Range Sidelobe Level Reduction With a Train of Diverse LFM Pulses

Abstract

Target masking is a pervasive problem in radar signal processing: the range sidelobes of the waveform's matched filter response may cause a strong target to prevent the detection of nearby weaker targets. Common solutions to sidelobe level reduction for frequency modulated waveforms result in an SNR loss. In this correspondence, we propose a novel method using pulse diversity to reduce the range sidelobes while avoiding SNR loss. The proposed approach is based on shaping the power spectrum of the summation of a train of constant-amplitude linearly frequency modulated pulses to resemble a Gaussian function. We present a numerical example demonstrating a drastic sidelobe level reduction. Importantly, our approach avoids any processing SNR loss.

High-Resolution Wideband Waveform Design for Sonar Based on Multi-Parameter Modulation

“…There were also some methods to solve the problem of high-range sidelobe in the desired region. According to the time-frequency hopping sequence shift [15], modulated signal diversity operation [16] and optimization algorithms are under constraints [17,18] to achieve sidelobe suppression,but the above algorithmic design process requires the establishment of an optimization model that satisfies specific time-frequency conditions or constraints. Consequently, the algorithms become more complicated.…”