Practical OFDMA in wireless networks with multiple transmitter-receiver pairs

Abstract

State-of-the-art physical layers such as OFDMA are widely used in infrastructure-based networks to enhance efficiency in one-to-many transmissions. Application to wireless mesh networks is highly promising, as the diversity increases in many-to-many scenarios. While theoretical work on OFDMA for this scenario exists, it has not yet been implemented in practice. In this demonstration, we show practical measurements of OFDMA in a topology with multiple transmitters and receivers, which represents a fully-connected segment of a mesh network. Moreover, we model our system analytically and in simulation. Our measurements show the validity of these models. We demonstrate over 90% reduction of the symbol error rate and a 29% channel capacity increase.