雷达变脉宽脉冲串与接收失配滤波协同设计方法OA

Low-sidelobe waveforms are fundamental for ensuring the basic detection performance of radars.Designing waveforms with low sidelobes in the range dimension,the velocity dimension,or both,remains a major challenge in radar research.To address the issue of sidelobe suppression in the velocity dimension for coherent pulse trains,this paper proposes a joint design method of variable-pulse-width pulse trains and receive mismatched filtering.The proposed method uses a symmetric positive window function to directly construct both the pulse width sequence and the receive weighting sequence.As a result,the characteristics of the window function's amplitude spectrum,including low sidelobes and the broadening of the 3-dB mainlobe,are transferred into the mismatched filtering output of the coherent pulse train.Theoretical analysis shows that the proposed method incurs a smaller mismatched Signal-to-Noise Ratio(SNR)loss than when the window function is applied solely for receive mismatched filtering.The effects of window functions and the minimum pulse-width constraint on SNR loss and weak target detection performance under strong target interference are analyzed through simulations,illustrating the advantages of the proposed joint transceiver design method.