Abstract
In this paper, we study a transmit beamforming technique for multiple input single output downlink multi-user systems with directional antennas where a transmit antenna gain is determined in three dimensional coordinates. For a multiuser active antenna system, beamforming designs to maximize the weighted sum rate are proposed by optimizing the transmit antenna gain and power allocation. Since finding joint optimal parameters requires prohibitively high computational complexity, we separate the optimization problem into two sub-problems of the vertical beamforming and the power allocation. Then a simple vertical beamforming algorithm based on a high signalto- noise ratio assumption is presented. Also, for a multi-user passive antenna system, we provide a beamforming scheme which employs a multi-sector concept. Simulation results show that the proposed beamforming schemes outperform the conventional beamforming schemes.
Original language | English |
---|---|
Title of host publication | 2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781479980888 |
DOIs | |
Publication status | Published - 2015 Jul 1 |
Event | 81st IEEE Vehicular Technology Conference, VTC Spring 2015 - Glasgow, United Kingdom Duration: 2015 May 11 → 2015 May 14 |
Publication series
Name | IEEE Vehicular Technology Conference |
---|---|
Volume | 2015 |
ISSN (Print) | 1550-2252 |
Other
Other | 81st IEEE Vehicular Technology Conference, VTC Spring 2015 |
---|---|
Country/Territory | United Kingdom |
City | Glasgow |
Period | 15/5/11 → 15/5/14 |
Bibliographical note
Publisher Copyright:© 2015 IEEE.
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics