Abstract: In this work, we propose a new resource allocation scheme that increases the effect of diversity by considering the proportional fairness(PF) even after increasing the number of users in downlink MIMO-OFDMA-CDM (multiple input multiple output-orthogonal Frequency division multiple access-code division multiplexing)systems.In the proposed scheme resources are allocated for one subcarrier group and full code-spreading is done for each user using all sources allocated subcarriers.This increases the frequency diversity effect and also increases the multi-user diversity effect. Also the subcarrier allocation is based on the scheme which is not consider in based on the scheme which is not considered in the conventional OFDMA-CDM schemes. The proposed scheme is tested for 16 users. The improvement performances of BER and capacity are shown through MATLAB simulations.
Keywords: COFDM, frequency diversity, interference cancellation, SISO, spectral efficiency.
Title: Design and Evaluation of Resource Allocation Scheme for Downlink MIMO-OFDMA-CDM Systems
Author: S.JeneethSubashini, D Haripriya, Dr.Dhanasekaran.D
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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