Phase-Modulated Waveform Design for Extended Target Detection in the Presence of Clutter

Sensors

Xuhua Gong²  Huadong Meng¹  Yimin Wei² 

[1] Department of Electronic Engineering, Tsinghua University, Beijing 100084, China;

关键词: clutter;    constant modulus waveform;    radar waveform design;    target detection;   

DOI  :  10.3390/s110707162

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.