Energy-Efficient Interference-Aware Precoding for the Downlink of Multi-Cell Multi-User MIMO Systems

Héliot, F., Sambo, Y. A. and Imran, M. A. (2014) Energy-Efficient Interference-Aware Precoding for the Downlink of Multi-Cell Multi-User MIMO Systems. In: 2014 European Conference on Networks and Communications (EuCNC), Bologna, Italy, 23-26 Jun 2014, ISBN 9781479952809 (doi: 10.1109/EuCNC.2014.6882646)

Abstract

Energy efficiency (EE) is fast becoming a key performance indicator for designing future wireless communication systems. Equally, precoding/power allocation has proved to be very effective for improving the spectral efficiency (SE) of multi-user (MU) multi-input multi-output (MIMO) communication systems. In a multi-cell environment, other-cell interference (OCI) degrades both the SE and EE performances of the system. We design here an energy efficient OCI-aware precoding/power allocation algorithm for the downlink of MU-MIMO systems by relying on regularized channel inversion and considering a realistic multi-antenna power consumption model. The performance of our proposed scheme is assessed both in presence and absence of OCI and results demonstrate the effectiveness of our approach for mitigating OCI. In addition, results show that our approach improves the EE of the system by saving transmit power in comparison with a traditional SE-based precoding/power allocation approach.

• Item Type: Conference Proceedings
• Additional Information: The research leading to these results has received funding from the European Commission’s Seventh Framework Programme FP7/2007-2013 under grant agreement n◦318273- project LEXNET.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sambo, Dr Yusuf and Imran, Professor Muhammad
• Authors: Héliot, F., Sambo, Y. A., and Imran, M. A.
• College/School: College of Science and Engineering > School of Engineering; College of Science and Engineering > School of Engineering > Systems Power and Energy
• ISBN: 9781479952809
• Copyright Holders: Copyright © 2014 IEEE
• First Published: First published in 2014 European Conference on Networks and Communications (EuCNC)
• Publisher Policy: Reproduced in accordance with the publisher copyright policy