Multiple Access Interference Cancellation and Link Multiplexing for MIMO Mesh Network

Wireless mesh networks, consist of mesh routers and clients, have attracted researchers in the field of sensor network or wireless plant control for its potential to achieve high connectivity and wide area coverage in an ad-hoc way. The mesh routers should supply the backbone of the network with high capacity to support accumulated traffic from or to mesh clients. In the conventional mesh network it is a biggest problem of inefficient network channel capacity due to multiple access interference among the mesh routers. In this paper we will propose a novel MIMO mesh network, where the mesh routers support multiple antennas, to avoid multiple access interference and to supply higher network capacity via link multiplexing. As a MIMO transmission scheme, linear (such as Zero-Forcing) and nonlinear (such as Dirty Paper Coding / Successive Interference Cancellation) MIMO algorithm are developed for the proposed mesh network. It is found from numerical analysis that the proposed MIMO mesh network achieves extremely higher channel capacity than that of conventional mesh network.