Downlink Performance Analysis of Distributed Antenna Systems with Linear Precoding
- https://doi.org/10.2991/icmmita-15.2015.148How to use a DOI?
- DAS; linear precoding; optimal precoding
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.
- © 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/).
Cite this article
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 - https://doi.org/10.2991/icmmita-15.2015.148 ID - Song2015/11 ER -