FM Receiver

1.

FM Receiver
RF Carrier range: 88 – 108 MHz
Midband IF Freq.: 10.7 MHz
IF Bandwidth: 200 KHz
RF
Section
&
Mixer
Sw(f)
No/2
f
Power Spectral Density of the White Noise, w(t)
Power Spectral Density of the Colored Noise, n(t)
1

2.

w(t) is added White Gaussian Noise
x(t) = s(t) + n(t),
n(t) = nI(t) cos(2πfct) + nQ(t) sin(2πfct)
n(t) = r(t) cos[2πfct + ψ(t)], where
2

3.

r(t)
ψ(t)
x(t)
Ac
Reference (ωct)
θ(t)
φ(t)
Reference (ωct)
3

4.

v(t) = signal term + noise term
4

5.

x(t) ↔X(f)