![3. An amplitude-modulated (AM) signal is given by s(t)-[12+7cos(π-π/3)]cos(13m). (a) Express s(t) in the form of A cos( +4)-A, cos(o,t + φ2) + A3 cos(wyt + φ3). (b) Sketch the amplitude and phase spectra of s(t)](http://img.homeworklib.com/questions/892c7aa0-5849-11eb-b084-0b0b45ae2363.png?x-oss-process=image/resize,w_560)
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3. An amplitude-modulated (AM) signal is given by s(t)-[12+7cos(π-π/3)]cos(13m). (a) Express s(t) in the form of...
A carrier signal c(?) = ? cos(??) is modulated by a single-tone signal ?(?) = ?...
A carrier signal c(?) = ? cos(??) is modulated by a single-tone signal ?(?) = ? ???(??) to form the AM signal: s(t)= [? + ????(??)]???(??), where ? = 10, ? = 2, ? = 1000 ??, ? = 50 ??. a- Obtain an expression for the sidebands of ?(?). b- Sketch ?(?) c- Sketch the spectra |?(?)|, |?(?)|, |?(?)| against f. d- Calculate the modulation index (m) e- What bandwidth is required to transmit the AM signal. f- Show...
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.
Given the following signal f(t) = 2j-4sin (100t-40)-10 cos (60t + π-70) a) Plot the one-sided amp...
Given the following signal f(t) = 2j-4sin (100t-40)-10 cos (60t + π-70) a) Plot the one-sided amplitude and phase spectra. [8 Marks] Plot the two-sided amplitude and phase spectra. Calculate the power of the signal. Is the above signal periodic? If yes, find its period.
Given the following signal f(t) = 2j-4sin (100t-40)-10 cos (60t + π-70) a) Plot the one-sided amplitude and phase spectra. [8 Marks]
Plot the two-sided amplitude and phase spectra.
Calculate the power of the signal....
4: An AM signal has the form s(t) = A (1 + il cos(mt) cos wet...
4: An AM signal has the form s(t) = A (1 + il cos(mt) cos wet with wm <we and u <1. The signal is to be demodulated using the simple envelope detector shown in the following plot. AM sinal (a) Sketch v.(t) when wm <1/RC <we (b) Comment on suitability of such an envelope detector for demodulating an amplitude modu- lated signal: (i) With both sideband and full carrier as in the AM radio system. (ii) With full carrier...
1. Given a baseband signal m(t) sin(1000mt) cos(3000nt) + cos(3700nt a. Sketch the spectrum of m(...
1. Given a baseband signal m(t) sin(1000mt) cos(3000nt) + cos(3700nt a. Sketch the spectrum of m(t) (Hint. sin(a) cos(b) 0.5 sin(a +b) +0.5sin a-b)) b. Sketch the spectrum of DSB-CS signal m(t)cos(10000mt) C ldentify the upper sideband {USB) and lower sideband (LSB) spectra d. Give the black diagram of the receiver to receive DSB-CS signal in (b). 2. baseband signal m(r)--0.5 + Σ..小(t-n)-u(t-0.5-n)] where ult) is the Given unit step function, an amplitude modulated signal is as SAM 107+ m(0cos...
[15 points] You are asked to design a DSB-SC AM modulator to generate a modulated signal km(t)cos...
[15 points] You are asked to design a DSB-SC AM modulator to generate a modulated signal km(t)cos(wt+0), where m(t) is a signal band-limited to B Hz. The following figure shows a DSB- SC AM modulator available in the stockroom. The carrier generator available generates not cos(wct), but cos (wct). Explain whether you would be able to generate the desired signal using only this equipment. You may use any kind of filter you like. 3. What kind of filter is required...
When a baseband signal m(t) = cos(1000t)cos(3000t) is AM modulated using a carrier cos(10,000t), a) Find the...
When a baseband signal m(t) = cos(1000t)cos(3000t) is AM modulated using a carrier cos(10,000t), a) Find the frequency components in the baseband signals and in the AM signal. [2] b) Sketch the spectrum, carefully label the graph. c) Find the power efficiency, n. [1] [1]
Question 4: (20 points) An FM signal is modulated with message m(t)Am cos(2Tmt). The measured amp...
Question 4: (20 points) An FM signal is modulated with message m(t)Am cos(2Tmt). The measured amplitude spectrum, SPM(f), is shown below: Amplitude spectrum of the frequency modulated signal 2 -2 5000 4000 3000 2000 -1000 1000 2000 3000 4000 5000 frequency f [Hz] a) What is the carrier frequency fe? b) What is the message frequency fm c) What is the FM modulation index Bf? Is it a narrowband or a wideband signal? d) Using Carson's rule, estimate the transmission...
Assume that an AM transmitter is modulated with a video testing signal given by em(t) =...
Assume that an AM transmitter is modulated with a video testing signal given by em(t) = =20 + 60 sin (2πf1t), where f1 = 3.57 MHz. Let the carrier signal c(t) = Ac cos(2πfct), where Ac = 100 and fc = 100 MHz. The AM signal is fed into a 50-Ω load. (a) Derive an expression for the AM DSB-FC signal in time domain. (b) Construct the AM waveform, giving numerical values of the maximum amplitude, Amax and the minimum...
1) Find out the amplitude, frequency and phase displacement for given QPSK signal F(t)=100 cos(25t+π/4). 2)...
1) Find out the amplitude, frequency and phase displacement for given QPSK signal F(t)=100 cos(25t+π/4). 2) For given data incorporate with odd parity and even parity (a) 11011011 (with parity bit) (b) 1 11011011 (without parity bit)
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.
Given the following signal f(t) = 2j-4sin (100t-40)-10 cos (60t + π-70) a) Plot the one-sided amplitude and phase spectra. [8 Marks] Plot the two-sided amplitude and phase spectra. Calculate the power of the signal. Is the above signal periodic? If yes, find its period.
Given the following signal f(t) = 2j-4sin (100t-40)-10 cos (60t + π-70) a) Plot the one-sided amplitude and phase spectra. [8 Marks]
Plot the two-sided amplitude and phase spectra.
Calculate the power of the signal....
4: An AM signal has the form s(t) = A (1 + il cos(mt) cos wet with wm <we and u <1. The signal is to be demodulated using the simple envelope detector shown in the following plot. AM sinal (a) Sketch v.(t) when wm <1/RC <we (b) Comment on suitability of such an envelope detector for demodulating an amplitude modu- lated signal: (i) With both sideband and full carrier as in the AM radio system. (ii) With full carrier...
1. Given a baseband signal m(t) sin(1000mt) cos(3000nt) + cos(3700nt a. Sketch the spectrum of m(t) (Hint. sin(a) cos(b) 0.5 sin(a +b) +0.5sin a-b)) b. Sketch the spectrum of DSB-CS signal m(t)cos(10000mt) C ldentify the upper sideband {USB) and lower sideband (LSB) spectra d. Give the black diagram of the receiver to receive DSB-CS signal in (b). 2. baseband signal m(r)--0.5 + Σ..小(t-n)-u(t-0.5-n)] where ult) is the Given unit step function, an amplitude modulated signal is as SAM 107+ m(0cos...
[15 points] You are asked to design a DSB-SC AM modulator to generate a modulated signal km(t)cos(wt+0), where m(t) is a signal band-limited to B Hz. The following figure shows a DSB- SC AM modulator available in the stockroom. The carrier generator available generates not cos(wct), but cos (wct). Explain whether you would be able to generate the desired signal using only this equipment. You may use any kind of filter you like. 3. What kind of filter is required...
When a baseband signal m(t) = cos(1000t)cos(3000t) is AM modulated using a carrier cos(10,000t), a) Find the frequency components in the baseband signals and in the AM signal. [2] b) Sketch the spectrum, carefully label the graph. c) Find the power efficiency, n. [1] [1]
Question 4: (20 points) An FM signal is modulated with message m(t)Am cos(2Tmt). The measured amplitude spectrum, SPM(f), is shown below: Amplitude spectrum of the frequency modulated signal 2 -2 5000 4000 3000 2000 -1000 1000 2000 3000 4000 5000 frequency f [Hz] a) What is the carrier frequency fe? b) What is the message frequency fm c) What is the FM modulation index Bf? Is it a narrowband or a wideband signal? d) Using Carson's rule, estimate the transmission...
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