Single-pixel Polarimetric Direction of Arrival Estimation using Programmable Coding Metasurface Aperture

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a single-pixel polarimetric compressive sensing (CS)-based direction of arrival (DoA) estimation technique using a cavity backed programmable coding metasurface aperture. The single-pixel DoA retrieval technique relies on a dynamically modulated waveform diversity, enabling spatially incoherent radiation masks to encode the incoming plane waves on the radar aperture using a single channel. The polarimetric nature of the wave-chaotic coding metasurface ensures that DOA estimation considers the sensitivity of the structure to the polarization state of the incoming waves. We show that the polarimetric single-pixel DoA concept can be enabled by encoding the polarization information of the incoming waves at the physical layer level within the antenna. A dynamically reconfigurable wave-chaotic metasurface, that possesses a structured sparsity of dual-polarized coded metamaterial elements, is proposed for the proof of concept. It is also shown that by encoding and compressing the source generated far-field incident waves into a single channel using spatio-temporal incoherent measurement modes generated by the coded programmable metasurface, we can retrieve high fidelity polarimetric DoA information from compressed measurements.
Original languageEnglish
Number of pages22
JournalScientific Reports
DOIs
Publication statusAccepted - 01 Dec 2021

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