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DIGITAL COMMUNICATIONS H.W. QI/ A) Find the sampling frequency for the following signals: 1) S1 = 20 cos(1500nt) * cos (4000rt) 500nt. 2) S2 = [sin 2) S2 = sin nt [sin4000nt 3) S3 = +5 cos(1200nt) nt

DIGITAL COMMUNICATIONS H.W. QI/ A) Find the sampling frequency for the following signals: 1) S1 = 20 cos(1500nt) * cos (4000rt) 500nt. 2) S2 = [sin 2) S2 = sin nt [sin4000nt 3) S3 = +5 cos(1200nt) nt

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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DIGITAL COMMUNICATIONS H.W. Q1/ A) Find the sampling frequency for the following signals: 1) S1 = 20 cos(1500nt) * cos (4000nt) 2) S2 = sin (200xt. 3) S3 = sin4000nt + 5 cos(1200nt) nt B) The following waveform is the RB (return to bios) representation of the serial digital data, find the digital data code and draw the NRZ (non-return to zero) and RZ (return to zero) waveforms. C) waveform below is the PAM for the analog signal, draw the analog signal, PWM and the PPM for this signal. 02/ The following data stream (10011011 11001110 11110000 10001000 11100000 11011010 11111111 01110111 10011001 11100111 01011010) will be transmitted with signaling rate equal to 80 k bit/sec. 1- Find the data transmitted using L- parity, V- parity and L&V parity. 2- Find the Hamming code of the last byte of the data only in which two error can be detected and one error can be corrected, calculate the transmitted bandwidth? how can reduce the transmitted bandwidth? Explain and calculate the reduced transmitted bandwidth? 3- By using the following polynomial calculate the data transmitted of the (first byte of the data only) (p= x5 +x3 +x+1). Q3/ A- Design the TDM system of the following 43 signals and calculate the transmitted bandwidth, 1- S1 band limited to 40kHz 2- S2 band limited to 20kHz 3- 18 signal (S3 to S20) each band limited to 5kHz 4- 14 signal (S21 to S34) each band limited to 312.5 Hz 5- 9 signal (S35 to S43) each band limited to 625 Hz
Transcribed Image Text:DIGITAL COMMUNICATIONS H.W. Q1/ A) Find the sampling frequency for the following signals: 1) S1 = 20 cos(1500nt) * cos (4000nt) 2) S2 = sin (200xt. 3) S3 = sin4000nt + 5 cos(1200nt) nt B) The following waveform is the RB (return to bios) representation of the serial digital data, find the digital data code and draw the NRZ (non-return to zero) and RZ (return to zero) waveforms. C) waveform below is the PAM for the analog signal, draw the analog signal, PWM and the PPM for this signal. 02/ The following data stream (10011011 11001110 11110000 10001000 11100000 11011010 11111111 01110111 10011001 11100111 01011010) will be transmitted with signaling rate equal to 80 k bit/sec. 1- Find the data transmitted using L- parity, V- parity and L&V parity. 2- Find the Hamming code of the last byte of the data only in which two error can be detected and one error can be corrected, calculate the transmitted bandwidth? how can reduce the transmitted bandwidth? Explain and calculate the reduced transmitted bandwidth? 3- By using the following polynomial calculate the data transmitted of the (first byte of the data only) (p= x5 +x3 +x+1). Q3/ A- Design the TDM system of the following 43 signals and calculate the transmitted bandwidth, 1- S1 band limited to 40kHz 2- S2 band limited to 20kHz 3- 18 signal (S3 to S20) each band limited to 5kHz 4- 14 signal (S21 to S34) each band limited to 312.5 Hz 5- 9 signal (S35 to S43) each band limited to 625 Hz
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