Precoding for Uplink Distributed Antenna Systems with Transmit Correlation in Rician Fading Channels

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Xiangbin Yu
  • Shu-Hung Leung
  • Weiye Xu
  • Jiaheng Wang
  • Xiaoyu Dang

Detail(s)

Original languageEnglish
Article number7987054
Pages (from-to)4966-4979
Journal / PublicationIEEE Transactions on Communications
Volume65
Issue number11
Online published20 Jul 2017
Publication statusPublished - Nov 2017

Abstract

In this paper, we develop an optimal precoder and a suboptimal precoder for uplink distributed antenna systems with transmit correlation over Rician channels. The objective is to minimize a pairwise error probability (PEP) with constrained transmit power. The optimal scheme uses an efficient projection-based steepest descent algorithm to obtain the Gram matrix of the precoder, while the suboptimal scheme exploits the eigen-structure of the Gram matrix to obtain its unitary matrix (beamforming) and eigenvalues (power control). For a given beamforming (BF), an efficient power adaptation based on a fuzzy signal-to-noise ratio (SNR) is developed. The PEP analysis at low SNR is used to obtain a suboptimal BF. The derived BF and the fuzzy power adaptation have closed-form expressions that make the suboptimal scheme computationally efficient in comparison with existing methods. The BF can be re-optimized via the Riemannian steepest descent method to further reduce the PEP. Simulation results show that the proposed optimal scheme not only gives the performance the same as the existing optimal scheme when the latter can converge, but it also has lower computational complexity and faster convergence. Moreover, the suboptimal scheme can give a nearly optimal error rate.

Research Area(s)

  • non-Kronecker spatial correlation, precoding, Rician channel, statistical channel information, Uplink distributed antenna systems

Citation Format(s)

Precoding for Uplink Distributed Antenna Systems with Transmit Correlation in Rician Fading Channels. / Yu, Xiangbin; Leung, Shu-Hung; Xu, Weiye; Wang, Jiaheng; Dang, Xiaoyu.

In: IEEE Transactions on Communications, Vol. 65, No. 11, 7987054, 11.2017, p. 4966-4979.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review