WorksheetsDigital Communication : UNIT-2
Total questions: 20
Worksheet time: 20mins
The process of approximating the continuous set of values with a finite set of values is called _________ .
Modulation
Quantization
Sampling
Approximation
Select the correct order of blocks in PCM transmitter.
Encoder, Quantizer, Sampler, Low pass filter.
Low pass filter, Sampler, Quantizer, Encoder.
Low pass filter, Quantizer, Sampler, Encoder.
Low pass filter, Encoder, Sampler, Quantizer.
PCM Transmitter doesn't consist this block.
Low pass filter
Sampler
Amplifier
Encoder
The difference between the actual analog value and approximated discrete value due to the rounding is called __________
quantization error
normal error
reading error
sampling error
Quantization noise ____________ the SNR of a signal.
reduces
increases
Each quantized sample is assigned the binary code that represents the discrete amplitude value closest to the pulse's actual value. This is known as ________
Quantization
Sampling
Encoding
Decoding
The task of a Regenerative repeater is .....
Equalization
Timing
Decision making
All of these.
The process of compensating for the effects of amplitude and phase distortion produced by the channel is _______.
Timing
Equalization
Decision making
None of these
The process of assigning time instants when the probability of making of a wrong decision is minimum is called _______ .
error
Equalization
Timing
sampling
The process which regenerates the PCM wave is ____
Decision making
Timing
Decoding
Equalization
Select the quantization techniques..
Linear quantization
Uniform quantization
Non-uniform quantization
Non-linear quantization
A (a) quantizer uses equal length quantization intervals linearly related to analog sample values.
Identify the type of quantizer.
Mid-rise type
Mid-tread type
Identify the quantization technique.
Uniform quantization
Non uniform quantization
The process of compressing an analog signal at the source and expanding signal back to its original size when it reaches its destination is called _____
Demodulation
Modem
Companding
quantization
Select the advantages of PCM
It can increase the capacity of single telephone channels over cable pairs by multiplexing.
Increases system complexity.
Ruggedness to channel noise and interference.
Increased bandwidth requirement.
DPCM is a process of converting an analog signal into a digital signal.
True
False
A digitization technique that makes use of the sample-to-sample redundancies in an analog waveform.
Pulse Code Modulation
Delta modulation
Name the distortions in Delta modulation.
A) Granular noise B) Slope-overload distortion
A) Slope-overload distortion B) Granular noise
Identify the type of signaling.
Unipolar NRZ
Unipolar RZ
Polar NRZ
Polar RZ
