Page 542 - Digital Signal and Image Processing Using MATLAB
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Modulator
cos(2πF 0 t)
{
Re(a k )
Filter
+
d k a k x e (t) x r (t)
Coder h e (t) Channel
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Size M Filter h c (t)
constellation Im(a k ) Additive white
h e (t) Gaussian noise
sin(2πF 0 t)
Demodulator
{
cos(2πF 0 t)
y R (t) r R (n)
Filter
a k d k
h r (t) T
y I (t) r I (n)
Filter
h r (t) T Decision
−sin(2πF 0 t)
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