Experimental demonstration of retrodirective beamforming from a fully wireless distributed array

Ben Peiffer; Raghu Mudumbai; Sairam Goguri; Anton Kruger; Soura Dasgupta

doi:10.1109/MILCOM.2016.7795367

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Conference proceeding

Experimental demonstration of retrodirective beamforming from a fully wireless distributed array

Ben Peiffer, Raghu Mudumbai, Sairam Goguri, Anton Kruger and Soura Dasgupta

MILCOM 2016 - 2016 IEEE Military Communications Conference, pp.442-447

11/2016

DOI: 10.1109/MILCOM.2016.7795367

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Abstract

We report on recent results from our ongoing work on demonstrating retrodirective transmission from distributed arrays. Specifically, we describe a successful experimental demonstration of retrodirective beamforming to a non-cooperating receiver from an array of three distributed transceivers using (mostly) off-the-shelf hardware and simple and standard signal processing techniques. We build on our recently reported work that describes a synchronization procedure that allows the array nodes to estimate and compensate for the combined effects of frequency offsets and drifts in the oscillators as well as nonreciprocal elements in the transceiver hardware. We show how the array nodes that have performed the above synchronization process can then use an opportunistic incoming transmission from an external target to perform retrodirective beamforming back to that target without any coordination with that target. Our experimental results show beamforming gains greater than 90%. A key distinguishing feature of our work is that our procedure requires no wired links between the array nodes, no GPS, nor any other shared signal. To the best of our knowledge, this is the first ever demonstration of retrodirective beamforming from a fully wireless distributed array.

Antenna arrays

Array signal processing

Channel estimation

Frequency estimation

Synchronization

Wireless communication

Details

Title: Subtitle: Experimental demonstration of retrodirective beamforming from a fully wireless distributed array
Creators: Ben Peiffer - University of Iowa
Raghu Mudumbai - University of Iowa
Sairam Goguri - University of Iowa
Anton Kruger - University of Iowa
Soura Dasgupta - University of Iowa
Resource Type: Conference proceeding
Publication Details: MILCOM 2016 - 2016 IEEE Military Communications Conference, pp.442-447
DOI: 10.1109/MILCOM.2016.7795367
eISSN: 2155-7586
Publisher: IEEE
Language: English
Date published: 11/2016
Academic Unit: Electrical and Computer Engineering; Civil and Environmental Engineering
Record Identifier: 9984197090402771

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