文档介绍：外文原文:
Rapid MIMO-OFDM Software Defined Radio
System Prototyping
Amit Gupta, Antonio Forenza, and Robert W. Heath Jr.
working munications Group
Department of Electrical puter Engineering, The University of Texas at Austin
1 University Station C0803, Austin, TX 78712-0240 USA
Phone: +1-512-232-2014, Fax: +1-512-471-6512
{agupta, forenza, rheath}***@
Abstract—Multiple input-multiple output (MIMO) is an attractive technology for future wireless systems. munication, enabled by the use of multiple transmit and multiple receive antennas, is known for its high spectral efficiency as
well as its robustness against fading and interference. Combining MIMO with orthogonal frequency division multiplexing (OFDM),it is possible to significantly reduce plexity as OFDM greatly simplifies equalization at the receiver. MIMO-OFDM is currently being considered for a number of developing wireless
standards; consequently, the study of MIMO-OFDM in realistic environments is of great importance. This paper describes an approach for prototyping a MIMO-OFDM system using a flexible software defined radio (SDR) system architecture in conjunction mercially available hardware. An emphasis on software permits a focus on algorithm and system design issues rather than implementation and hardware configuration. The penalty of this flexibility, however, is that the ease of es at the expense of overall throughput. To illustrate the benefits of the proposed
architecture, applications to MIMO-OFDM system prototyping and preliminary MIMO channel measurements are presented. A detailed description of the hardware is provided along with downloadable software to reproduce the system.
INTRODUCTION
Multiple-input multiple-output (MIMO) wireless systems use multiple transmit and multiple receive antennas to increase capacity and provide robustness to fading [1]. To obtain these benefits in broadband channels with extensive frequency selectivity,munication links plex space time equalizer