A Threshold-Based Channel State Feedback Algorithm for Modern Cellular Systems

Authors:
V. Hassel;D. Gesbert;M. -S. Alouini;G. E. Oien
Affiliations:
Norwegian Univ. of Sci. & Technol., Trondheim;-;-;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2007

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Abstract

In this paper we propose a channel state feedback algorithm that uses multiple feedback thresholds to reduce the number of users transmitting feedback to a minimum. The users are polled with lower and lower threshold values and only the users that are above a threshold value transmit feedback to the base station. We show how this feedback algorithm can be used for any scheduling algorithm and show how closed-form expressions for the optimal threshold values can be obtained for two well-known scheduling algorithms. Finally, we propose a two-step optimization procedure for optimizing the feedback algorithm for real-life cellular standards.