Rate adaptation in MIMO antenna selection system with imperfect CSIT

Authors:
T. R. Ramya;Srikrishna Bhashyam
Affiliations:
Department of Electrical Engineering, IIT Madras, Chennai, India;Department of Electrical Engineering, IIT Madras, Chennai, India
Venue:
COMSNETS'10 Proceedings of the 2nd international conference on COMmunication systems and NETworks
Year:
2010

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Abstract

In this paper, we analyze the performance of an adaptive Multiple Input Multiple Output (MIMO) system employing transmit antenna selection and rate adaptation based on channel state information (CSI). Imperfections in CSI due to estimation error and feedback delay are considered. Since CSI is imperfect, the rate of transmission is chosen in order to meet a target outage probability. The average throughput is evaluated for various cases of imperfect CSI using Monte Carlo simulations. Simulation results show that rate adaptation provides significant gains even with imperfect CSI. Furthermore, prediction can be used to effectively combat the effect of feedback delay.