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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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62 3 Communication
16-QAM. It can carry M = 16 different symbols and a symbol consists of 4 bits.
Thus the modulation rate is ρ = 4.
In digital communications, we are usually interested in the minimum probability
of error (MPE) decision rule: given a received vector
ˆ
y, choose the signal point y
A to minimize the probability of decision error Pr{E}. Since the probability that a
decision y
is correct is simply the a posteriori probability p(y
|
ˆ
y), the MPE rule
is equivalent to the maximum a posteriori (MAP) rule: choose the y
A such that
p(y
|
ˆ
y) is maximum among all p(y
j
|
ˆ
y),y
j
A . By Bayes law,
p(y
j
|
ˆ
y) =
p(
ˆ
y | y
j
)p(y
j
)
p(
ˆ
y)
. (3.41)
If
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Publisher Resources

ISBN: 9781482234138