tailieunhanh - Báo cáo hóa học: " Design and Implementation of a DSP-Based MIMO System Prototype for Real-Time Demonstration and Indoor Channel Measurements"

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: Design and Implementation of a DSP-Based MIMO System Prototype for Real-Time Demonstration and Indoor Channel Measurements | EURASIP Journal on Applied Signal Processing 2005 16 2673-2685 2005 Hindawi Publishing Corporation Design and Implementation of a DSP-Based MIMO System Prototype for Real-Time Demonstration and Indoor Channel Measurements Raqibul Mostafa Ran Gozali Ramesh Chembil Palat Max Robert William G. Newhall Brian D. Woerner and Jeffrey H. Reed Mobile and Portable Radio Research Group Virginia Polytechnic Institute and State University 432 Durham Hall Mail Stop 0350 Blacksburg VA 24061 USA Emails ramostaf@ rgozali@ rchembil@ probert@ newhall@ reedjh@ Received 27 January 2004 Revised 28 February 2005 The design and implementation of the Virginia Tech Space-Time Advanced Radio VT-STAR a multiple antenna element spacetime ST processing prototype testbed is presented. The testbed is a research tool for comparing practical and theoretical performance metrics . throughput link reliability in different wireless channel conditions. The prototype builds around software-defined radio SDR concepts on a DSP platform and provides the flexibility to implement various forms of ST techniques. Different components of the system are described in detail including the software implementation I O schemes with custom hardware and data transfer mechanisms between the DSP and the host PC. Two different example realizations are presented a real-time demonstration and an offline measurement tool. Finally some representative measurement results obtained in indoor environments are presented. These results show VT-STAR to be a promising tool for performing MIMO experiments and generating channel measurements that can complement simulation studies in this area. Keywords and phrases space-time codes MIMO DSP C67 prototype wireless communications. 1. INTRODUCTION With the integration of Internet and multimedia applications in next-generation wireless communications the demand for reliable high-data-rate services is rapidly growing. The .