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Higher Study | Communication Systems | Introduction To Digital Modulation

Which of the following requires a synchronizing signal?
Which one of the following statements about differential pulse code modulation (DPCM) is true?
In digital communication, Inter Symbol Interference (ISI) is a form of distortion where one symbol interferes with subsequent symbols. An eye diagram is used to study the extent of ISI in a communication channel. Which of the following is FALSE?
It is assumed that quantization error, e(n) is a sequence of random variables where 1. The statistics do not change with time. 2. It is a sequence of uncorrelated random variables. 3. It is uncorrelated with the quantizer input x(n). 4. The probability density function is uniformly distributed over the range of values of quantization error. Which of the above statements are correct?
Which of the following is that process that including in Equalization process?
PSK and FSK are which type of modulation?
Indicate which of the following system is digital
Which modulation technique does not use past information for modulation
Consider the following statements for multiple access system in a satellite earth station: 1. Access to the same repeater sub-systems and the same RF channel is possible. 2. Frequency division multiple access is used. 3. Several carriers are not amplified by the same TWT. Which of the above statements are correct?
In which modulation does the signal convert its analog information into a binary sequence, i.e., in 1s and 0s 
Which type of encoding is used in USB?
The correct sequence of operations which a regenerative repeater performs is
Indicate which of the following pulse modulation scheme is analog
The maximum speed at which the data can be transmitted on each channel of a standard PCM stream is
If the synchronization between transmitter and receiver fails which of the following pulse systems would be affected?
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