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http://dx.doi.org/10.7236/JIIBC.2018.18.6.75

SLNR-Based Precoder Design for Multiuser MIMO in Distributed Antenna Systems  

Seo, Bangwon (Division of Electrical, Electronic, and Control Engineering, the Institute of IT Convergence Technology (IICT), Kongju National University)
Publication Information
The Journal of the Institute of Internet, Broadcasting and Communication / v.18, no.6, 2018 , pp. 75-82 More about this Journal
Abstract
In this paper, we consider a precoder design for downlink multiuser multiple-input multiple-output (MU-MIMO) in distributed antenna systems (DAS). In DAS, remote radio heads (RRHs) are placed at geographically different locations within a cell area. Three different precoder design schemes are proposed to maximize the separate or joint signal-to-leakage-plus-noise ratio (SLNR) metrics by considering RRH sum power or per-RRH power constraints. The analytical closed-form form solution for each optimization problem is presented. Through computer simulation, we show that the joint SLNR based precoding schemes have better signal-to-interference-plus-noise ratio (SINR) and bit error rate (BER) performances than the separate SLNR based schemes. Also, it is shown that the precoding scheme with RRH sum power constraint has better performance than the precoding scheme with per-RRH power constraint.
Keywords
Distributed antenna systems; multiuser MIMO; precoder design; SLNR (Signal-to-Leakage plus Noise Ratio);
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