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734
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State and explain maximum likelihood decision rule. Explain the function of correlator receiver.
digital communication updated 2.2 years ago by sagarkolekar ★ 11k
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1.7k
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Distinguish between Matched filter and Correlator.
digital communication updated 2.2 years ago by sagarkolekar ★ 11k
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881
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Explain the meaning of equalizer. How is equalization achieved? With the help of neat block diagram explain tapped delay line equalizer.
digital communication updated 2.2 years ago by sagarkolekar ★ 11k
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880
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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 2.2 years ago by sagarkolekar ★ 11k
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1.7k
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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 2.2 years ago by sagarkolekar ★ 11k
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653
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Explain Line codes.
digital communication principles of communication network updated 2.3 years ago by pedsangini276 • 4.8k
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645
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Write short note on Intersymbol interference
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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962
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Construct syndrome table for signal bit error patterns. Using syndromes, find error pattern and codeword for each of the following received vectors.
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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1.2k
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Define Hamming distance, Hamming weight in the context of linear block code. Also explain linearity property and cyclic property of linear codes.
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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1.1k
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Viterbi decoding algorithm for convolution codes.
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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677
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Find the code vectors, parity check matrix, and the error syndrome.
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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711
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Explain with the help of block diagrams and waveforms, the following techniques of spread communication. (a) Direct sequence (b) Frequency hopping.
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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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 2.4 years ago by sagarkolekar ★ 11k
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How is signal bandwidth spread in spread spectrum modulation?
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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What is gram Schmitt orthogonalization procedure? Explain?
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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1.2k
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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 2.4 years ago by sagarkolekar ★ 11k
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561
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What is the significance of Euclidian distance?
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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1.3k
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Compute the syndrome for the received vector 1101101. Is this a valid code vector?
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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1.2k
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Describe the Shannon-Hartley capacity theorem.
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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2.9k
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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 2.4 years ago by sagarkolekar ★ 11k
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3.5k
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Draw the block diagram of QPSK transmitter and receiver and sketch the waveform.
digital communication updated 2.4 years ago by sagarkolekar ★ 11k
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2.3k
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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 2.4 years ago by sagarkolekar ★ 11k
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2.6k
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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 2.4 years ago by Krishna_Agrawal • 2.7k
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2.3k
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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 2.4 years ago by Krishna_Agrawal • 2.7k
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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 2.4 years ago by Krishna_Agrawal • 2.7k
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