Phase improvement algorithm for NLFM waveform design to reduction of sidelobe level in autocorrelation function

Abstract

A phase improvement algorithm has been developed to design the non‐linear frequency modulated (NLFM) signal for the four windows of Raised‐Cosine, Taylor, Chebyshev, and Kaiser. The authors have already designed NLFM signal by stationary phase method (SPM). The simulation results for the peak sidelobe level of the autocorrelation function in the phase improvement algorithm reveal a significant average decrement of about 5 dB with respect to the stationary phase method. Moreover, to evaluate the efficiency of the phase improvement algorithm, the minimum error value for each iteration is calculated.