Draw and explain the block diagram of Pulse code Modulation (PCM).
[7 marks]Define Cumulative Distribution Function. State and prove the properties of CDF.
[7 marks]Explain Delta Modulation using neat block diagram and waveforms. What are the disadvantages of Delta Modulation? How can we remove them?
[7 marks]Define the Probability Density Function. The PDF of amplitude Xof a certain signal x(t) is given by p (x) = 0.5|x|e−|x|, Determine the probability that: (1) X ≥ 1 (2) -1 x < X 2 (3) X -2.
[7 marks]Azero-memory source emits four messages with probabilities 0.5, 0.3, 0.1 and 0.1. Find the entropy of the source. Obtain the compact binary code and find the average code word length, the efficiency, and the redundancy.
[7 marks]State and prove Central Limit Theorem.
[7 marks]Which the ideal properties of line codes. Compare Polar, On-Off and Bipolar signaling with respect to desirable properties of line codes using necessary equations.
[7 marks]Write a short note on: Scrambling.
[7 marks]Why pulse shaping is required? What is Inter Symbol Interference? Explain Nyquist second criterion for partial ISI.
[7 marks]Derive the equation for channel capacity of a band-limited AWGN channel.
[7 marks]For (6, 3) systematic linear block code, the three parity check digits c4, c5 and c6 are c4 = d1 + d2 + d3 c5 = d1 + d2 c6 = d1 + d3
[7 marks]Construct the code generated by this matrix.
[ marks]Prepare a suitable decoding table.
[ marks]Decode the received codeword 101100.
[ marks]Derive the equation for channel capacity of discrete memoryless channel.
[7 marks]Explain the principle and generation of cyclic code by example.
[7 marks]Explain the operation of BPSK transmitter and receiver.
[7 marks]Explain coherent detection of Amplitude-Shift keying (ASK) signal with necessary equations.
[7 marks]Explain the BFSK Modulation and demodulation in detail.
[7 marks]Which are the different types of spread spectrum systems? Draw and explain the block diagram of Frequency Hopping Spread Spectrum (FHSS) system.
[7 marks]