Performance of MIMO Channel Models with Channel State Information at the Transmitter

The performance benefits of multiple input multiple output (MIMO) antenna systems in increasing the throughput of a communication system depends on the type and quality of the information sent to the transmitter. In this paper, we examine the loss in throughput due to a delay in receiving information at the transmitter. Specifically, we examine the impact on the throughput when the channel has a delayed channel matrix estimate, as well as when delayed channel statistical information is provided. Additionally, the effect of both delayed transmit and receiver channel state information is explored. The performance is examined using measured data in several environments. Two analytical channel models are synthesized using parameters estimated from the measured data. The usefulness of the analytical models in predicting the same performance when delays are present is then explored.