In this letter, following a cross-layer design concept, we propose a novel subcarrier grouping technique for Orthogonal Frequency and Code Division Multiplexing (OFCDM) multiuser systems. We adopt a two dimensional (2D) spreading, so as to achieve both frequency- and time-domain channel gain. Furthermore, we enable a receiver-centric approach, where the receiver rather than a potential sender controls the admission decision of the communication establishment. We study the robustness of the proposed scheme in terms of the Bit-Error-Rate (BER) and the outage probability. The derived results indicate that the proposed scheme outperforms the classical OFCDM approach.
@article{arxiv.1302.4701,
title = {A Receiver-Centric OFCDM Approach with Subcarrier Grouping},
author = {Nikolaos I. Miridakis and Dimitrios D. Vergados and Emmanouil Papadakis},
journal= {arXiv preprint arXiv:1302.4701},
year = {2013}
}