Maximum frequency is 32 Khz.
Suppose you wish to sample an amplitude modulated signal x(t)-m(t) cos(Q,t) where m(1) is the message...
The message signal m(t) = 2 cos 400t + 3 sin(800t + 22) modulates the carrier signal e(t) A cos(700π) using DSB-SC (dual side band, suppressed carrier) modulations Find the time domain and frequency domain representation of the modulated signal and plot the spectrum (Fourier transform) of the modulated signal. What is power content of the modulated signal?
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...
Find the instantaneous frequency of the next signal at t = 4. (a) x(t) = 10 cos[20xt+10 sin(t/4)) (b) x(t) = 262719) () X(t)=10[cos(2nt) cos(atº/4) + sin(24t) sin( nt/ 4)] Suppose that the information signal is as shown in the following figure. When each modulating this signal using 100KHz as the carrier frequency, find the frequency shift and phase shift when FM is modulated with 5,=10. What is the maximum frequency shift and maximum phase shift? 0.5+ -0.5 ost Suppose...
A single tone message signal, m(t) = 2 cos(211 X 1000 t), (freq. is in Hz) is applied to an FM modulator with the following parameters: Amplitude of the Carrier = 10 (V), Carrier Frequency = 100 (kHz), Frequency sensitivity factor = kx = 103 (Hz/Volt). The modulated signal s(t) is passed through a bandpass filter centered at 102 (kHz) with a bandwidth of 3(kHz), and the output signal sf(t) is obtained. (a) Express the output of the filter, sf(t)...
Question 1 0/1 pts An AM broadcast transmitter is modulated with: m (t)A cos 2Tfit + B cos 2Tf2t where A 0.45 V B- 0.40 V, the carrier frequency is 100 kHz, and the amplitude of the carrier is 125 V. Find the normalized average power of the modulated signal State your answer in Watts, to two decimal places. You Answered 7812.59 Correct Answer 8520.51 margin of error+/-0.02 Question 1 0/1 pts An AM broadcast transmitter is modulated with: m...
When the message signal m (t) =cos (2π fmt) and the carrier signal is c(t)=cos (2π fct) , fm<< fc, The modulated DSB-SC signal SDSB-SC=m(t)cos(2πfct) is generated, and only the upper sideband To generate and transmit the SSB signal. As shown in the figure below, the receiver is a local oscillator cosine signal to the received signal and passes it through a low-pass filter. Answer the following questions. (a) Draw the waveform of DSB-SC modulated signal SDSB-SC(t) (b)Find the result...
A message signal m(t) = sin30nt +3cos200nt is to be modulated by the carrier, 1. cos(20,000nt). (a) Find X(f) (b) Find the DSB-SC signal x(t) and Xf). (c) Sketch the spectrums of |M(G| and |X(f)|. In the spectrum, identify the USB and LSB spectra. (d) Find the message signal power, m2(t). (e) Find the transmitted power, Sr x2(t). (f Find the massage signal bandwidth, B, and the transmitted signal bandwidth, Br. (g) Describe the demodulation process and find the detected...
Consider an AM system. The message signal is given by cos(1000t) volts. The modulated signal is (0.5+acos(1000m))cos(2π.) volts, where α is a positive coefficient, and fe is the carrier frequency. (a) Determine the value of α when the modulation index is 100%. (b) Determine the value of α when the modulation index is 50%. (c) Determine the value of α when the modulation index is 200%. (6 marks) Continue from (1) and suppose α-05. Sketch the spectrum of the transmitted...
3. a. For the message signal m(t)-2sgnit) and unmodulated carrier cos(u,ti, draw the output of phase modulator with m(t) (n/4) cos(ω-') - For the message signal m(t)--2sgn(t) and unmodulated carrier cos(w,t) shown above where -20m, draw the output of frequency modulator with m(t) (k-10n) 3. a. For the message signal m(t)-2sgnit) and unmodulated carrier cos(u,ti, draw the output of phase modulator with m(t) (n/4) cos(ω-') - For the message signal m(t)--2sgn(t) and unmodulated carrier cos(w,t) shown above where -20m, draw...
Consider frequency modulation with a sinusoidal message signal (tone modulation) m(t) = a cos(2πfmt). The modulated signal is: vFM(t) = Ac cos[2πfct + βf sin(2πfmt)]. with βf = kfa/fm being the modulation index. What is the bandwidth of the modulated signal.