title: Phase-modulated waveform design for extended target detection in the presence of clutter.
abstract: The problem to be addressed in this paper is a phase-modulated waveform design for the detection of extended targets contaminated by signal-dependent noise (clutter) and additive noise in practical radar systems. An optimal waveform design method that leads to the energy spectral density (ESD) of signal under the maximum signal-to-clutter-and-noise ratio (SCNR) criterion is introduced first. In order to make full use of the transmission power, a novel phase-iterative algorithm is then proposed for designing the phase-modulated waveform with a constant envelope, whose ESD matches the optimal one. This method is proven to be able to achieve a small SCNR loss by minimizing the mean-square spectral distance between the optimal waveform and the designed waveform. The results of extensive simulations demonstrate that our approach provides less than 1 dB SCNR loss when the signal duration is greater than 1 μs, and outperforms the stationary phase method and other phase-modulated waveform design methods.
authors.affiliation: Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. gongxh07@mails.tsinghua.edu.cn
authors.forename: Xuhua
authors.initials: X
authors.lastname: Gong
authors.forename: Huadong
authors.initials: H
authors.lastname: Meng
authors.forename: Yimin
authors.initials: Y
authors.lastname: Wei
authors.forename: Xiqin
authors.initials: X
authors.lastname: Wang