Mobile Communication Test: MCQs Electronics Engineering

Mobile Communication Test Questions. Questions And Answers on the topic of Mobile Communication for Test And Study purpose.

 

Mobile Communication Test

 

 

The RAKE receiver involves the steps ??

a. Correlator, estimation of a transmitted signal, demodulation, bit decision
b. Estimation of a transmitted signal, correlator, demodulation, bit decision
c. Estimation of a transmitted signal, demodulation, correlator, bit decision
d. Estimation of transmitted signal, demodulation, bit decision, correlator

 

In residual excited LPC ??

a. The residue of subtraction of generated and original signal is quantized at the transmitter
b. Pitch detection is not required
c. Multiple pulses per period
d. Coder and decoders have a predetermined set of codes

 

The search window of a RAKE receiver is ??

a. Frequency band of the channel
b. Range of the time delays
c. Range of noise
d. All of the above

 

Multipulse excited LPC includes ??

1. Multiple pulses per period
2. Minimization of weighted mean square error
3. Better speech quality
4. Pitch detection is not required

a. 1 and 4 are correct
b. 1 and 3 are correct
c. 2 and 4 are correct
d. All four are correct

 

Test MCQs

 

 

Speech Coders are categorized on the basis of ??

a. Signal compression techniques
b. Frequency of signal
c. The bandwidth of the signal
d. All of the above

 

Linear predictive coders are based on the principle that ??

1. Current signal sample is obtained from a linear combination of past samples
2. Current signal sample is independent of past samples
3. These are time-domain vocoders
4. They are among low bit rate vocoders

a. 1, 3, and 4 are correct
b. 2, 3, and 4 are correct
c. 1 and 4 are correct
d. All the four are correct

 

Waveform coders and Vocoders are the types of ??

a. Speech coders
b. Modulation technique
c. Frequency translation methods
d. Channel allocation for transmission

 

In voice excited vocoders, PCM transmission helps in the transmission of ??

a. High-frequency bands of speech
b. Low-frequency bands of speech
c. Multiplexed signals
d. Modulated signals

 

Mobile Communication Test

 

PCM, DPCM, DM, ADPCM are the types of ??

a. Vocoders
b. Waveform coders
c. Channel allocation for transmission
d. All of the above

 

Vocal tract cepstral coefficients and excitation coefficients are separated by ??

a. Samplers
b. Linear filters
c. Encoders
d. Multiplexers

 

A speech coding technique that is independent of the source is ??

a. Vocoders
b. Waveform coders
c. Both a & b
d. None of the above

 

The steps involved in Channel vocoders for speech transmission are ??

a. Envelope detection, sampling, encoding, multiplexing
b. Sampling, Envelope detection, encoding, multiplexing
c. Envelope detection, encoding, sampling, multiplexing
d. Sampling, Envelope detection, multiplexing, encoding

 

Mobile Communication Test

 

The advantage of using waveform coders is ??

1. Independent of the signal source
2. Less complexity
3. Suitable for noisy environments

a. 1 and 2 are correct
b. 1 and 3 are correct
c. 2 and 3 are correct
d. All the three are correct

 

The speech coding technique that is dependent on the prior knowledge of the signal is ??

a. Waveform coders
b. Vocoders
c. Sub-band coding
d. Block transform coding

 

The type of frequency domain coding that divides the speech signal into sub-bands is ??

a. Waveform coding
b. Vocoders
c. Block transform coding
d. Sub-band coding

 

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