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Báo cáo hóa học: " Research Article Decentralising Multicell Cooperative Processing: A Novel Robust Framework"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Decentralising Multicell Cooperative Processing: A Novel Robust Framework | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID 890685 10 pages doi 10.1155 2009 890685 Research Article Decentralising Multicell Cooperative Processing A Novel Robust Framework Agisilaos Papadogiannis 1 Eric Hardouin 1 and David Gesbert2 1 Orange Labs 38-40 rue du General Leclerc 92794 Issy les Moulineaux France 2Eurecom 2229 route des Cretes BP 193 06904 Sophia-Antipolis France Correspondence should be addressed to Agisilaos Papadogiannis apapadogiannis@gmail.com Received 28 January 2009 Accepted 17 April 2009 Recommended by Dmitri Moltchanov Multicell cooperative processing MCP has the potential to boost spectral efficiency and improve fairness of cellular systems. However the typical centralised conception for MCP incurs significant infrastructural overheads which increase the system costs and hinder the practical implementation of MCP. In Frequency Division Duplexing systems each user feeds back its Channel State Information CSI only to one Base Station BS . Therefore collaborating BSs need to be interconnected via low-latency backhaul links and a Control Unit is necessary in order to gather user CSI perform scheduling and coordinate transmission. In this paper a new framework is proposed that allows MCP on the downlink while circumventing the aforementioned costly modifications on the existing infrastructure of cellular systems. Each MS feeds back its CSI to all collaborating BSs and the needed operations of user scheduling and signal processing are performed in a distributed fashion by the involved BSs. Furthermore the proposed framework is shown to be robust against feedback errors when quantized CSI feedback and linear precoding are employed. Copyright 2009 Agisilaos Papadogiannis et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly .