ROUTING IN MIMO WIRELESS X NETWORKS USING ALTERNATE RELAYING AND SIGNAL ALIGNMENT

Abstract

This thesis investigates the enhancement of Multiple-Input Multiple-Output (MIMO) wireless networks using an X-type topology with one-way data transfer. Originally limited to a half-duplex operation due to the constraints of a solitary relay, our re-search aims to enable full-duplex system functionality by introducing two half-duplex relays that operate in alternate time slots. Our approach to doubling the system throughput involves implementing advanced signal processing algorithms. A key innovation in our study is the application of virtual MIMO processing at the receivers, which combines opportunistic listening and relay transmissions into a unified process. This is achieved by doubling the number of receive antennas only at the receivers. We apply concepts from physical layer network coding and signal alignment, along-side specialized precoding methods, adapted for the two-relay setup. The integration of these advanced transceiver and relay strategies results in a comprehensive solution for enhancing bandwidth efficiency in wireless communication networks.