1081.
BPSK system modulates at the rate of
A
2 bit/ symbol
B
4 bit/ symbol
C
1 bit/ symbol
D
None of the above
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BPSK system modulates at the rate of
2 bit/ symbol
4 bit/ symbol
1 bit/ symbol
None of the above
The probability of error of DPSK is …………. than that of BPSK
Lower
Same
Higher
Not predictable
ASK modulated signal has the bandwidth
Half the bandwidth of baseband signal
Double the bandwidth of baseband signal
Same as the bandwidth of baseband signal
None of the above
The Nyquist theorem is
Helps in quantization
Limits the bandwidth requirement
Relates the conditions in time domain and frequency domain
Both a and c
Nyquist criterion helps in
Reduction in transmission bandwidth
Increase in transmission bandwidth
Transmitting the signal without ISI
Both a and b
Pulse shaping is done
by limiting the bandwidth of transmission
after line coding and modulation of signal
to control Inter Symbol Interference
All of the above
The number of bits of data transmitted per second is called
Modulation rate
Coding
Data signaling rate
None of the above
Run Length Encoding is used for
Bit error correction
Correction of error in multiple bits
Reducing the repeated string of characters
All of the above
Parity check bit coding is used for
Error detection
Error correction and detection
Error correction
None of the above
Parity bit coding may not be used for
Which bit is in error
Both a & b
Error in more than single bit
None of the above
A linear code
All-zero code word is a code word
Minimum hamming distance between two code words is equal to weight of any non zero code word
Sum of code words is also a code word
All of the above
Timing jitter is
Change in frequency
Deviation in location of the pulses
Change in amplitude
All of the above
Entropy is
Information in a signal
Amplitude of signal
Average information per message
All of the above
Information rate is defined as
Average number of bits of information per second
rH
Information per unit time
All of the above
Matched filters may be used
In parameter estimation problems
To estimate the distance of the object
To estimate the frequency of the received signal
All of the above
In Adaptive Delta Modulation, the slope error reduces and
Quantization error increases
Quantization error remains same
Quantization error decreases
None of the above
The digital modulation technique in which the step size is varied according to the variation in the slope of the input is called
PCM
Adaptive delta modulation
Delta modulation
PAM
Granular noise occurs when
There is interference from the adjacent channel
Step size is too small
Bandwidth is too large
Step size is too large
DPCM is a technique
Where digital codes are the quantized values of the predicted value
To convert analog signal into digital signal
All of the above
Where difference between successive samples of the analog signals are encoded into n-bit data streams
In Delta Modulation, the bit rate is
N times the nyquist criteria
N times the sampling frequency
None of the above
N times the modulating frequency