tailieunhanh - Báo cáo hóa học: "SABA: A Testbed for a Real-Time MIMO System"

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: SABA: A Testbed for a Real-Time MIMO System | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article ID 56061 Pages 1-15 DOI ASP 2006 56061 SABA A Testbed for a Real-Time MIMO System Daniel Borkowski 1 Lars Bruhl 2 Christoph Degen 1 Wilhem Keusgen 3 Gholamreza Alirezaei 1 Frank Geschewski 1 Christos Oikonomopoulos 1 and Bernhard Rembold1 1 Institute of High Frequency Technology RWTH Aachen University Melatener Strafe 25 52056 Aachen Germany 2 Telefunken Radio Communication Systems GmbH Co. KG 89075 Ulm Germany 3 Fraunhofer Institute for Telecommunications Heinrich-Hertz Institute Einsteinufer 37 10587 Berlin Germany Received 6 December 2004 Revised 4 August 2005 Accepted 22 August 2005 The growing demand for high data rates for wireless communication systems leads to the development of new technologies to increase the channel capacity thus increasing the data rate. MIMO multiple-input multiple-output systems are best qualified for these applications. In this paper we present a MIMO test environment for high data rate transmissions in frequency-selective environments. An overview of the testbed is given including the analyzed algorithms the digital signal processing with a new highly parallel processor to perform the algorithms in real time as well as the analog front-ends. A brief overview of the influence of polarization on the channel capacity is given as well. Copyright 2006 Hindawi Publishing Corporation. All rights reserved. 1. INTRODUCTION AND MOTIVATION The increasing demand for high data rates for wireless communication requires efficient use of the available bandwidth. Multiple-input multiple-output MIMO systems provide exploitation of spatial diversity and or spatial multiplexing and enables SDMA space division multiple access . These systems comprise on the one hand point-to-point MIMO systems where both at the transmitter and the receiver site antenna arrays are used on the other hand also multiuser MIMO systems with a multiantenna base station or .