Distributed transmit beamforming: Performance improvement using a two-bit feedback scheme

Wayes Tushar, David B. Smith, Walid Saad, H. Vincent Poor

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In this paper a distributed transmit beamforming technique is proposed for time-varying wireless communication channels that improves the signal gain at the receiving terminal, and thus yielding an enhanced signal-to-interference- plus-noise ratio. In this regard, a two-bit feedback algorithm, with considerable gains in terms of received signal strength (RSS), is proposed for optimizing the phase synchronization of signals beamformed from distributed transmitters towards a moving receiver. It is shown that the proposed scheme can successfully capture the impact of time-varying wireless channels on the transmitted signals with reasonable accuracy such that an improved RSS is achieved at the receiver. Numerical experiments show that the proposed two-bit feedback scheme achieves an improved average RSS of about 37.9% and 29.7%, relative to the existing one-bit scheme and the improved one-bit feedback scheme respectively. Results also show that the proposed scheme requires a significantly reduced number of antennas to achieve an RSS equivalent to that of the one-bit feedback schemes.

Original languageEnglish (US)
Title of host publication2012 International Symposium on Communications and Information Technologies, ISCIT 2012
Pages492-496
Number of pages5
DOIs
StatePublished - Dec 1 2012
Event2012 International Symposium on Communications and Information Technologies, ISCIT 2012 - Gold Coast, QLD, Australia
Duration: Oct 2 2012Oct 5 2012

Publication series

Name2012 International Symposium on Communications and Information Technologies, ISCIT 2012

Other

Other2012 International Symposium on Communications and Information Technologies, ISCIT 2012
CountryAustralia
CityGold Coast, QLD
Period10/2/1210/5/12

Keywords

  • Distributed beamforming
  • phase synchronization
  • received signal strength
  • space-time communication
  • time-varying channels

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems

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  • Cite this

    Tushar, W., Smith, D. B., Saad, W., & Poor, H. V. (2012). Distributed transmit beamforming: Performance improvement using a two-bit feedback scheme. In 2012 International Symposium on Communications and Information Technologies, ISCIT 2012 (pp. 492-496). [6380949] (2012 International Symposium on Communications and Information Technologies, ISCIT 2012). https://doi.org/10.1109/ISCIT.2012.6380949