tailieunhanh - Báo cáo hóa học: " Performance Evaluation at the System Level of Reconfigurable Space-Time Coding Techniques for HSDPA Kostas Peppas"

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: Performance Evaluation at the System Level of Reconfigurable Space-Time Coding Techniques for HSDPA Kostas Peppas | EURASIP Journal on Applied Signal Processing 2005 11 1656-1667 2005 Hindawi Publishing Corporation Performance Evaluation at the System Level of Reconfigurable Space-Time Coding Techniques for HSDPA Kostas Peppas Institute of Communication and Computer Systems National Technical University of Athens 9 Heroon Polytechniou 15773 Zografou Athens Greece Email peppas@ Angeliki Alexiou Wireless Research Bell Labs Lucent Technologies The Quadrant Stonehill Green Swindon SN5 7DJ UK Email alexiou@ Fotis Lazarakis Institute of Informatics and Telecommunications National Center for Scientific Research Demokritos Ag. Paraskevi 15310 Athens Greece Email flaz@ Tareq Al-Gizawi Institute of Communication and Computer Systems National Technical University of Athens 9 Heroon Polytechniou 15773 Zografou Athens Greece Email tarek@ Dimitrios I. Axiotis Institute of Communication and Computer Systems National Technical University of Athens 9 Heroon Polytechniou 15773 Zografou Athens Greece Email jaxiot@ Received 15 March 2004 Revised 15 December 2004 A reconfigurable space-time coding technique is investigated for a high-speed downlink packet access multiple-antenna network which combats the effects of antenna correlation. Reconfigurability is achieved at the link level by introducing a linear precoder in a space-time block coded system. The technique assumes knowledge of the long-term characteristics of the channel namely the channel correlation matrix at the transmitter. The benefits of the proposed reconfigurable technique as compared to the conventional non-reconfigurable versions are evaluated via system-level simulations. In order to characterize the system-level performance accurately and at the same time use a feasible approach in terms of computational complexity a suitable link-to-system interface has been developed. The average system throughput and the number of satisfied users are the performance metrics of .