Compare the performance of various digital modulation schemes 19. Draw the block diagram of QPSK transmitter and coherent QPSK receiver and explain their operation 18. Discuss on signal design for ISI elimination 17.
Derive the expression for power spectral density of unipolar NRZ line code and explain its characteristics 16. Describe the Nyquist criterion method for distortion less transmission 15. Explain modified duo binary signaling scheme without and with precoder 14. Explain signal design for ISI elimination 13. Explain (a) Noise in delta modulation (b)Principles of LPC Model(c) Prediction Filtering 12. Describe the linear predictive coding technique in speech encoding 11. Discuss differential pulse Code Modulation Scheme and explain the principles 10. Discuss about delta modulation and adaptive delta modulation in detail with neat block diagram 9. Explain DPCM system and expressions in detail 8. Discuss (a) Analog compander (b) Digital compander 7. Explain non uniform quantization technique in detail 6.
Draw the block diagram of digital communication system and explain 4. Explain the principle and process of quantization and obtain the expression for the signal to quantization noise for the case of a uniform quantizer 3. Explain Nyquist sampling theorem and how the message can be reconstructed from its samples with an example 2. Anna University Exams Nov / Dec 2016 – Regulation 2013 Unique Important Questions – 5th Semester BE/BTECH EC6501 Digital Communication (Unit I-V) Unit-1 1.
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