1->Clearly explain the differences between DSB-SC and Standard AM both in time domain and frequency domain....
1->Clearly explain the differences between DSB-SC and Standard AM both in time domain and frequency domain.
2-> Comment on the amplitude of received message signal and explain the duty of low-pass filter.
Homework Answers
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1->Clearly explain the differences between DSB-SC and
Standard AM both in time domain and frequency domain....
[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...
AM Modulator AM Demodulator m(t) SAM-DSB-Sc(t) mdemod(t) LPF cos2nfct cos2nfct Figure 1 P1. For the system...
AM Modulator AM Demodulator m(t) SAM-DSB-Sc(t) mdemod(t) LPF cos2nfct cos2nfct Figure 1 P1. For the system shown in Figure 1, sketch the signals m(t), SAM-DSB-sc(t), and mde mod (t) in the time and frequency domain, assuming m(t)=cos 20rd and that AM- DSB-SC is the modulation scheme used with f. = 100Hz P2. Repeat P1 changing m(t) to a 10 Hz square wave, with amplitude 1 (Figure 2) s(t) t 0.05 0.1 Figure 2
1. In the demodulation DSB-SC AM signals, there is a need for a phase-coherent or synchronous...
1. In the demodulation DSB-SC AM signals, there is a need for a phase-coherent or synchronous demodulator for recovering the message signal from the received signal. That is, the phase of the locally generated sinusoid should ideally be equal to the phase of the received carrier. What are the ways by which a sinusiod at the receiver can be generated phase-locked to the phase of incoming carrier signal ? Explain with the aid of block diagrams, and discuss their advantages...
Please answer FAST ASAP I will rate you thumbs up ?? (1) What are the reasons...
Please answer FAST ASAP I will rate you thumbs up
??
(1) What are the reasons behind the need of modulation for radio transmission, i.e., why not directly transmit the original signal? Q2) A carrier signal with frequency f. Hz is double-sideband suppressed carrier (DSB-SC) amplitude modulated by a triangular shaped message signal, m(t), plotted below (Fig. Q2). The DSB-SC amplitude modulated signal is then passed from a band-pass filter with center frequency fc-Im and bandwidth 2fm where fm =...
AM Modulator AM Demodulator m(t) SAM-DSB-Sc(t) mdemod(t) LPF cos2nfct cos2nfct Figure 1 P1. For the system...
AM Modulator AM Demodulator m(t) SAM-DSB-Sc(t) mdemod(t) LPF cos2nfct cos2nfct Figure 1 P1. For the system shown in Figure 1, sketch the signals m(t), SAM-DSB-sc(t), and mde mod(t) in the time and frequency domain, assuming m(t)=cos 20ra and that AM- DSB-SC is the modulation scheme used with f. = 100Hz
3. The following is the amplitude spectrum of a DSB+carrier AM signal x(f) 1.5 1.5 1.5 1.5 f (Hz)...
3. The following is the amplitude spectrum of a DSB+carrier AM signal x(f) 1.5 1.5 1.5 1.5 f (Hz) 1920 2000 2080 2080 2000 1920 (a) (10 points) Determine the carrier frequency fe the carrier amplitude Ac the mod ulation index ,, and the message signal m(t) of the AM signal. (b) (10 points) Given that μ2Sm 0.18, find the output SNR (in dB) if the received signal includes white noise with a power spectral density of η/2-10-10 W/Hz. (c)...
Assume m(t) is a 10 Hz square wave, with amplitude 1, and that AM-DSB-C is the...
Assume m(t) is a 10 Hz square wave, with amplitude 1,
and that AM-DSB-C is the modulation scheme used with fc =
100Hz.
AM Modulator AM Demodulator m(t) SAM-DSB-sc(t) mdemod(t) LPF cos2nfct cos21fct S Figure 1 P1. For the system shown in Figure 1, sketch the signals mſt), mde mod (t) in the time and frequency domain c(t), and AM-DSB-SC
Please write clearly Expert Q&A Done 6. (A) What is an amplitude modulation (AM)? [) A...
Please write clearly
Expert Q&A Done 6. (A) What is an amplitude modulation (AM)? [) A baseband message signal mt) is shown below. b shows the frequency spectrum of mýtj. A carrier signal cost was used in DSB-SC AM moduition of m/t). Describe how the modulated signal can be created (is) Draw the frequency spectrum of modulated signal. (iv) Describe how the message signal demodulated and recovered at the receiving side. (4 5 20 points)
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.
can you please solve this problem step by step, thank you!! 1. Consider a DSB-SC signal...
can you please solve this problem step by step, thank
you!!
1. Consider a DSB-SC signal with noise passes through a demodulator shown below. ViC0) 2(0) но но 0) The input signal plus noise is v,(t)-5,() + n'(t) where 5,0): Am(1)cos2r/rt, m(1) cos 2π/J is the message signal with f-</м , carrier frequency is f> fe , and noise n' (r) has power spectral density function G,じ)= η . The local carrier is v,(1)s 2 cosZrw. The carrier filter is...
[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...
AM Modulator AM Demodulator m(t) SAM-DSB-Sc(t) mdemod(t) LPF cos2nfct cos2nfct Figure 1 P1. For the system shown in Figure 1, sketch the signals m(t), SAM-DSB-sc(t), and mde mod (t) in the time and frequency domain, assuming m(t)=cos 20rd and that AM- DSB-SC is the modulation scheme used with f. = 100Hz P2. Repeat P1 changing m(t) to a 10 Hz square wave, with amplitude 1 (Figure 2) s(t) t 0.05 0.1 Figure 2
1. In the demodulation DSB-SC AM signals, there is a need for a phase-coherent or synchronous demodulator for recovering the message signal from the received signal. That is, the phase of the locally generated sinusoid should ideally be equal to the phase of the received carrier. What are the ways by which a sinusiod at the receiver can be generated phase-locked to the phase of incoming carrier signal ? Explain with the aid of block diagrams, and discuss their advantages...
Please answer FAST ASAP I will rate you thumbs up
??
(1) What are the reasons behind the need of modulation for radio transmission, i.e., why not directly transmit the original signal? Q2) A carrier signal with frequency f. Hz is double-sideband suppressed carrier (DSB-SC) amplitude modulated by a triangular shaped message signal, m(t), plotted below (Fig. Q2). The DSB-SC amplitude modulated signal is then passed from a band-pass filter with center frequency fc-Im and bandwidth 2fm where fm =...
AM Modulator AM Demodulator m(t) SAM-DSB-Sc(t) mdemod(t) LPF cos2nfct cos2nfct Figure 1 P1. For the system shown in Figure 1, sketch the signals m(t), SAM-DSB-sc(t), and mde mod(t) in the time and frequency domain, assuming m(t)=cos 20ra and that AM- DSB-SC is the modulation scheme used with f. = 100Hz
3. The following is the amplitude spectrum of a DSB+carrier AM signal x(f) 1.5 1.5 1.5 1.5 f (Hz) 1920 2000 2080 2080 2000 1920 (a) (10 points) Determine the carrier frequency fe the carrier amplitude Ac the mod ulation index ,, and the message signal m(t) of the AM signal. (b) (10 points) Given that μ2Sm 0.18, find the output SNR (in dB) if the received signal includes white noise with a power spectral density of η/2-10-10 W/Hz. (c)...
Assume m(t) is a 10 Hz square wave, with amplitude 1,
and that AM-DSB-C is the modulation scheme used with fc =
100Hz.
AM Modulator AM Demodulator m(t) SAM-DSB-sc(t) mdemod(t) LPF cos2nfct cos21fct S Figure 1 P1. For the system shown in Figure 1, sketch the signals mſt), mde mod (t) in the time and frequency domain c(t), and AM-DSB-SC
Please write clearly
Expert Q&A Done 6. (A) What is an amplitude modulation (AM)? [) A baseband message signal mt) is shown below. b shows the frequency spectrum of mýtj. A carrier signal cost was used in DSB-SC AM moduition of m/t). Describe how the modulated signal can be created (is) Draw the frequency spectrum of modulated signal. (iv) Describe how the message signal demodulated and recovered at the receiving side. (4 5 20 points)
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.
can you please solve this problem step by step, thank
you!!
1. Consider a DSB-SC signal with noise passes through a demodulator shown below. ViC0) 2(0) но но 0) The input signal plus noise is v,(t)-5,() + n'(t) where 5,0): Am(1)cos2r/rt, m(1) cos 2π/J is the message signal with f-</м , carrier frequency is f> fe , and noise n' (r) has power spectral density function G,じ)= η . The local carrier is v,(1)s 2 cosZrw. The carrier filter is...
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