Throughput maximizing FIR filterbank for MIMO LTI wireline channels

Abstract

There is an ever growing need for higher speed communications over existing wireline plant. To achieve even higher throughput, bonding and joint optimization of multiple-input-multiple-output cable bundles attracted attention recently. In this paper we first explain a technique which allows several users to use the same communication medium while at the same time allowing their transmission to be separated at the receiver. This technique would handle single-channel-multiple-users case. The technique is then extended to handle multiple input multiple output (MIMO) channel by jointly optimizing the transmit filters to maximize the throughput over the MIMO channel. This optimization is suitable for multiple-channels-single-user and multiple-channels-multiple-users cases. A 2-D MIMO channel example is given and simulation results show that the joint optimization achieves higher throughput than independent optimization for each channel.