Which one of the following modulation techniques is the most efficient for pulse telemetry
The Nyquist sampling rate for the signal is given by
The Nyquist sampling interval, for the signal sin c(700t) + sin c(500t) is
The Nyquist rate for the signal x(t) = 2 cos (2000 π t) cos (5000 π t), is
A signal occupies a band 5 kHz to 10 kHz. For proper error free reconstruction at what rate it should be sampled
Which one of the following pulse communication systems is digital
A signal is sampled at 8 kHz and is quantized using 8bit uniform quantizer. Assuming SNR_{q}for a sinusoidal signal, the correct statement for PCM signal with a bit rate of R is
What are the three steps in generating PCM in the correct sequence
In a PCM system, if the code word length is increased from 6 to 8 bits, the signal to quantization noise ratio improves by the factor
In a PCM system each quantization level is encoded into 8 bits. The signal to quantisation noise ratio is equal to
If the number of bits per sample in a PCM system is increased, the improvement in signaltoquantization noise ratio will be
The main factor that determines the accuracy of a reconstructed PCM signal is the
The quantization noise of a PCM system depends on
Companding is used
Companding is used in PCM to
Which of the following pulse modulations are digital
1. PCM
2. Differential PCM
3. PWM
Select the correct answer using the codes given below:
"Slope overload" occurs in delta modulation when the
To overcome slope overload problem, which type of integrator is used in delta modulation
In delta modulation, the slope overload distortion can be reduced by
Which one of the following modulation technique is most affected by noise
In case of data transmission, which one of the following systems will give the maximum probability error
If S represents the carrier synchronization atthe receiver and r represents the bandwidth efficiency, then the correct statement for the coherent binary PSK is
If the probability of a message is 1/4, then the information in bits is
The capacity of a channel is given by the
At a given probability of error, binary coherent FSK is inferior to binary coherent PSK by
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