tailieunhanh - Báo cáo hóa học: " Realization of a Spatially Multiplexed 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: Realization of a Spatially Multiplexed MIMO System | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article ID 78349 Pages 1-16 DOI ASP 2006 78349 Realization of a Spatially Multiplexed MIMO System David Samuelsson Joakim Jalden Per Zetterberg and Bjorn Ottersten Department of Signals Sensors and Systems Royal Institute of Technology KTH 100 44 Stockholm Sweden Received 14 December 2004 Revised 1 April 2005 Accepted 5 April 2005 Multi-antenna systems can provide improvements in wireless systems increasing spectral efficiency reliability range and system capacity. Herein we show how some of the potentials of MIMO systems can be realized on a simple radio hardware platform by utilizing advanced real-time signal processing and coding. We present a real-time implementation of a 2 by 2 MIMO system employing spatial multiplexing to achieve high spectral efficiency in an indoor non-line-of-sight environment operating in the 1800 MHz range. Well-known processing and coding techniques are employed and our contributions lie in discussing implemen-tational aspects and solutions often overlooked but critical for high-performance operation demonstrating the degree to which the simple baseband AWGN model can be used to accurately model predict the MIMO system on the current hardware and demonstrating the feasibility of real-time spatial multiplexing achieving up to 15bps Hz on a 2 by 2 system in a realistic indoor environment with off-the-shelf radio hardware. Copyright 2006 David Samuelsson 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. 1. INTRODUCTION Multiple antennas at the transmitter and receiver have emerged as one of the key technologies for increasing the spectral efficiency of future wireless communication systems. At this stage many of the theoretical aspects of the multiple-antenna channel are well .