Joint Transmit and Receive Beamforming for Multi-Relay MIMO-OFDMA Cellular Networks

TL;DR

This paper proposes a new joint transmit and receive beamforming protocol for multi-user, multi-relay MIMO-OFDMA cellular networks, enhancing capacity through effective channel decomposition and innovative grouping algorithms.

Contribution

It introduces a novel transmission protocol with joint beamforming and channel grouping algorithms for improved network capacity in MIMO-OFDMA systems.

Findings

Effective MISO channel decomposition enhances spatial multiplexing.

Novel grouping algorithms improve capacity-performance trade-offs.

Protocol outperforms traditional methods in simulations.

Abstract

A novel transmission protocol is conceived for a multi-user, multi-relay, multiple-input--multiple-output orthogonal frequency-division multiple-access (MIMO-OFDMA) cellular network based on joint transmit and receive beamforming. More specifically, the network's MIMO channels are mathematically decomposed into several effective multiple-input--single-output (MISO) channels, which are spatially multiplexed for transmission. For the sake of improving the attainable capacity, these MISO channels are grouped using a pair of novel grouping algorithms, which are then evaluated in terms of their performance versus complexity trade-off\footnote{This paper concisely focuses on the transmission protocol proposed in our previous work [1]. For more details, please refer to [1].}.