December 1999
Intermediate to advanced
258 pages
5h 23m
English
Content preview from Essential Guide to RF and Wireless, TheBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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MODULATION
What is Modulation?
Modulation is a mathematically complex subject which is difficult to explain quantitatively because it is easy to get lost in all of the formulas. Fortunately, it is simple to visually understand, which is how it is covered here.
Earlier, I described a digital signal as "riding on the back of the RF." Modulation is the way the information signal (analog or digital) is made to ride on the back of the carrier signal (the RF). This is done by taking the RF signal and superimposing the information signal onto it. The act of superimposing the information signal onto the RF (carrier) signal is called modulation, and the device which does the superimposing is called a modulator. In RF systems, the RF first gets modulated ...
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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.