Title :
Pilot coverage optimization for cellular network by joint beamforming of multiple sectors
Author :
Zhouyun Wu ; Aiping Huang ; Dongdong Fan ; Quek, Tony Q. S.
Author_Institution :
Inst. of Inf. & Commun. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
Pilot coverage optimization is an important issue in daily operation of cellular networks. It is difficult to meet the various coverage requirements in practice using existing framework such as adjusting antenna downtilts or transmit powers of sectors. In this paper, a novel coverage optimization method based on multi-sector joint beamforming is proposed to eliminate poor coverage and to minimize interference to the surrounding sectors. A heuristic algorithm is developed based on the iteration of sector coverage updating and antenna array excitation weights optimization. Numerical results show that the performance of our algorithm is superior to that of power exhaustion algorithm.
Keywords :
antenna arrays; array signal processing; cellular radio; interference suppression; iterative methods; minimisation; antenna array; cellular network; excitation weight optimization; heuristic algorithm; interference minimization; iteration algorithm; multisector joint beamforming; pilot coverage optimization; power exhaustion algorithm; sector coverage updating; joint beamforming; pilot coverage optimization; sector coverage updating; semidefinite relaxation;
Conference_Titel :
Wireless and Optical Communication Conference (WOCC), 2013 22nd
Conference_Location :
Chongqing
Print_ISBN :
978-1-4673-5697-8
DOI :
10.1109/WOCC.2013.6676367