A Receiver-Centric OFCDM Approach with Subcarrier Grouping

TL;DR

This paper introduces a receiver-centric OFCDM system with subcarrier grouping and 2D spreading, improving robustness and performance over classical methods in multiuser wireless communications.

Contribution

It presents a novel receiver-controlled subcarrier grouping technique with 2D spreading, enhancing channel gain utilization and system robustness.

Findings

Outperforms classical OFCDM in BER and outage probability

Improves frequency- and time-domain channel gain utilization

Demonstrates robustness in multiuser scenarios

Abstract

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.