to successfully suppress false signals from bright point targets from adjacent repetition periods. For SAR, various types of probing PCSK signals with a zero autocorrelation zone are considered, which make it possible to successfully solve the problem of suppressing recurrent interference from both point targets and extended objects. A comparative analysis of the correlation characteristics of orthogonal chirp and PCSK signals with various types of PCSK signals with a zero autocorrelation zone has been carried out.