LAUSR

Abstract The Chaotic Phase-modulated Linear Frequency modulation Short-range Detection System(CPLF-SrDS) is a new type of composite detection system. This composited system makes good use of the short-term randomness and long-term determinism of chaos, it has strong precision determination ability and anti-recognition ability. In order to solved the problem of precise distance determination of this system under the emphasized amplitude modulation(AM) interference, this paper proposed a signal denoising method based on singular spectrum decomposition and reconstruction. The singular value distribution characteristics of CPLF-SrDS echo and AM interference has been studied, and the size of the window length during singular spectral decomposition is also been optimized. The method of the paper realized the denoising of the echo detected by different AM interference, and recovered the echo from the doping interference. From the simulation results, this method can better realize the recovery of the echo signals in the case of lower JSR, and can well realized the anti-interference of the CPLF-SrDS.