Uplink/Downlink Duality in Multi-Cell MU-MIMO Systems with Hardware Impairments

Zarei S, Gerstacker W, Schober R (2016)

Publication Language: English

Publication Type: Conference contribution

Publication year: 2016

Event location: München DE

ISBN: 978-3-8007-4177-9

Abstract

In this paper, we propose an uplink/downlink duality framework for multi-cell multi-user multiple-input multiple-output (MU-MIMO) systems with residual hardware impairments (HWIs) at the base station and the user terminals. By employing the proposed uplink/downlink duality framework, complex downlink optimization problems can be transformed to equivalent dual uplink problems which are easier to solve. Thereby, for the same total transmit power, the same per-user signal-to-interference-plus-noise ratios (SINRs) are achieved in downlink and uplink. We apply the proposed uplink/downlink duality, and derive a multi-cell HWI aware minimum mean square error (MCHWA-MMSE) precoder. Our simulation results show that the proposed MCHWA-MMSE precoder achieves a substantially higher sum rate than conventional MMSE and conjugate beamforming precoders.

Authors with CRIS profile

Shahram Zarei Lehrstuhl für Digitale Übertragung Wolfgang Gerstacker Lehrstuhl für Digitale Übertragung Robert Schober Lehrstuhl für Digitale Übertragung

How to cite

APA:

Zarei, S., Gerstacker, W., & Schober, R. (2016). Uplink/Downlink Duality in Multi-Cell MU-MIMO Systems with Hardware Impairments. In VDE (Eds.), Proceedings of the WSA 2016; 20th International ITG Workshop on Smart Antennas. München, DE.

MLA:

Zarei, Shahram, Wolfgang Gerstacker, and Robert Schober. "Uplink/Downlink Duality in Multi-Cell MU-MIMO Systems with Hardware Impairments." Proceedings of the WSA 2016; 20th International ITG Workshop on Smart Antennas, München Ed. VDE, 2016.

BibTeX: Download