Low-Complexity MIMO Precoding for Finite-Alphabet Signals

Wu Y, Wing Kwan Ng D, Wen CK, Schober R, Lozano A (2017)

Publication Language: English

Publication Type: Journal article

Publication year: 2017

Journal

IEEE Transactions on Wireless Communications Institute of Electrical and Electronics Engineers (IEEE)

Book Volume: 16

Pages Range: 4571 - 4584

Journal Issue: 7

DOI: 10.1109/TWC.2017.2700308

Abstract

This paper investigates the design of precoders for single-user multiple-input multiple-output (MIMO) channels, and, in particular, for finite-alphabet signals. Based on an asymptotic expression for the mutual information of channels exhibiting line-of-sight components and rather general antenna correlations, precoding structures that decompose the general channel into a set of parallel subchannel pairs are proposed. Then, a low-complexity iterative algorithm is devised to maximize the sum mutual information of all pairs. The proposed algorithm significantly reduces the computational load of existing approaches with only minimal loss in performance. The complexity savings increase with the number of transmit antennas and with the cardinality of the signal alphabet, making it possible to support values thereof that were unmanageable with existing solutions. Most importantly, the proposed solution does not require instantaneous channel state information (CSI) at the transmitter, but only statistical CSI.

Authors with CRIS profile

Robert Schober Lehrstuhl für Digitale Übertragung (IDC)

Involved external institutions

Universitat Pompeu Fabra (UPF) ES Spain (ES) National Sun Yat-sen University TW Taiwan (TW) University of New South Wales (UNSW) AU Australia (AU) Shanghai Jiao Tong University / 上海交通大学 CN China (CN)

How to cite

APA:

Wu, Y., Wing Kwan Ng, D., Wen, C.-K., Schober, R., & Lozano, A. (2017). Low-Complexity MIMO Precoding for Finite-Alphabet Signals. IEEE Transactions on Wireless Communications, 16(7), 4571 - 4584. https://doi.org/10.1109/TWC.2017.2700308

MLA:

Wu, Yongpeng, et al. "Low-Complexity MIMO Precoding for Finite-Alphabet Signals." IEEE Transactions on Wireless Communications 16.7 (2017): 4571 - 4584.

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