Digital Communications Important Questions – DC Imp Qusts

Digital Communications Important Questions Pdf file – DC Imp Qusts

Please find the attached pdf file of Digital Communications Important Questions Bank – DC Imp Qusts

Link – DC Question Bank

UNIT-I

Pulse Code Modulation

1. Summarize differential encoding signaling?
2. Define quantization in PCM?
3. Explain a simple model of nonuni form qunatizer.

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Unit-II

Digital Modulation Techniques

1. Construct the ASK and FSK waveforms for 011011.
2. Sketch the block diagram of ASK generation.
3. Examine how does pulse shaping reduce inter symbol interference?

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Unit-III

Base Band Transmission and Optimal Reception of Digital Signal

1. What is a matched filter?
2. List two applications for eye pattern.
3. What are eye pattern?

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Unit-IV

Linear Block Codes & Cyclic Codes

1. What is linear code?
2. Discuss code rate?
3. Define code efficiency.

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Unit-IV

Convolutional Codes

1. What is constraint length of convolution code.
2. List advantages of convolutional codes
3. Discuss the difference between convolutional code and block code.

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Unit-V

Spread Spectrum Modulation

1. Define spread spectrum communication
2. Explains pseudo noise sequence?
3. Discuss direct sequence spread spectrum modulation

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