JOURNAL OF COMMUNICATIONS (JCM)
ISSN : 1796-2021
Volume : 4    Issue : 1    Date : February 2009

Resource Allocation in Downlink MIMO-OFDMA with Proportional Fairness
Bin Da and Chi Chung Ko
Page(s): 8-13
Full Text:
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Abstract
A new scheme for MIMO-OFDMA (Multiple Input Multiple Output - Orthogonal Frequency Division
Multiple Access) downlink resource allocation is presented in this paper. It has an objective of
maximizing the total system capacity while having constraints on the total available power and
proportional fairness. Dominant eigen-channels obtained from MIMO state matrix are used to
formulate this scheme with low complexity. It gives a tradeoff strategy among system capacity,
computational complexity and proportional fairness. Simulation results show that this new adaptive
allocation scheme can provide much better capacity gain than static allocation methods while
achieve near optimal fairness of rate distribution with a linear complexity. As a result, it may be
suitable for fulfilling diverse QoS requirements of MIMO-OFDMA systems.

Index Terms
adaptive resource allocation, SISO/MIMOOFDMA, diverse QoS requirements