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Journals & Magazines >Proceedings of the IEEE >Volume: 92 Issue: 2

An overview of MIMO communications - a key to gigabit wireless

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A.J. PAULRAJ; D.A. GORE; R.U. NABAR; H. BOLCSKEI
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Abstract:

High data rate wireless communications, nearing 1 Gb/s transmission rates, is of interest in emerging wireless local area networks and home audio/visual networks. Designi...Show More

Metadata

Abstract:

High data rate wireless communications, nearing 1 Gb/s transmission rates, is of interest in emerging wireless local area networks and home audio/visual networks. Designing very high speed wireless links that offer good quality-of-service and range capability in non-line-of-sight (NLOS) environments constitutes a significant research and engineering challenge. Ignoring fading in NLOS environments, we can, in principle, meet the 1 Gb/s data rate requirement with a single-transmit single-receive antenna wireless system if the product of bandwidth (measured in hertz) and spectral efficiency (measured in bits per second per hertz) is equal to 10/sup 9/. A variety of cost, technology and regulatory constraints make such a brute force solution unattractive, if not impossible. The use of multiple antennas at transmitter and receiver, popularly known as multiple-input multiple-output (MIMO) wireless, is an emerging cost-effective technology that offers substantial leverages in making 1 Gb/s wireless links a reality. The paper provides an overview of MIMO wireless technology covering channel models, performance limits, coding, and transceiver design.
Published in: Proceedings of the IEEE ( Volume: 92, Issue: 2, February 2004)
Page(s): 198 - 218
Date of Publication: 08 November 2004

ISSN Information:

DOI: 10.1109/JPROC.2003.821915
References is not available for this document.
Contents

I. Introduction

High data rate wireless communications, nearing 1-Gb/s transmission rates, is of interest in emerging wireless local area networks (WLANs) and home audio/visual (A/V) networks. Currently, WLANs offer peak rates of 10 Mb/s, with 50–100 Mb/s becoming available soon. However, even 50 Mb/s is inadequate when faced with the demand for higher access speeds due to the increase in rich media content and competition from 10-Gb/s wired LANs. Additionally, future home A/V networks will be required to support multiple high-speed high-definition television (HDTV) A/V streams, which again demand near 1-Gb/s data rates. Another challenge faced by WLANs and home A/V environments as well as outdoor wireless wide area network (WWAN) systems for fixed/nomadic access is non-line-of-sight (NLOS) propagation, which induces random fluctuations in signal level, known as fading.

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