Distributed Generalized Wirtinger Flow for Interferometric Imaging on Networks. Issue 13 (2022)

• Record Type: Journal Article
• Authors: Farrell, Sean M.; Veeraraghavan, Ashok; Sabharwal, Ashutosh; Uribe, César A.
• Is Part Of: IFAC-PapersOnLine. Volume 55:Issue 13(2022)
• Page Start: 258
• Page End: 263
• Publication Date: 2022
• Subjects: Interferometric imaging -- Wirtinger flow -- nonconvex optimization; Automatic control -- Periodicals; 629.805
• DOI: 10.1016/j.ifacol.2022.07.269
• Languages: English
• ISSNs: 2405-8963

Abstract

Abstract: We study the problem of decentralized interferometric imaging over networks, where agents have access to a subset of local radar measurements and can compute pair-wise correlations with their neighbors. We propose a primal-dual distributed algorithm named Distributed Generalized Wirtinger Flow (DGWF). We use the theory of low rank matrix recovery to show when the interferometric imaging problem satisfies the Regularity Condition, which implies the Polyak-Łojasiewicz inequality. Moreover, we show that DGWF converges geometrically for smooth functions. Numerical simulations for single-scattering radar interferometric imaging demonstrate that DGWF can achieve the same mean-squared error image reconstruction quality as its centralized counterpart for various network connectivity and size.