Anna University, Chennai Nov/Dec 2012 Examinations
Rejinpaul.com Important Questions
EC 2301 - Digital Communication
Common To V Sem ECE
Unit I-V
1.       Briefly discuss about the types of analog pulse communication system with diagram
2.      Compare the bit error probability due to coherent ASK,PSK and FSK systems.Compare the performance of these systems
3.       Draw the neat block diagram of a typical DC system
4.      Explain the mathematical model and classification of communication channel
5.      Draw the block diagram of DPCM scheme and explain the principles in detail.
6.      State the Nyquist sampling theorem (problem: to check validity for an analog signal)
7.       Explain in detail about LPC and SBC
8.      Give the block diagram for the generation and detection of BFSK signal and explain in detail
9.   Explain in detail about DPCM and Derive the predictor gain
10.   explain in detail about viterbi decoding algorithm
11.   Derive power spectra of polar codes and on-off codes. Discuss the features in detail
12.   Define syndrome.(Problem: syndrome calculator for some cyclic code with diagram)
13.   Obtain the expression for Nyquist criteria for distortionless baseband transmission for zero ISI
14.   Derive bit error probability (they may ask any)
15.   Explain in detail about generation and detection of BPSK signal
16.   Derive the error probabilty for non coherent detection of ASK system
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