The two baseband signals m1(t) and m2(t) are to be transmitted simultaneously Qver a channel by multiplexing scheme shown below. Sketch signal spectra at each indicated point, and what value of the carrier and filter H specification required to modulate m, (t) so that it is next to the spectrum of the signal at point R (upper or lower). Mi(f) W (t) x cin 1 6 HPF I PF

The two baseband signals m1(t) and m2(t) are to be transmitted simultaneously Qver a channel by multiplexing scheme shown below. Sketch signal spectra at each indicated point, and what value of the carrier and filter H specification required to modulate m, (t) so that it is next to the spectrum of the signal at point R (upper or lower). Mi(f) W (t) x cin 1 6 HPF I PF

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

See similar textbooks

Similar questions

A sinusoidally modulated AM waveform is shown below: Determine: a) Peak amplitude of the upper and lower side frequencies. b) Peak amplitude of the unmodulated carrier. The modulation index. The carrier power and the power in the sidebands. The total transmitted power. 3 0 -3 -9 The transmission efficiency. The amplitude of the carrier which must be added or subtracted to attain a modulation index of 0.5. In AM modulation, the modulation index is kept < 100%, why?
Q2: A modulating signal is used to modulate a carrier signal(AM modulation). Let Pr . Pc. PSB. PuSB. PLSB and u are the total power, carrier power, side band power, upper side band power, lower side band power and modulation index respectively. Prove the following: a. Pc = Pr () c. Pusn = Pisn =) Pr m2 b. Psn = Pr %3D 2+m2 LSB 2+m? (2+m2
6. A400W, 1MHZ carrier is amplitude-modulated with a sinusoidal signal Of 2500HZ. The depth of modulation is 75%. Calculate the sideband frequencies, bandwidth, and power in sidebands and the total power in modulated wave. 5 band wid th
In an AM modulator the message signal is m(t) = coswmit+2coswm2t, and the carrier wave is c(t) = Acosw.t. The modulation index is m = 0.5. a) Determine the amplitude of the carrier wave A. b) Determine the expression of the modulated signal with the AM modulation scheme. c) Determine the expression of the frequency spectrum of the AM modulated signal and then plot the frequency spectrum.
A carrier is modulated simultaneously by two baseband signals . For one signal, the modulation index is 0.3 and the overall modulation index is 0.5. What will be the modulation index for the other baseband signal?
Assume you have the modulated signal of (t) = A sin(4000nt + 90) + Bstn(3600nt + 90) + Bsin(4400nt + 90). Find the A&B values if the sideband powers are 5% of the total power. Assume the carrier power is 75 w.
:A modulating signal is used to modulate a carrier signal(AM modulation). Let Pr , Pc, PSB, PUSB, PLSB and u are the total power, side band power, upper side band power, lower side band power and modulation index respectively. power, carrier Prove the following: a. Pc = Pr (me) m2 b. PSB = Pr m2 PLSB = 72+m2, c. PUSB = Pr 2+m2
Example.3: A modulating signal m(t) = 7csin28. 10³nt modulates a carrier signal, A. Cos (2rf.t). Find the frequency deviation and modulation index of the resulting FM signal. Use k= 8 kHz/volt.
Q16. A 270kHz sinusoidal carrier of amplitude 5V is frequency modulated by a 4.5kHz sinusoidal information signal of amplitude 3V. Assume the modulation index as 2.41. i) Refer the Bessel function table B16 and Sketch the voltage spectrum for the above signal. ii) Calculate maximum frequency and maximum frequency deviation for the above FM signal iii) Identify whether the above equation corresponds to Narrowband or Wideband FM modulator. Table B16: Values of Bessel function Modulation Sideband index Carrier 1 2 3 4 5 6 8 9 10 11 12 13 14 15 16 0.00 1.00 0.25 0.98 0.12 0.5 0.94 0.24 0.03 1.0 0.77 0.44 0.11 0.02 1.5 0.51 0.56 0.23 0.06 0.01 2.0 0.22 0.58 0.35 0.13 0.03 2.41 0.52 0.43 0.20 0.06 0.02 2.5 -0.05 0.50 0.45 0.22 0.07 0.02 0.01 3.0 -0.26 0.34 0.49 0.31 0.13 0.04 0.01 4.0 -0.40 -0.07 0.36 0.43 0.28 0.13 0.05 0.02 5.0 -0.18 -0.33 0.05 0.36 0.39 0.26 0.13 0.05 0.02 5.53 -0.34 -0.13 0.25 0.40 0.32 0.19 0.09 0.03 0.01 6.0 0.15 -0.28 -0.24 0.11 0.36 0.36 0.25 0.13 0.06 0.02 7.0 0.30…
If the carrier signal is given as c(t)=5cos10000t, and the modulating signal is given as m (t) = 4e2rtthen the power (in watt) of the modulated DSB-SC signal is:
Q2: A modulating signal is used to modulate a carrier signal(AM modulation). Let Pr , Pc, Psa. PusB, PLSB and u are the total power, carrier power, side band power, upper side band power, lower side band power and modulation index respectively. Prove the following: a. Pc = Pr () c. Pusp = Pasa =) P, 2+m2. b. PsB = Pr %3D 2+m2 2 (2+m2
i)Modulation process takes place in the modulator with two injection signals namely data orinformation and carrier. It is a vital step in generating a decent signal for electronic communication.Whenever the carrier is modulated by the information signal, new signals at different frequenciesare generated as part of the process. These new frequencies occur in the frequency spectrum withinthe range of the carrier frequency. Conclude these frequencies and mathematically explain itsgeneration with the help of diagrams. A) Upper sideband and lower broadbandB) Lower sidefloor and upperside floorC) Lower peak and upper peakD) Upper sideband and lower sidebandE) Lower bandwidth and upper gainF) All of the aboveG) None of the above