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Describe coherent method of binary FSK signals. Also draw power spectra for BFSK modulated signal.
digital communication updated 3.9 years ago by phenjoisilab • 0
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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 3.9 years ago by phenjoisilab • 0
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What is the significance of Euclidian distance?
digital communication updated 4.1 years ago by phenjoisilab • 0
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10. State and explain the condition for orthogonality of the BFSK signal determine its spectrum and hence bandwidth requirement for transmission of signal.
digital communication updated 3.9 years ago by phenjoisilab • 0
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What is gram Schmitt orthogonalization procedure? Explain?
digital communication updated 4.1 years ago by phenjoisilab • 0
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A generator matrix of (6,3) linear block code is given by
digital communication updated 3.8 years ago by phenjoisilab • 0
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Compute the syndrome for the received vector 1101101. Is this a valid code vector?
digital communication updated 4.1 years ago by phenjoisilab • 0
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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 4.1 years ago by phenjoisilab • 0
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Design an encoder for systematic code generation and explain its working.
digital communication updated 3.9 years ago by phenjoisilab • 0
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Draw the state diagram and Tree diagram
digital communication updated 3.9 years ago by phenjoisilab • 0
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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 4.1 years ago by phenjoisilab • 0
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Find the code vectors, parity check matrix, and the error syndrome.
digital communication updated 4.1 years ago by phenjoisilab • 0
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Draw the syndrome calculator and explain how received message is corrected?
digital communication updated 3.9 years ago by phenjoisilab • 0
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Describe in convolution code, time domain approach, and Transform domain approach to determine encoder output.
digital communication updated 3.9 years ago by phenjoisilab • 0
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Draw Encoder diagram, trellis diagram, using trellis find code vector if message vector is (101100).
digital communication updated 3.8 years ago by phenjoisilab • 0
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Viterbi decoding algorithm for convolution codes.
digital communication updated 4.1 years ago by phenjoisilab • 0
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Describe in brief four types of Trade-Offs that can be accomplished by using Error correcting code.
digital communication updated 3.8 years ago by phenjoisilab • 0
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Define code rate, code efficiency, systematic and non-systematic in the context of linear block code.
digital communication updated 3.8 years ago by phenjoisilab • 0
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Prove that syndrome depends on error patterns and not on transmitted code word
digital communication updated 3.8 years ago by phenjoisilab • 0
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What are different decoding methods of convolutional codes? Explain any one in detail.
digital communication updated 3.8 years ago by phenjoisilab • 0
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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 4.1 years ago by phenjoisilab • 0
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Compare systematic and non-systematic codes.
digital communication updated 3.8 years ago by phenjoisilab • 0
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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 4.1 years ago by phenjoisilab • 0
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874
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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 4.1 years ago by phenjoisilab • 0
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877
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How is signal bandwidth spread in spread spectrum modulation?
digital communication updated 4.1 years ago by phenjoisilab • 0
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