Space Division Multiple Access for Wireless Local Area Networks / Edition 1

by Patrick Vandenameele, Marc Engels, Liesbet Van Der Perre

Overview

Wireless Local Area Networks (WLANs) are experiencing a growing importance recently. Whereas WLANs were primarily used for niche applications in the past, they are now deployed as wireless extensions to computer networks. The increase of the datarates from 2 Mbps up to 11 Mbps for roughly a constant price has played a major role in this breakthrough. As a consequence, an even greater success can be envisioned for the more recent OFDM-based WLAN standards in the 5 GHz band that offer up to 54 Mbps. At IMEC we have realized this potential already several years ago and have established a successful research program on OFDM-based WLAN. The program resulted in an operational prototype of a 5 GHz OFDM system. The longer term goals of this program are to extend the indoor range of the WLAN systems up to 100 m and to increase the capacity above 100 Mbps. Driven by these goals, Patrick embarked on the usage of multiple antenna techniques and, more in particular, Space Division Multiple Access (SDMA) for WLAN as the topic for his doctoral research. During this research, key contributions were made towards making SDMA for WLAN a reality. To name a few: A basic scheme for combining OFDM and SDMA was proposed. Also realistic non-linear detection methods were developed. These me- ods achieve a high implementation efficiency, by exploiting the p- allelism of the data model and the frequency-selectivity of the pr- agation channel.

Product Details

ISBN-13:	9780792374619
Publisher:	Springer US
Publication date:	07/31/2001
Series:	The Springer International Series in Engineering and Computer Science , #631
Edition description:	2002
Pages:	232
Product dimensions:	6.10(w) x 9.25(h) x 0.02(d)

Table of Contents

The Indoor Propagation Channel.- Array Processing Basics.- Spectrally Efficient Wlan.- SDMA for Multi-Carrier Modulation.- SDMA for Single-Carrier Modulation with Cyclic Prefix.- Towards a Practical SDMA System.- Integration of SDMA in a MAC Prool.- Conclusions.

Editorial Reviews

Space division multiple access (SDMA) achieves high spectral efficiency by reusing the bandwidth within one cell. This book examines the application of SDMA to wireless local area networks (WLAN), and discusses how SDMA systems can be tuned to the characteristics of WLANs. The author analyzes practical problems—such as channel estimation, synchronization, and power control—develops algorithms to mitigate them, and integrates the obtained algorithms into a realistic medium access protocol. Implementation complexity is a recurring theme on all layers of the system design. Annotation c. Book News, Inc., Portland, OR (booknews.com)