February 2004
Intermediate to advanced
312 pages
8h 49m
English
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WLAN Device
The most common WLAN device is a PC adapted with a PCMCIA card. This is suitable for direct connection to a PC or a laptop or any other application. The WLAN card is divided into two major sections: the PHY layer and the MAC processing area (see Figure 4-9). An antenna receives the 802.11b signal, and this is often sent through frequency doublers (squaring loops) so that the signal can be properly extracted from the carrier. If DSSS is used, a local synthesizer generates the code word and subsequently demodulates the bit stream. Typically, intermediate frequency gain modulation is used for extracting the bit stream. In such a case, a local frequency generator generates the frequency (carrier), and it is mixed with the incoming signal. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.