title   
  

Autofocused compressive SAR imaging based on the alternating direction method of multipliers

Güngör, Alper and Çetin, Müjdat and Güven, Emre H. (2017) Autofocused compressive SAR imaging based on the alternating direction method of multipliers. In: IEEE Radar Conference (RadarConf), Seattle, WA, USA

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Official URL: http://dx.doi.org/10.1109/RADAR.2017.7944458

Abstract

We present an alternating direction method of multipliers (ADMM) based autofocused Synthetic Aperture Radar (SAR) imaging method in the presence of unknown 1-D phase errors in the phase history domain, with undersampled measurements. We formulate the problem as one of joint image formation and phase error estimation. We assume sparsity of strong scatterers in the image domain, and as such use sparsity priors for reconstruction. The algorithm uses l(p)-norm minimization (p <= 1) [8] with an improvement by integrating the phase error updates within the alternating direction method of multipliers (ADMM) steps to correct the unknown 1-D phase error. We present experimental results comparing our proposed algorithm with a coordinate descent based algorithm in terms of convergence speed and reconstruction quality.

Item Type:Papers in Conference Proceedings
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
ID Code:33837
Deposited By:Müjdat Çetin
Deposited On:13 Sep 2017 11:16
Last Modified:13 Sep 2017 11:16

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