EC2301 DIGITAL COMMUNICATION 2 MARKS WITH ANSWERS PDF

Define Dirac comb or ideal sampling function. What is its Fourier Transform? Dirac comb is nothing but a periodic impulse train in which the impulses are spaced by a time interval of Ts seconds. Give the interpolation formula for the reconstruction of the original signal.

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Thank you! Pen down your valuable important comments below. Breaking Loading Disclaimer Contact Privacy Policy. Which parameter is called figure of merit of a digital communication system and why? What is meant by distortion less transmission? Why is prefiguring done before sampling? Define quantization noise power. Define Hamming distance and calculate its value for two code words and What is the need for a demodulator in case of base band signaling when the received waveforms are already in pulse like form?

How does pulse shaping reduce inter symbol interference? Define QAM and draw its constellation diagram. A binary frequency shift keying system employs two signaling frequencies 1 f and 2 f. The lower frequency 1 f is Hz and signaling rate is Baud. Calculate 2 f. Marks 16 Or b i Distinguish between base band and bandpass signaling. Marks 6 ii Explain Binary symmetric channel and Gaussian channel with their mathematical models. Marks 10 I3 Find i The parity check matrix ii The generator matrix iii All possible code words.

Calculate the syndrome and decode the received sequence. Or b i Explain how encoding is done by convolution codes with a suitable example. Marks 10 ii Explain tree diagram, trellis diagram and state transition diagram of convolution codes. Marks 6 Marks 10 ii Explain how a matched filter can maximize SNR for a given transmitted symbol.

Marks 6 Or b What does the term equalization refer to? Explain how it is carried out by using transverse filters. Marks 16 Marks 4 ii Explain non-coherent detection methods of binary frequency shift keying scheme. Marks 8. Previous Post. Next Post. Duraimani B.

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EC2301 Digital Communication Nov Dec 2010 Past Exam Paper

She has developed this website for the welfare of students community not only for students under Anna University Chennai, but for all universities located in India. That's why her website is named as www. If you don't find any study materials that you are looking for, you may intimate her through contact page of this website to know her so that it will be useful for providing them as early as possible. You can also share your own study materials and it can be published in this website after verification and reviewing. Thank you! Pen down your valuable important comments below. Breaking Loading

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Hence higher frequencies take the form of lower frequencies. This interference of. Amplitude reconstruction signal is done to remove amplitude discontinuities due to pulses. Write an expression for bandwidth of binary PCM with N messages each with a maximum frequency of fm Hz. Hence a PPM pulse of fixed width is produced after falling. PDM represents the input signal amplitude in the form of width of the pulse. In other words,.

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