Homework Answers
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I have provided a complete answer to the images. The key takeaway from the problem is how a cos(2.pi.fc.t) modulates the signal in the frequency domain.
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1. A modulating signal m(t) is given by m(t) = (cos(20nt) – cos(40nt)) a. Find and...
1. A modulating signal m(t) is given by m(t) = (cos(20nt) – cos(40ſt)) a. Find and...
1. A modulating signal m(t) is given by m(t) = (cos(20nt) – cos(40ſt)) a. Find and sketch the spectrum of DSB-SC signal 2m(t)cos (100nt) b. Verify that the DSB-SC modulated signal can be recovered using coherent detection. 15 nts
1. A modulating signal m(t) is given by m(t) = 5 (cos(20nt) – cos(40nt)) a. Find...
1. A modulating signal m(t) is given by m(t) = 5 (cos(20nt) – cos(40nt)) a. Find and sketch the spectrum of DSB-SC signal 2m(t)cos (100nt) b. Verify that the DSB-SC modulated signal can be recovered using coherent detection.
4. [20 points] A modulating signal m(t) is given by m(t)-cos(100nt)cos(500nt): 1) [5 points] Sketch the...
4. [20 points] A modulating signal m(t) is given by m(t)-cos(100nt)cos(500nt): 1) [5 points] Sketch the spectrum of m(t). 2) [5 points] Find and sketch the spectrum of the DSB-SC signal 2m(t)cos(1000t). 3) [5 points] From the spectrum obtained in 2), suppress the LSB to obtain the USB spectrum and sketch it. 4) [5 points] Knowing the USB spectrum in 3), write the expression puse(t) for the USB signal For full credit, label frequencies and magnitudes of the spectra for...
of the LSB spectrum plucedure to also find PuSB ). A modulating signal m(t) įs given...
of the LSB spectrum plucedure to also find PuSB ). A modulating signal m(t) įs given by: (a) m(1)=cos 100π 1+2cos 300 (b) m()= sin 10Ort sin 500ml In each case: (i) Sketch the spectrum of m(t). (ii) Find and sketch the spectrum of the DSB-SC signal 2m(r) cos 1000 4.4.3 . ppress the LSB spectrum to obtain the USB spectrum. (iv) Knowing the USB spectrum in part (i), write the expression pusa(0) for the USB signal (v) Repeat parts...
4.4-4 Find LSR (t) and USB (1) for the modulating signal m(t) = 7B sinc (27...
4.4-4 Find LSR (t) and USB (1) for the modulating signal m(t) = 7B sinc (27 BI) with B = 2000 Hz and carrier frequency fe = 10,000 Hz. Follow these steps: (a) Sketch spectra of m(t) and the corresponding DSB-SC signal 2m(t) cos wcl. (b) To find the LSB spectrum, suppress the USB in the DSB-SC spectrum found in part (a). (c) Find the LSB signal LSB (t), which is the inverse Fourier transform of the LSB spectrum found...
please answer all parts and write clearly thank you 4.5-1 A modulating signal m(t) is given...
please answer all parts
and write clearly
thank you
4.5-1 A modulating signal m(t) is given by (a) m (t) = cos 1001 (b) m(t)cos 100r2 cos 300t (c) m(t)cos 100r cos 500 In each case: 1) Sketch the spectrum of mt) (ii) Find and sketch the spectrum of the DSB-SC signal 2m(t) cos 1000 ii) From the spectrum oblained in (ii), suppress the LSB spectrum to obtain the USB spectrum. (iv) Knowing the USB spectrum in (ii), write the...
A modulating signal m(t) is given by: ?(?) = ??? 100?? + 2 ??? 300?? Find...
A modulating signal m(t) is given by: ?(?) = ??? 100?? + 2 ??? 300?? Find the spectrum of DSB-SC signal 2?(?)*??? 1000?t
Problem A DSB-SC AM signal is modulated by the signal m(t) = cos(4000st) - cos(1000nt). The...
Problem A DSB-SC AM signal is modulated by the signal m(t) = cos(4000st) - cos(1000nt). The modulated signal is u(t) = 200 m(t) cos(21tfct), where f=1 MHz. 1. Determine and sketch the spectrum of the AM signal. 2. Determine the average power in the frequency components 3. Find a resonable choice of R and C to design an envelope detector for this DSB-SC AM signal.
4. Given a modulating signal m(t) = 2cos (100nt) + 2cos (250nt) + 2sin (100nt) is...
4. Given a modulating signal m(t) = 2cos (100nt) + 2cos (250nt) + 2sin (100nt) is modulated using AM SSB-SC using fe at 1000 Hz. (a) Draw by hand, the magnitude spectra of the modulated signal, retaining the Lower Sidebands, for the appropriate frequency range in Hz. (4) (b) Diagram and explain the demodulation and filtering process to retrieve m(t). (4) (c) What must be modified in the modulation and demodulation processes if you were to implement AM VSB vs....
Problem 2 (40 points) Suppose that the modulating (message) signal is m(t)-500si ne(4000πt) and the carrier frequency is o20000x rad/s (see the definition of the sinc function at the bottom of the ne...
Problem 2 (40 points) Suppose that the modulating (message) signal is m(t)-500si ne(4000πt) and the carrier frequency is o20000x rad/s (see the definition of the sinc function at the bottom of the next page). a) Write the mathematical expression of M(o) and sketch it (label the axes carefully). Let qDSB-Sc (t)-2m(t)cos.. Write the mathematical expression of φ)DSB-SC(w) and sketch it (label the axes carefully). b) c) Suppress the USB in the DSB-SC spectrum you sketched in (b) to find the...
1. A modulating signal m(t) is given by m(t) = (cos(20nt) – cos(40ſt)) a. Find and sketch the spectrum of DSB-SC signal 2m(t)cos (100nt) b. Verify that the DSB-SC modulated signal can be recovered using coherent detection. 15 nts
1. A modulating signal m(t) is given by m(t) = 5 (cos(20nt) – cos(40nt)) a. Find and sketch the spectrum of DSB-SC signal 2m(t)cos (100nt) b. Verify that the DSB-SC modulated signal can be recovered using coherent detection.
4. [20 points] A modulating signal m(t) is given by m(t)-cos(100nt)cos(500nt): 1) [5 points] Sketch the spectrum of m(t). 2) [5 points] Find and sketch the spectrum of the DSB-SC signal 2m(t)cos(1000t). 3) [5 points] From the spectrum obtained in 2), suppress the LSB to obtain the USB spectrum and sketch it. 4) [5 points] Knowing the USB spectrum in 3), write the expression puse(t) for the USB signal For full credit, label frequencies and magnitudes of the spectra for...
of the LSB spectrum plucedure to also find PuSB ). A modulating signal m(t) įs given by: (a) m(1)=cos 100π 1+2cos 300 (b) m()= sin 10Ort sin 500ml In each case: (i) Sketch the spectrum of m(t). (ii) Find and sketch the spectrum of the DSB-SC signal 2m(r) cos 1000 4.4.3 . ppress the LSB spectrum to obtain the USB spectrum. (iv) Knowing the USB spectrum in part (i), write the expression pusa(0) for the USB signal (v) Repeat parts...
4.4-4 Find LSR (t) and USB (1) for the modulating signal m(t) = 7B sinc (27 BI) with B = 2000 Hz and carrier frequency fe = 10,000 Hz. Follow these steps: (a) Sketch spectra of m(t) and the corresponding DSB-SC signal 2m(t) cos wcl. (b) To find the LSB spectrum, suppress the USB in the DSB-SC spectrum found in part (a). (c) Find the LSB signal LSB (t), which is the inverse Fourier transform of the LSB spectrum found...
please answer all parts
and write clearly
thank you
4.5-1 A modulating signal m(t) is given by (a) m (t) = cos 1001 (b) m(t)cos 100r2 cos 300t (c) m(t)cos 100r cos 500 In each case: 1) Sketch the spectrum of mt) (ii) Find and sketch the spectrum of the DSB-SC signal 2m(t) cos 1000 ii) From the spectrum oblained in (ii), suppress the LSB spectrum to obtain the USB spectrum. (iv) Knowing the USB spectrum in (ii), write the...
Problem A DSB-SC AM signal is modulated by the signal m(t) = cos(4000st) - cos(1000nt). The modulated signal is u(t) = 200 m(t) cos(21tfct), where f=1 MHz. 1. Determine and sketch the spectrum of the AM signal. 2. Determine the average power in the frequency components 3. Find a resonable choice of R and C to design an envelope detector for this DSB-SC AM signal.
4. Given a modulating signal m(t) = 2cos (100nt) + 2cos (250nt) + 2sin (100nt) is modulated using AM SSB-SC using fe at 1000 Hz. (a) Draw by hand, the magnitude spectra of the modulated signal, retaining the Lower Sidebands, for the appropriate frequency range in Hz. (4) (b) Diagram and explain the demodulation and filtering process to retrieve m(t). (4) (c) What must be modified in the modulation and demodulation processes if you were to implement AM VSB vs....
Problem 2 (40 points) Suppose that the modulating (message) signal is m(t)-500si ne(4000πt) and the carrier frequency is o20000x rad/s (see the definition of the sinc function at the bottom of the next page). a) Write the mathematical expression of M(o) and sketch it (label the axes carefully). Let qDSB-Sc (t)-2m(t)cos.. Write the mathematical expression of φ)DSB-SC(w) and sketch it (label the axes carefully). b) c) Suppress the USB in the DSB-SC spectrum you sketched in (b) to find the...
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