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Advances in Visual Data Compression and Communication
book

Advances in Visual Data Compression and Communication

by Feng Wu
July 2014
Intermediate to advanced content levelIntermediate to advanced
513 pages
16h 40m
English
Auerbach Publications
Content preview from Advances in Visual Data Compression and Communication
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Chapter 14
Compressive Modulation
14.1 Introduction
In digital communications, as we have discussed in Chapter 3, modulation is the pro-
cess of impressing a bitstream on a carrier wave by varying its amplitude, frequency,
or phase relative to a certain point in time. Every state of modulated waveform lasts
for a fixed period of time, which is referred to as a symbol. In order to convey K bits
of data in one symbol, it needs to have 2
K
different states. The symbol rate of a com-
munications system is usually fixed. Thus, a sender realizes different transmission
rates by adjusting K.
A symbol can also be conveniently represented as a point on a complex plane,
called constellation diagram. So, there are 2
K
possible points on the sender’s con-
stellation ...
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Publisher Resources

ISBN: 9781482234138