Delay Constrained Throughput Analysis of a Correlated MIMO Wireless Channel

• Published in: 2011 Proceedings of 20th International Conference on Computer Communications and Networks (ICCCN) pp. 1 - 7
• Main Authors: Mahmood, K., Vehkapera, M., Yuming Jiang
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.07.2011
• Series: IEEE International Conference on Computer Communications and Networks
• Subjects: Antennas; correlated multiple-input-multiple-output (MIMO); Delay; Delay constrained throughput; Fading; Markov modeling; Markov processes; MIMO; moment generating function (MGF); Multiplexing; stochastic network calculus; Throughput
• ISBN: 1457706377; 9781457706370; 9781457706387; 1457706385
• ISSN: 1095-2055; 2637-9430
• DOI: 10.1109/ICCCN.2011.6005936

The maximum traffic arrival rate at the network for a given delay guarantee (delay constrained throughput) has been well studied for wired channels. However, few results are available for wireless channels, especially when multiple antennas are employed at the transmitter and receiver. In this work, we analyze the network delay constrained throughput of a multiple input multiple output (MIMO) wireless channel with time-varying spatial correlation. The MIMO channel is modeled via its virtual representation, where the individual spatial paths between the antenna pairs are Gilbert-Elliot channels. The whole system is then described by a K-State Markov chain, where K depends upon the degree of freedom (DOF) of the channel. We prove that the DOF based modeling is indeed accurate. Furthermore, we study the impact of the delay requirements at the network layer, violation probability and the number of antennas on the throughput under different fading speeds and signal strength.