802.11 Wireless Networks: The Definitive GuideAs we all know by now, wireless networks offer many advantages over fixed (or wired) networks. Foremost on that list is mobility, since going wireless frees you from the tether of an Ethernet cable at a desk. But that's just the tip of the cable-free iceberg. Wireless networks are also more flexible, faster and easier for you to use, and more affordable to deploy and maintain. The de facto standard for wireless networking is the 802.11 protocol, which includes Wi-Fi (the wireless standard known as 802.11b) and its faster cousin, 802.11g. With easy-to-install 802.11 network hardware available everywhere you turn, the choice seems simple, and many people dive into wireless computing with less thought and planning than they'd give to a wired network. But it's wise to be familiar with both the capabilities and risks associated with the 802.11 protocols. And 802.11 Wireless Networks: The Definitive Guide, 2nd Edition is the perfect place to start. This updated edition covers everything you'll ever need to know about wireless technology. Designed with the system administrator or serious home user in mind, it's a no-nonsense guide for setting up 802.11 on Windows and Linux. Among the wide range of topics covered are discussions on:
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... subcarriers and make those carriers available as distinct channels for data transmission . OFDM boosts throughput by using several subcarriers in parallel and multiplexing data over the set of subcarriers . Traditional FDM was widely ...
... subcarriers are selected so that at each subcarrier frequency , all other subcarriers do not contribute to the overall waveform . One common way of looking at orthogonal- ity is shown in Figure 13-3 . The signal has been divided into ...
... subcarriers . 4 of the subcarriers are used as pilot carriers for monitoring path shifts and ICI , while the other 48 sub- carriers are used to transmit data . Subcarriers are spaced 0.3125 MHz apart . As shown in Figure 13-8 , channels ...
Contents
Introduction to Wireless Networking | 1 |
Overview of 802 11 Networks | 12 |
Mobility Support | 28 |
Copyright | |
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802.11 Wireless Networks: The Definitive Guide: The Definitive Guide Matthew S. Gast Limited preview - 2005 |