Optimal Operating Point in MIMO Channel for Delay-Sensitive and Bursty Traffic

We consider a system with a bursty and delay-sensitive data source to be transmitted over a constant-rate MIMO channel with no CSI information at the transmitter. Given the diversity-multiplexing tradeoff region of the MIMO channel, we find the optimal multiplexing rate that optimizes the end-to-end loss probability. Based on the effective bandwidth model of the source, we present an analytical tradeoff between the error probability over the MIMO channel and the probability of delay violation. We illustrate the optimal operating points for i.i.d. sources and Markov-modulated sources and show the relation between sources burstiness, delay bound, and optimal multiplexing rate