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A bandpass signal with carrier frequency 1482 Hz is a bandwidth of 154 Hz. This signal is mixed w...
The signal ?(?) = cos200?? + 0.25cos700?? is sampled at the rate of 400 samples per...
The signal ?(?) = cos200?? + 0.25cos700?? is sampled at the rate of 400 samples per second. Sampled waveform is then passes through an ideal low pass filter with 200 Hz bandwidth. Write an expression for filter output. Sketch the frequency spectrum of sampled signal.
Prob. 5 (a) Consider the FM signal with modulation index B 2 is passed through an ideal band-pass...
Prob. 5 (a) Consider the FM signal with modulation index B 2 is passed through an ideal band-pass filter (BPF) with mid-band frequency f and bandwidth 5f. where f is the carrier frequency and fmis the frequency of the baseband modulating signal (i) Sketch the spectrum of the BPF output. (ii) Determine the fraction of the power of the FM signal that is present at the output of the filter (b) Consider the FM signal given by фFM (t)-100 cos...
) frequency modulatea100KHz carrier to produce the fl loo p narrowband FM signal: 120 pts PrBndt)...
find value of flo????
) frequency modulatea100KHz carrier to produce the fl loo p narrowband FM signal: 120 pts PrBndt) _ 5 cos (2a2. 10st + 0.0025 sin 2π 104t ) agram design) the wideband FM signal wrt) with carmer frequency of 100 MHz and a (peak) frequency deviation of So R Frequency Multipliers of any value following are available for the design Assume that the frequency can be tuned to any value between 200 나 A local oscillator whose...
36. Sampling a low-pass signal. A signal x(t) = sin( 1,000.71) is sampled at the rate...
36. Sampling a low-pass signal. A signal x(t) = sin( 1,000.71) is sampled at the rate of F, and sent through a unity-gain ideal low-pass filter with the cutoff frequency at F,/2. Find and plot the Fourier transform of the reconstructed signal z(t) at filter's output if a. F=20 kHz b. Fs =800 Hz
Frequency multiplication. Sample x(t) = cos 3πt at the rate of 4 Hz and send impulse...
Frequency multiplication. Sample x(t) = cos 3πt at the rate of 4 Hz and send impulse samples through an ideal low-pass filter with the cutoff frequency at fc and gain = 1/4. Find and plot the Fourier transform of the reconstructed signal z(t) and its time expression for fc = 2, 3, 4, 5, 6 Hz.
number 2 ECE 300 Continuous-Time Signals and Systems H(jø π/2 Plot the spectrum Z (jø) of the filtered input signal z()...
number 2
ECE 300 Continuous-Time Signals and Systems H(jø π/2 Plot the spectrum Z (jø) of the filtered input signal z(), the spectrum Z, (jo) of the sampled signal z.(t), and the spectrum Y(ja) of the reconstructed signal y(t). Show clearly how the output spectrum Y (ja) differs from the original spectrum G(jo) C. Which system, A or B, produces less distortion between the input g(t) and the output y(4) or ()? Explain. You can measure distortion by finding the...
For a lowpass signal with a bandwidth of 6000 Hz, what is the minimum sampling frequency...
For a lowpass signal with a bandwidth of 6000 Hz, what is the minimum sampling frequency for perfect reconstruction of the signal? What is the minimum required sampling frequency if a guard band of 2000 Hz is required? What is the minimum required sampling frequency and the value of K for perfect reconstruction if the nstruction filter has the following frequency response lfl 7000 K-Kino 7000, 0, H(f) = 7000 < lfl < 10000) otherwise
The following periodic signal is input to an ideal low pass filter of bandwidth 25 KHz. 1. x(t) 2...
The following periodic signal is input to an ideal low pass filter of bandwidth 25 KHz. 1. x(t) 2 a) Determine the average power of the signal x(t). b) If T 0.1 ms, give the output of the filter as a function of time, y(t) e) Determine the average power of the signal y(t) d) Determine the bandwidth of the signal y(), considered as a baseband signal. e) Now assume that the signal x() (with T-0.1 ms) is instead input...
When the message signal m (t) =cos (2π fmt) and the carrier signal is c(t)=cos (2π fct) , fm<&...
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...
8.4 Mixers 8.21* An AM signal is transmitted on an 800-kHz carrier. The baseband frequency range...
8.4 Mixers 8.21* An AM signal is transmitted on an 800-kHz carrier. The baseband frequency range extends from 100 Hz to 5 kHz. This signal is to be detected by a superheterodyne receiver with a 55-kHz intermediate frequency. (a) What is the frequency of the local oscillator? (b) What must be the Q of the IF stages if the 1-dB points are to correspond to the maximum and minimum frequencies of the IF signal?
Prob. 5 (a) Consider the FM signal with modulation index B 2 is passed through an ideal band-pass filter (BPF) with mid-band frequency f and bandwidth 5f. where f is the carrier frequency and fmis the frequency of the baseband modulating signal (i) Sketch the spectrum of the BPF output. (ii) Determine the fraction of the power of the FM signal that is present at the output of the filter (b) Consider the FM signal given by фFM (t)-100 cos...
find value of flo????
) frequency modulatea100KHz carrier to produce the fl loo p narrowband FM signal: 120 pts PrBndt) _ 5 cos (2a2. 10st + 0.0025 sin 2π 104t ) agram design) the wideband FM signal wrt) with carmer frequency of 100 MHz and a (peak) frequency deviation of So R Frequency Multipliers of any value following are available for the design Assume that the frequency can be tuned to any value between 200 나 A local oscillator whose...
36. Sampling a low-pass signal. A signal x(t) = sin( 1,000.71) is sampled at the rate of F, and sent through a unity-gain ideal low-pass filter with the cutoff frequency at F,/2. Find and plot the Fourier transform of the reconstructed signal z(t) at filter's output if a. F=20 kHz b. Fs =800 Hz
number 2
ECE 300 Continuous-Time Signals and Systems H(jø π/2 Plot the spectrum Z (jø) of the filtered input signal z(), the spectrum Z, (jo) of the sampled signal z.(t), and the spectrum Y(ja) of the reconstructed signal y(t). Show clearly how the output spectrum Y (ja) differs from the original spectrum G(jo) C. Which system, A or B, produces less distortion between the input g(t) and the output y(4) or ()? Explain. You can measure distortion by finding the...
For a lowpass signal with a bandwidth of 6000 Hz, what is the minimum sampling frequency for perfect reconstruction of the signal? What is the minimum required sampling frequency if a guard band of 2000 Hz is required? What is the minimum required sampling frequency and the value of K for perfect reconstruction if the nstruction filter has the following frequency response lfl 7000 K-Kino 7000, 0, H(f) = 7000 < lfl < 10000) otherwise
The following periodic signal is input to an ideal low pass filter of bandwidth 25 KHz. 1. x(t) 2 a) Determine the average power of the signal x(t). b) If T 0.1 ms, give the output of the filter as a function of time, y(t) e) Determine the average power of the signal y(t) d) Determine the bandwidth of the signal y(), considered as a baseband signal. e) Now assume that the signal x() (with T-0.1 ms) is instead input...
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...
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