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problem 1) A T.V signal bandwidth is 4.2 MHz is transmitted using binary Pulse Code Modulation. Provided that the number of quantization level is 512. Find out:

(a) Code word length

(b) Transmission band width

(c) Final bit rate

(d) Output signal to quantization noise ratio.

problem 2) Describe in detail about Minimum Shift keying. Compare it with QPSK.

problem 3) prepare a brief Note on:

a) Adaptive filters

b) Error probability in PCM

problem 4)a) Describe Delta Modulation in detail.

(b) What you mean by convolution codes? How they vary from Block codes?

problem 5)(a) Describe PAM/TDM system with suitable block diagram and describe briefly about the following:

a) Frame

b) Signaling rate

c) Transmission Bandwidth

d) synchronization

e) cross talk.

(b) Compare Sampling Techniques.

problem 6)(a) Provided an AWGN channel with 4 KHz bandwidth and the noise power spectral density n/2 =10–12 W/Hz. Signal power required at the receiver is 0.1mW. Compute the capacity of the channel.

(b) Why do we need to use Discrete PAM formats? Compare the various PAM formats on the basis of Power spectra and Bandwidth requirements.

problem 7) A sequence X has five symbols with probability P(x1)=0.4, P(x2)=0.19, P(x3)=0.16, P(x4)=0.15 and P(x5)=0.1.

(a) Construct a Shannon-Fano Code for X and find out efficiency of the code.

(b) Repeat for the Huffman code and compare the results.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M99552

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