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Angle-of-Departure-Aided Opportunistic Space-Division Multiple Access

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Author

  • Ghassan Dahman
  • Roshdy Hafez

Summary, in English

In this paper, a novel transmission technique for the multiple-input multiple-output (MIMO) broadcasting directional channels is introduced. During the training period, the base station sends a set of mutually orthogonal signals which enables each user to estimate the angle-of-departure of the anticipated strongest beam and the corresponding SNR. Then, the base station uses the reported angles-of-departure and SNRs to select a subgroup of users for data transmission in such a way that the sum capacity is maximized. Compared to the opportunistic space-division multiple access with beam selection algorithm, the advantage of the proposed algorithm is that it provides throughput gains up to 95% with low to medium number of users, under the same number of feedback bits. In addition to our new proposed algorithm, we introduce a modified version of the opportunistic space-division multiple access with beam selection algorithm, which shows a significant throughput improvement when evaluated using directional channel models such as WINNER.

Publishing year

2009

Language

English

Pages

146-152

Publication/Series

[Host publication title missing]

Document type

Conference paper

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • Angle-of-departure (AOD) estimation
  • beamforming
  • space-division multiple access (SDMA).

Conference name

Communication Networks and Services Research Conference, 2009. CNSR '09. Seventh Annual

Conference date

2009-05-11

Conference place

Moncton, NB, Canada

Status

Published

ISBN/ISSN/Other

  • ISBN: 978-0-7695-3649-1