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 Downlink Multicell Processing with Limited-Backhaul Capacity | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 840814 10 pages doi 2009 840814 Research Article Downlink Multicell Processing with Limited-Backhaul Capacity O. Simeone 1 O. Somekh 2 H. V. Poor 2 and S. Shamai Shitz 3 1 CWCSPR New Jersey Institute of Technology Newark NJ 07102 USA 2 Department of Electrical Engineering Princeton University Princeton NJ 08544 USA 3 Department of Electrical Engineering Technion Haifa 32000 Israel Correspondence should be addressed to O. Simeone Received 16 November 2008 Revised 7 March 2009 Accepted 18 May 2009 Recommended by Robert W. Heath Multicell processing in the form of joint encoding for the downlink of a cellular system is studied under the assumption that the base stations BSs are connected to a central processor CP via finitecapacity links finite-capacity backhaul . To obtain analytical insight into the impact of finite-capacity backhaul on the downlink throughput the investigation focuses on a simple linear cellular system as for a highway or a long avenue based on theWyner model. Several transmission schemes are proposed that require varying degrees of knowledge regarding the system codebooks at the BSs. Achievable rates are derived in closed-form and compared with an upper bound. Performance is also evaluated in asymptotic regimes of interest high backhaul capacity and extreme signal-to-noise ratio SNR and further corroborated by numerical results. The major finding of this work is that even in the presence of oblivious BSs that is BSs with no information about the codebooks multicell processing is able to provide ideal performance with relatively small backhaul capacities unless the application of interest requires high data rate . high SNR and the backhaul capacity is not allowed to increase with the SNR. In these latter cases some form of codebook information at the BSs becomes necessary. Copyright 2009 O. Simeone et al. This .
