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Modulation
Double Sideband-Amplitude Modulation/Demodulation (DSB-AM), Audio Source
voice f ($f_{max}=8\mathrm{kHz}$)
voice m ($f_{max}=8\mathrm{kHz}$)
piano ($f_{max}=8\mathrm{kHz}$)
sine 440Hz
sine 1000Hz
sum, sini 440,1000Hz
source
TX baseband (BB)
TX PB, modulated
RX PB, after channel
RX BB, demodulated
RX BB, filtered
signal
time/frequency-domain
time-domain
frequency-domain
shown
$f_{c}$ in [Hz] at TX
add carrier, TX DC-offs.
$f_{c,RX}$ in [Hz]
$\cos(\omega_{c,RX}t)$
$(\cdot)^2$
diode
$|\cdot|$ (abs)
RX demod.
$f_{max,LP}=1.5f_{max}$
$f_{max,LP}=0.75f_{max}$
$f_{max,LP}=1f_{max}$
$f_{max,LP}=2f_{max}$
RX-filt.
0
$\pi/4$
$\pi/2$
$\pi$
$3\pi/2$
$\psi$ RX phase offset
$t_{min}$ [sec.] display
$t_{max}$ [sec.] display
selected freq., lin
selected freq., dB
all freq., lin.
pos. freq., lin.
all freq., dB
pos. freq., dB
spectr. disp.
$f_{min}$ [Hz] display
$f_{max}$ [Hz] display
1/1
Idle.
Source code
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