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Adaptive Resource Allocation with Multiuser Interference Cancellation for MIMO OFDM Systems

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3 Author(s)
Gunaseelan, K. ; Dept. of ECE, PSG Coll. of Technol., Coimbatore, India ; Reba, P. ; Kandaswamy, A.

The challenging issue in multiuser MIMO-OFDM system is to cancel multi-access interference (MAI) when different users share the same subcarrier. Also, the presence of MAI makes the resource allocation problem very complicated. Hence it is essential to find the optimal transmit and receive weight vectors, to reduce MAI and to adaptively assign resources to meet the QoS requirements. In this paper, Block Diagonalization (BD) with Waterfilling power allocation is considered. This BD with Waterfilling power allocation algorithm increases the system capacity with zero MAI. In order to increase the system capacity further, BD with power and subcarrier allocation is proposed and analyzed their performance. The simulation results show that there is significant improvement in system capacity also guaranteeing zero MAI.

Published in:

2009 International Conference on Signal Processing Systems

Date of Conference:

15-17 May 2009

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