A Resource Allocation Scheme for Multiuser MIMO/OFDM Systems with Spatial Grouping

Chun-Ye LIN  Yung-Fang CHEN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.4   pp.1006-1015
Publication Date: 2011/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.1006
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
resource allocation,  multiple input multiple output (MIMO),  orthogonal frequency division multiplexing (OFDM),  space division multiple access,  multi-access interference,  

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Summary: 
A resource allocation scheme for multi-access MIMO-OFDM systems in uplink was developed to improve power and spectrum efficiency in the frequency and the space domains [1]. The scheme requires a multi-user detector in the receiver and assumes identical spatial crosscorrelation across all subcarriers for any pair of spatially separable users. However, the multi-user detection device may not exist in the receiver and the identical spatial crosscorrelation assumption may not be valid in some operational scenarios. The paper develops a scheme to remedy these problems for multi-access MIMO-OFDM systems without using multi-user detection techniques and the assumption. The proposed scheme aims at minimizing the total user transmit power while satisfying the required data rate, the maximum transmit power constraint, and the bit error rate of each user. The simulation results are presented to demonstrate the efficacy of the proposed algorithm.