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A downlink beamforming assisted by locally positioned communication devices
Author(s) -
You Cheolwoo,
Jung YoungHo,
Cho Sunghyun
Publication year - 2014
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.2592
Subject(s) - computer science , telecommunications link , beamforming , base station , simple (philosophy) , interference (communication) , key (lock) , wireless , scheme (mathematics) , computer network , cellular network , small cell , distributed computing , telecommunications , channel (broadcasting) , philosophy , mathematical analysis , computer security , mathematics , epistemology
SUMMARY Recently, multiple cell types with overlapping coverage have been deployed simultaneously to increase cellular network capacity. Cross‐tier interference is one of the key technical challenges in the use of this method. A simple and practical beamforming scheme assisted by locally positioned communication devices for the downlink of a multi‐cell wireless hierarchical cell structure system is proposed in this paper to maximize the capacity of the embedded small cell and simultaneously ensure minimal impact on the performance of existing macrocells. The locally positioned communication devices can be implemented with low complexity and at low cost and can continuously provide helpful and accurate information to base stations for the proper configuration of geographical cell coverage, allowing neighboring cells to cooperate effectively with each other. Simulation results verify that the proposed scheme can provide a significant gain over conventional systems not using the proposed algorithm. Copyright © 2013 John Wiley & Sons, Ltd.