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http://dx.doi.org/10.7840/KICS.2011.36A.11.861

Cyclic Codebook Scheme for Coordinated Scheduling and Beamforming  

Kim, Seong-Hyun (연세대학교 무선네트워크 연구실)
Lee, Sang-Hoon (연세대학교 무선네트워크 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.11A, 2011 , pp. 861-869 More about this Journal
Abstract
In this paper, we propose coordinated scheduling and beamforming based on limited feedback to overcome the effects of inter-cell interference in multi-cell environment. The goal of this study is to improve a performance of cell-edge area significantly affected by the inter-cell interference and also to guarantee a performance of the entire system. Existing coordinated scheduling and beamforming based on the perfect channel state information generates an overhead for the channel state information feedback and exchange at the users and base stations, respectively. In this study, first we propose a novel codebook to obtain a null space of an interference channel efficiently which can be used to reduce the inter-cell interference. Using the proposed codebook, we propose coordinated scheduling and beamforming to improve the performance of cell-edge area and the entire system. Through the proportional fair scheduling, the performance of the proposed technique is shown as improvement of channel capacity for users located cell-edge area and entire system.
Keywords
Quality-of-service;
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