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Define phase rule and explain terms like phase, component and degree of freedom by giving appropriate examples.
digital communication updated 3.8 years ago by teamques10 ★ 69k
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A generator matrix of (6,3) linear block code is given by
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Draw the block diagram of QPSK transmitter and receiver and sketch the waveform.
digital communication updated 3.2 years ago by sagarkolekar ★ 11k
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Compare offset QPSK and non-offset QPSK.
digital communication updated 2.9 years ago by sagarkolekar ★ 11k
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3. Explain the working of M-ary PSK transmitter and receiver and plot Spread spectrum and calculate the bandwidth.
digital communication updated 3.2 years ago by sagarkolekar ★ 11k
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Prove that syndrome depends on error patterns and not on transmitted code word
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Construct a Shannon Fano code for the source and calculate code efficiency, redundancy of the code. Repeat same for the Huffman source coding technique.
digital communication updated 3.2 years ago by Krishna_Agrawal • 2.7k
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Justify that the probability of error in matched filter does not depend on the shape of input signal. Derive the relevant expression.
digital communication updated 2.9 years ago by sagarkolekar ★ 11k
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Determine the symbol rate of transmission and the bandwidth requirement of the communications channel for i) 8-ary PSK system ii) 16-ary PSK system
digital communication updated 3.2 years ago by Krishna_Agrawal • 2.7k
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Sketch the encoder and syndrome calculator for the generator polynomial $g(x)=1+x^2+x^3$ and obtain the syndrome for the received codeword 1001011.
digital communication updated 3.2 years ago by sagarkolekar ★ 11k
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1. State two criteria which a spread- spectrum communication system most satisfy. Justify that the spread- spectrum signals are transparent to the interfering signals, and vice versa.
digital communication updated 3.2 years ago by sagarkolekar ★ 11k
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Explain the necessity of line codes for data transmission. State different types of line codes. Plot power spectral density of NRZ signal.
digital communication updated 3.2 years ago by Krishna_Agrawal • 2.7k
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Draw the syndrome calculator and explain how received message is corrected?
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Draw and Explain the block diagram of OQPSK transmitter. Sketch the waveforms at the output of each block of the transmitter.
digital communication updated 3.1 years ago by sagarkolekar ★ 11k
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Define code rate, code efficiency, systematic and non-systematic in the context of linear block code.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Derive the expression for error probability BPSK system with coherent detection.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Describe in convolution code, time domain approach, and Transform domain approach to determine encoder output.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Distinguish between Matched filter and Correlator.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Write short note on Intersymbol interference (ISI) and Eye diagram.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Draw the signal space diagram of 16-QASK and calculate the Euclidean and compare with 16- PSK.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Describe in brief four types of Trade-Offs that can be accomplished by using Error correcting code.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Explain in detail 16-QAM transmitter and receiver system. Draw and explain signal constellation diagram for 16-QAM.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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Compute the syndrome for the received vector 1101101. Is this a valid code vector?
digital communication updated 3.2 years ago by sagarkolekar ★ 11k
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Design Encoder for an (8,5) cyclic code with generator $g_3 (x)=1+x+x^2+x^3$. Use this encoder to find the code word for the message (10101) in systematic form.
digital communication updated 3.2 years ago by sagarkolekar ★ 11k
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Explain the coherent and non-coherent digital modulation techniques.
digital communication updated 3.0 years ago by sagarkolekar ★ 11k
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