Ping-Pong Beam Training with Hybrid Digital-Analog Antenna Arrays

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In this article we propose an iterative training scheme that approximates optimal beamforming between two transceivers equipped with hybrid digital-analog antenna arrays. Inspired by methods proposed for digital arrays that exploit algebraic power iterations, the proposed training procedure is based on a series of alternate (ping-pong) transmissions between the two devices over a reciprocal channel. During the transmissions, the devices updates their digital beamformers by conjugation and normalization operations on the received digital signal, while the analog beamformers are progressively updated by a simple "beam split and drop" strategy that tracks the directions from which signals with largest magnitude are being received. The resulting scheme has minimal computational complexity and converges with only a handful of iterations. As shown in the numerical assessment, the method approximates the top singular mode of the channel, hence performing very closely to optimal beamforming.
Titel2017 IEEE International Conference on Communications (ICC)
Antal sider7
Publikationsdatomaj 2017
ISBN (Elektronisk)978-1-4673-8999-0
StatusUdgivet - maj 2017
BegivenhedIEEE ICC 2017 Wireless Communications Symposium: Bridging People, Communities, and Cultures - Paris, Frankrig
Varighed: 21 maj 201725 maj 2017


KonferenceIEEE ICC 2017 Wireless Communications Symposium
NavnIEEE International Conference on Communications

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