Linear MIMO precoding in jointly-correlated fading multiple access channels with finite alphabet signaling

Wu Y, Wen CK, Xiao C, Gao X, Schober R (2014)

Publication Language: English

Publication Type: Conference contribution

Publication year: 2014

Event location: Sydney, NSW AU

ISBN: 978-1-4799-2003-7

DOI: 10.1109/ICC.2014.6884164

Abstract

In this paper, we investigate the design of linear precoders for multiple-input multiple-output (MIMO) multiple access channels (MAC). We assume that statistical channel state information (CSI) is available at the transmitters and consider the problem under the practical finite alphabet input assumption. First, we derive an asymptotic (in the large-system limit) weighted sum rate (WSR) expression for the MIMO MAC with finite alphabet inputs and general jointly-correlated fading. Subsequently, we obtain necessary conditions for linear precoders maximizing the asymptotic WSR and propose an iterative algorithm for determining the precoders of all users. In the proposed algorithm, the search space of each user for designing the precoding matrices is its own modulation set. This significantly reduces the dimension of the search space for finding the precoding matrices of all users compared to the conventional precoding design for the MIMO MAC with finite alphabet inputs, where the search space is the combination of the modulation sets of all users. As a result, the proposed algorithm decreases the computational complexity for MIMO MAC precoding design with finite alphabet inputs by several orders of magnitude. Simulation results for finite alphabet signalling indicate that the proposed iterative algorithm achieves significant performance gains over existing precoder designs, including the precoder design based on the Gaussian input assumption, in terms of both the sum rate and the coded bit error rate.

Authors with CRIS profile

Yongpeng Wu Lehrstuhl für Digitale Übertragung Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

National Sun Yat-sen University TW Taiwan (TW) Lehigh University US United States (USA) (US) Southeast University / 东南大学 CN China (CN)

How to cite

APA:

Wu, Y., Wen, C.-K., Xiao, C., Gao, X., & Schober, R. (2014). Linear MIMO precoding in jointly-correlated fading multiple access channels with finite alphabet signaling. In IEEE (Eds.), Proceedings of the 2014 IEEE International Conference on Communications (ICC). Sydney, NSW, AU.

MLA:

Wu, Yongpeng, et al. "Linear MIMO precoding in jointly-correlated fading multiple access channels with finite alphabet signaling." Proceedings of the 2014 IEEE International Conference on Communications (ICC), Sydney, NSW Ed. IEEE, 2014.

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