Digital communication
Previous year question paper with solutions for Digital communication
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- Explain uniform and non-uniform companding.
- Explain fundamentals of Time Division Multiplexing.
- What are the advantages of digital communication systems over analog communication systems?
- Explain Gaussian minimum shift keying.
- Draw the waveforms of an unmodulated carrier, data, ASK, PSK and FSK.
- Differentiate between unipolar and bipolar signaling.
- What is MSK modulation scheme?
- State and explain the sampling theorem.
- What are guard bands and when it is used?
- What is quantization error?
- What is Inter Symbol interference?
- Draw the frequency spectrum of FSK.
- What is coding efficiency?
- What is Coherent detection? Give any one suitable example.
- What is Time division multiplexing?
- What is Information?
- Why is clock recovery required in a BPSK demodulator circuit?
- What is Manchester coding? Give its advantage.
- What is Shannon’s limit for Information capacity?
- Define the terms bit rate and baud rate.
- A receiver has an equivalent noise figure of 2 dB. Calculate its equivalent noise temperature.
- With diagram define the term Aliasing.
- Can we use DM practically as an alternative to PCM?
- Write the remedy to reduce inter symbol interference.
- Why do we need to use the discrete PAM formats?
- Why we prefer DPSK instead of BPSK?
- What is the difference between Line coding and source coding?
- Write the basic difference between Bandpass transmission and Passband transmission.
- What is the need of coherent detection?