Amplitude modulation(AM) and freqeuncy modulation (FM)
Pulse code modulation (PCM) and frequency shift keying (FSK)
Phase modualtion (PM) and quadrature phase shift keying (QPSK)
Pulse code modulation (PCM) and continuously variable slope delta (CVSD) modulation
Delta modulation (DM)
Digital modulation
Analog modulation
Adaptive modulation
Delta Modulation (DM)
Digital modulation
Analog modulation
Adaptive modulation
Sidebands.
Sine waves.
Frequency translators.
Modulating fequencies.
Twice that of the modulating signal.
Half that of the modulating signal.
Twice that of the carrier signal.
Half that of the carrire signal.
Filtering.
Detection.
Compression.
Companding.
2 decibels (dB) of improvement
4 decibels of improvement
6 decibels of improvement
8 decibels of improvement
Carrier wave.
Pure sine wave.
Resultant wave.
Composite wave.
A phase modulation (PM).
Pulse modulation.
A frequency modulation.
An amplitude modulation (AM).
Transmitted intelligence
Intensity of speech
Composite waves
Splatter
Phase.
Amplitude.
Frequency.
Apmlitude and frequency.
Modulation index.
Rate of phase shift.
Frequency of the modulating signal.
Amplitude of the modulating signal.
Delta
Frequency shift keying (FSK)
Pulse-amplitude modulation (PAM)
Binary-phaseshift keying or bi-phase shift keying (BPSK)
Four times
Double
Half
The same
Carrier presence is required to detect change
It requires a less complex receiver than a basic phase shift keying (PSK) signal
It requires a more complex receiver than a basic PSK signal
The demodulator needds to detect changes in the absolute phase values
Pulse-amplitude modulation (PAM)
Pulse-duration modulation (PDM)
Pulse-positon modulation (PPM)
Pulse-code modulation (PCM)
Pulse-amplitude modulation (PAM).
Pulse-duration modulation (PDM).
Pulse-positon modulation (PPM).
Pulse-code modulation (PCM).
Pulse-amplitude modulation (PAM).
Pulse-duration modulation (PDM).
Less tolerant of noise than frequency modulation (FM).
Analog-to-digital conversion
3
4
5
8
Encoding.
Companding.
Uniform quantizing.
Nonuniform quantizing.
Channel
Trunk
Time slot
Port
Low speed and high speed
High speed and EBCDIC
CCITT and low speed
EBCDIC and CCITT
Frequency division.
Binary division.
Pulse division.
Time division.
Wavelengths or lambas.
Wavelengths or gammas.
Frequencies or lambdas.
Frequencies or gammas.
1
2
3
4