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Figure Q4 (c) shows one of digital modulation techniques where the binary digital input is given as 1110010110 and each symbol is transmitted at T = 2 msec. The oscillator 1 and 2 feeds 107 kHz and 127 kHz respectively to the respective multiplier, and the resulting digital modulated signal is obtained at the summer output. (i) Identify the digital modulation technique used in Figure Q4 (c). (ii) Calculate the data bit rate (bits/sec) (iii) Determine the bandwidth (Hz) for the modulated signal at the summer output.

Figure Q4 (c) shows one of digital modulation techniques where the binary digital input is given as 1110010110 and each symbol is transmitted at T = 2 msec. The oscillator 1 and 2 feeds 107 kHz and 127 kHz respectively to the respective multiplier, and the resulting digital modulated signal is obtained at the summer output. (i) Identify the digital modulation technique used in Figure Q4 (c). (ii) Calculate the data bit rate (bits/sec) (iii) Determine the bandwidth (Hz) for the modulated signal at the summer output.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Figure Q4 (c) shows one of digital modulation techniques where the binary digital input is given as 1110010110 and each symbol is transmitted at T = 2 msec. The ocillator 1 and 2 feeds 107 kHz and 127 kHz respectively to the respective multiplier, and the resulting digital modulated signal is obtained at the summer output. (c) (i) Identify the digital modulation technique used in Figure Q4 (c). (ii) Calculate the data bit rate (bits/sec) (iii) Determine the bandwidth (Hz) for the modulated signal at the summer output. (iv) Explain your answer in Q4(c)(iii) with an aid of a frequency spectrum diagram illustration. (v) Given that the energy bit over the noise density ratio, Eb/No = 0.72. Calculate the probability of bit error if a coherent detector is used to demodulate the output from the summer in Figure Q4 (c).
Transcribed Image Text:Figure Q4 (c) shows one of digital modulation techniques where the binary digital input is given as 1110010110 and each symbol is transmitted at T = 2 msec. The ocillator 1 and 2 feeds 107 kHz and 127 kHz respectively to the respective multiplier, and the resulting digital modulated signal is obtained at the summer output. (c) (i) Identify the digital modulation technique used in Figure Q4 (c). (ii) Calculate the data bit rate (bits/sec) (iii) Determine the bandwidth (Hz) for the modulated signal at the summer output. (iv) Explain your answer in Q4(c)(iii) with an aid of a frequency spectrum diagram illustration. (v) Given that the energy bit over the noise density ratio, Eb/No = 0.72. Calculate the probability of bit error if a coherent detector is used to demodulate the output from the summer in Figure Q4 (c).
Binary digital input -A1 Oscillator +V fi Σ Inverter Oscillator V +Ao -An Figure Q4 (c): Digital modulation system
Transcribed Image Text:Binary digital input -A1 Oscillator +V fi Σ Inverter Oscillator V +Ao -An Figure Q4 (c): Digital modulation system
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