Distributed Beamforming Using One Bit of Feedback: AWGN Analysis

Conference: European Wireless 2012 - 18th European Wireless Conference 2012
04/18/2012 - 04/20/2012 at Poznan, Poland

Proceedings: European Wireless 2012

Pages: 4Language: englishTyp: PDF

Berbakov, Lazar; Antón-Haro, Carles; Matamoros, Javier (Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), Parc Mediterrani de la Tecnologia, Av. Carl Friedrich Gauss 7, 08860 Castelldefels, Spain)

In this paper, we analyze the impact of additive noise in the received signal strength (RSS) on the behavior of an iterative phase synchronization scheme for distributed beamforming. In particular, we derive an analytical expression which models the expected increase of the beamforming gain in such noisy scenarios. Furthermore, we show that noise prevents the algorithm from achieving full beamforming gain. We also assess, by means of computer simulations, the optimal number of RSS samples per iteration needed to attain the highest beamforming gain after convergence.