Abstract
In this paper, we investigate the design of linear precoders for the multiple-input-multiple-output (MIMO) multiple access channel (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) expression for the weighted sum rate (WSR) of the MIMO MAC with finite alphabet inputs and Weichselberger's MIMO channel model. Subsequently, we obtain the optimal structures of the linear precoders of the users maximizing the asymptotic WSR and an iterative algorithm for determining the precoders. We show that the complexity of the proposed precoder design is significantly lower than that of MIMO MAC precoders designed for finite alphabet inputs and instantaneous CSI. Simulation results for finite alphabet signaling indicate that the proposed precoder achieves significant performance gains over existing precoder designs.
Recommended Citation
Y. Wu et al., "Linear Precoding for the MIMO Multiple Access Channel with Finite Alphabet Inputs and Statistical CSI," IEEE Transactions on Wireless Communications, vol. 14, no. 2, pp. 983 - 997, article no. 6924792, Institute of Electrical and Electronics Engineers, Jan 2015.
The definitive version is available at https://doi.org/10.1109/TWC.2014.2363105
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
Finite alphabet; linear precoding; MIMO MAC; statistical CSI
International Standard Serial Number (ISSN)
1536-1276
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Jan 2015
Comments
National Science Foundation, Grant 61222102