Direction-of-Arrival Estimation Using a Low-Cost, Portable, Software-Defined-Radio-Based Phase Interferometry System [Education Corner]

Stevers, William; Schlegel, Anton; Chatterjee, Pratik; Opperman, Justin; Nanzer, Jeffrey A.

doi:10.1109/map.2019.2920052

Cited by 4 publications

(1 citation statement)

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“…The technique uses interferometric processing that can achieve fast and accurate measurements with a simple hardware architecture. Unlike many direction finding phase interferometry techniques, most of which are passive and only estimate the angles of emitting targets [16]- [18], our approach actively transmits a signal, thus it is possible to estimate the angle of any reflecting targets, not just emitting targets. However, because interferometric techniques can be ambiguous, we propose an approach to filter out the unwanted ambiguities by multiplying the responses from multiple baselines.…”

Section: Nanzer)mentioning

confidence: 99%

Millimeter-Wave Angle Estimation of Multiple Targets Using Space-Time Modulation and Interferometric Antenna Arrays

Vakalis,

Nanzer

2020

Preprint

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A new method of angle estimation of multiple targets using a distributed interferometric antenna array and wideband space-time modulation is presented in this work. Interferometric array measurements of angle of arrival are generally ambiguous in the presence of one or more targets. We propose a new method of mitigating ambiguities in interferometric measurements by multiplying the angle pseudo-spectra from multiple antenna baselines, resulting in detections at only the angles of the targets. Using a single linear frequency modulated (LFM) transmitter and a receive interferometric array with N elements we show a simple and computationally efficient technique to estimate the angle of up to O(N 2 ) targets. We describe the theory behind the technique, present detailed simulations, and an experimental verification using a three-element millimeter-wave measurement system.

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Section: Nanzer)mentioning

confidence: 99%