Capacity Optimized For Multicarrier OFDM-MIMO Antenna Systems

TL;DR

This paper analyzes the capacity behavior of MIMO-OFDM systems in broad-band fading environments, highlighting how delay spread channels can enhance capacity and diversity compared to flat-fading channels.

Contribution

It investigates the capacity of MIMO-OFDM systems with unknown channels at the transmitter, revealing advantages of delay spread channels over flat-fading channels.

Findings

Delay spread channels offer higher ergodic capacity than flat-fading channels.

MIMO delay spread channels provide greater diversity and multiplexing gains.

Delay spread can improve outage capacity in broad-band environments.

Abstract

Motivated by MIMO broad-band fading channel model, in this section we deals with the capacity behaviour of wireless MIMO and OFDM based spatial multiplexing systems in broad-band fading environments for the case where the channel is unknown at the transmitter and perfectly known at the receiver. This influence the propagation and system parameters on ergodic capacity, we furthermore demonstrate that, unlike the single-input single-output (SISO) case, delay spread channels may provide advantage over flat-fading channels not only in terms of outage capacity but also in terms of ergodic capacity. Therefore, MIMO delay spread channels will in general provide both higher diversity gain and higher multiplexing gain than MIMO flat-fading channels.