Downlink Performance Analysis of Distributed Antenna Systems with Linear Precoding

DOI

10.2991/icmmita-15.2015.148How to use a DOI?

Keywords

DAS; linear precoding; optimal precoding

Abstract

Distributed antenna system (DAS) has emerged as a promising architecture for future mobile communications. Compared with collocated antenna system (CAS), DAS has advantages in reducing transmission power and improving the cell coverage area. In this paper, the downlink performance of DAS with linear precoding is analyzed. The optimization problem of minimizing the total transmitted power while satisfying signal-to-interference-and-noise ratio (SINR) constraints is studied to optimize the beamforming for all user jointly, which can be solved by conic optimization method. However, the problem is non-convex and can not be solved efficiently. Suboptimal methods are proposed by optimizing power allocation after given the direction of precoding. In simulation, the performance of different linear precoding methods are analyzed for the downlink of DAS. Moreover, the performance of DAS and CAS are also compared with the same antenna configuration and direction of precoding. It is shown that compared with CAS, DAS achieves the same performance with much less transmission power.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Chuanlei Song
AU  - Pengcheng Zhu
AU  - Jiamin Li
PY  - 2015/11
DA  - 2015/11
TI  - Downlink Performance Analysis of Distributed Antenna Systems with Linear Precoding
BT  - Proceedings of the 2015 3rd International Conference on Machinery, Materials and Information Technology Applications
PB  - Atlantis Press
SP  - 786
EP  - 792
SN  - 2352-538X
UR  - https://doi.org/10.2991/icmmita-15.2015.148
DO  - 10.2991/icmmita-15.2015.148
ID  - Song2015/11
ER  -