Test: Communication System- 6 - Electrical Engineering (EE) MCQ

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 8-bit uniform quantizer. Assuming SNR_qfor 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 signal-to-quantization 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