tailieunhanh - Báo cáo hóa học: "Editorial MIMO Transmission with Limited Feedback"

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: Editorial MIMO Transmission with Limited Feedback | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 518950 2 pages doi 2008 518950 Editorial MIMO Transmission with Limited Feedback Markus Rupp 1 Ana I. Perez-Neira 2 David Gesbert 3 and Christoph F. Mecklenbrauker1 1 Institute of Communications and Radio-Frequency Engineering Vienna University of Technology Gusshausstrasse 25 389 1040 Vienna Austria 2 Department of Signal Theory and Communications Technical University of Catalonia North Campus Jordi Girona 1-3 08034 Barcelona Spain 3Eurecom Institute 2229 Route des Cretes BP 193 06904 Sophia Antipolis Cedex France Correspondence should be addressed to Markus Rupp mrupp@ Received 20 February 2008 Accepted 20 February 2008 Copyright 2008 Markus Rupp 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 cited. During the past decade multiple-antenna transmission MIMO systems have matured. However when comparing their potential capacities with their achieved throughputs we notice large gaps. The price for the MIMO advantages is increased cost for the transceiver hardware and antenna subsystems combined with high algorithmic complexity in baseband processing and protocols. For instance water filling and power loading do not seem feasible due to the large amount of required channel state information. State-of-the-art systems with MIMO enhancements like 3G cellular networks WiMax and WLAN support very limited feedback only. Nevertheless adaptive modulation and coding AMC schemes selective space-time coding as well as antenna selection have shown that significant improvements are achievable even with very limited feedback. In this setting MIMO-OFDM schemes are of central interest to industry and academia. For instance an important challenge is to find an adequate representation of the MIMO .