1) Show that any scheme that can be used to generate DSB-SC can also generate AM and any scheme t...
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
[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
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
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.
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.
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...
4.3-1 Figure P4.3-1 shows a scheme for coherent (synchronous) demodulation. Show that this scheme can demodulate the AM signal [A + m(t)cos (24fc1) regardless of the value of A> Figure P.4.3-1 (A + m(t)] cos wet Output Lowpass filter cos, we?
AM Modulator AM Demodulator m(t) mdemod(t) SAM-DSB-C(t) LPF Х Х с cos21fct cos2nfct Figure 3 P3. For the system shown in Figure 3, sketch the signals m(t), SAM-DSP-c(t), and mde mod(t) in the time and frequency domain, assuming m(t)=cos 20rd and that AM- DSB-C is the modulation scheme used with f. = 100Hz. Use DC offset c=1. P4. Repeat P3 changing m(t) to a 10 Hz square wave, with amplitude 1 (Figure 2). P5. Repeat P3 and P4, using DC...
please show all work (1) Compute the SNR at reception for the following scenarios: (Provide answers in dB.) (4 points each) (a) AM DSB-LC system with input SNR of 110 and m(u)=0.9. (b) AM DSB-SC system with input SNR of 6 dB. (c) AM SSB-SC system with input SNR of 25. (d) A two stage system, with an AM DSB-SC stage with input SNR of 15 that feeds into an AM DSB-LC stage with m(u) - 0.75. (2) A modulating...