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Sensors 2011, 11(7), 7162-7177; doi:10.3390/s110707162

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

Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
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Received: 11 May 2011 / Revised: 4 July 2011 / Accepted: 5 July 2011 / Published: 12 July 2011
(This article belongs to the Section Physical Sensors)
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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. View Full-Text
Keywords: clutter; constant modulus waveform; radar waveform design; target detection clutter; constant modulus waveform; radar waveform design; target detection
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Gong, X.; Meng, H.; Wei, Y.; Wang, X. Phase-Modulated Waveform Design for Extended Target Detection in the Presence of Clutter. Sensors 2011, 11, 7162-7177.

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