Adaptive Rate and Power Allocation Schemes for OFDM/SDMA Systems

Behrouz Maham; Esrafil Jedari; Alireza Enayati

2nd International ICST Conference on Communications and Networking in China

Research Article

Adaptive Rate and Power Allocation Schemes for OFDM/SDMA Systems

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/CHINACOM.2007.4469446,
    author={Behrouz Maham and Esrafil Jedari and Alireza Enayati},
    title={Adaptive Rate and Power Allocation Schemes for OFDM/SDMA Systems},
    proceedings={2nd International ICST Conference on Communications and Networking in China},
    publisher={IEEE},
    proceedings_a={CHINACOM},
    year={2008},
    month={3},
    keywords={Bit error rate  Channel capacity  Communications technology  Multiaccess communication  OFDM  Power distribution  Receiving antennas  Resource management  Transmitters  Transmitting antennas},
    doi={10.1109/CHINACOM.2007.4469446}
}

Behrouz Maham
Esrafil Jedari
Alireza Enayati
Year: 2008
Adaptive Rate and Power Allocation Schemes for OFDM/SDMA Systems
CHINACOM
IEEE
DOI: 10.1109/CHINACOM.2007.4469446

Behrouz Maham¹^,*, Esrafil Jedari¹^,*, Alireza Enayati¹^,*

1: Communication Technologies Institute, Iran Telecommunication Research Center, Tehran, Iran

*Contact email: b.maham@ece.ut.ac.ir, e_jedari@itrc.ac.ir, enayati@itrc.ac.ir

Abstract

In this paper, adaptive resource allocation approaches, which jointly adapts power distribution and subcarrier allocation according to instantaneous channel conditions, is proposed for uplink OFDM/SDMA-based multiuser system. The first scheme utilizes adaptive algorithm to reduce symbol-error rate. The closed-form algorithm is derived for this idea. The second contribution in this paper deals with constant-rate transmissions over a spatial multiuser OFDM system. In the proposed system, the receiver jointly optimizes rate and power assignments for each user and then informs them to the transmitter via a low-rate feedback channels.

Keywords: Bit error rate Channel capacity Communications technology Multiaccess communication OFDM Power distribution Receiving antennas Resource management Transmitters Transmitting antennas

Published: 2008-03-07
Publisher: IEEE
Modified: 2011-07-14

: http://dx.doi.org/10.1109/CHINACOM.2007.4469446