Measurement of time--varying Multiple--Input Multiple--Output Channels

TL;DR

This paper establishes a criterion for determining the measurability of time-varying MIMO channels based on their spreading support, aiding the design of high-capacity communication systems.

Contribution

It introduces a new criterion for the identifiability of MIMO channels considering their spreading support, advancing understanding of channel measurement in dynamic environments.

Findings

Derived a criterion for MIMO channel measurability

Linked channel support size to identifiability

Facilitates high-capacity communication in time-varying channels

Abstract

We derive a criterion on the measurability / identifiability of Multiple--Input Multiple--Output (MIMO) channels based on the size of the so-called spreading support of its subchannels. Novel MIMO transmission techniques provide high-capacity communication channels in time-varying environments and exact knowledge of the transmission channel operator is of key importance when trying to transmit information at a rate close to channel capacity.