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Question 1
The bit rate of a digital communication system is 34M bits. The modulation scheme is QPSK. The baud rate of the system is
Question 2
A sinusoidal signal with peak to peak amplitude of 1.536 V is quantized into 128 levels using a mid rise uniform quantizer. The quantized noise power is
Question 3
An ideal band-pass channel 500 Hz - 2000 Hz is deployed for communication. A modem is designed to transmit bits at the rate of 4800 bits/s using 16-QAM. The roll-off factor of a pulse with a raised cosine spectrum that utilizes the entire frequency band is
Question 4
The bandwidth efficiency of an 8-ary PSK signal is given by
Question 5
The bandwidth required for the transmission of a Pulse Code Modulated signal is increased by the factor of ____ when the number of quantization level is increased from 16 to 256.
Question 6
A direct sequence spread binary phase-shift keying system uses a feedback shift register of Length 19 for the generation of PN sequence . The system is required to have an average probability of symbol error due to externally generated interfering signals that does not exceed 10-5.
The antijam margin is :-
The antijam margin is :-
Question 7
If band width required to transmit BPSK signal is 1000 KHz. than the band width required for Q ary PSK transmission is
Question 8
An analog voltage signal with highest frequency of 1 kHz is digitally encoded with a resolution of 0.02% covering the voltage range-50 V to 50 V to avoid the loss of information, the rms value of quantization noise is
Question 9
Pulse rate in a DM system is 56,000 per second. Input signal is
with t in seconds
The minimum value of step size which will avoid stope overload distortion should
with t in seconds The minimum value of step size which will avoid stope overload distortion should
Question 10
If receiver has an available power gain of 110 dB and a noise bandwidth of 100 MHz, the available output noise power of receiver is (T= 300 oK)
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Aug 14ESE & GATE EC
