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please show all work (15 Points) An AM modulator has output xdt)-25cos[2t(150)th5cos[2π( 160)t] +5cos2r(140) ] Determine...
3.14 The output signal from an AM modulator is 11 (1)-5 cos l 800π t + 20 cos 2000π t + 5 cos 2200 π . 1. Determine the modulating signal m() and the carrier c (t) 2. Determine the modulation index. 3. Determine the ratio of the power in the sidebands to the power in the carrier.
4. (20%) An AM modulator operates with the message signal m(t) - 9 cos(207t)-8 cos(60!). The unmodulated carrier is given by 110 cos 200r), and the system operates with an index of 0.8. (10%) (a) Given that the minimum value ofm(t) is-12.9, write the equation for m, (t). and determine the power of m,(r) (i.e.. m,())) (b) Determine the efficiency of the modulator 5%) (500) (c) Sketch the double-sided spectrum of the modulator output AM signal.
4. (20%) An AM...
3.8 An AM modulator operates with the message signal m(t)-9 cos(20π)--8 cos(60π) m(t) = 9 cos(20π) + 8 cos(60x1) The unmodulated carrier is given by 110cos(200)Same steps with another signal. and the system operates with an index of 0.8 the system operates with an indet or (a) Write the equation for ma(t), the normalized sig- nal with a minimum value of- (b) Determine (m the power in m (c) Determine the efficiency of the modulator (d) Sketch the double-sided spectrum...
signals and communications 2
Make sure you show all working and describe each step in your calculations. 1. A signum function is defined as sgn(t) = { 1、12 0 1 t<0 Plot and express this function in terms of the unit-step function. 5 marks/ Determine and plot the even and odd parts of the signal 2. x(t) (te-3 +2)u(t). 5 marks 3. If prove that y[n-m] = x[n-m] * h[n]. 5 marks 4. Assuming α > 0, plot the signal...
[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...
Please show all the step for calculation question and
theroy for multi chosse why that is right one
QUESTION9 When comparing FM and PM which of the following is true? O For the same modulation index and message frequency the bandwidth is the same for both PM and FM O For the same modulation index and message frequency the bandwidth is higher for PM than FM O For the same modulation index and message frequency the bandwidth is lower for...
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To determine the 5 key points, you want to determine the x-coordinates of each quarter period. For exam sin(Bx + C), you want to set Bx + C equal to ple, to graph a function in the form y 0巨,T,T, and 2π to determine the new x-coordinates that you will use in your graphs. ch a detailed graph for each of the following functions. Graph at least one full period, indicating the...
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3. x"(t) - y'(t) = -2t x'(t) + y"(t) = 0 x(O) = 0; y(0)=0; x'0) = 0; y'(0) = 0
Consider two periodic signals, please
(a) determine and draw the output of
y(t)=x(2t)*h(t)
if T >8.
(b) Try to figure out and draw the frequency responses of
x(t), h(t), and
y(t).
x(t) hết) WWW.HBHB (in) (b)
Please show all the necessary steps to get the
answers
Answer
Q5 A given DSB-LC transmitter develops an unmodulated power output of 100W across a 50 ? resistive load. When a sinusoidal test tone with a peak amplitude of 5.0 V is applied to the input of the modulator, it is found that the average power output increases by 50% under these conditions. Determine (a) (b) (c) (d) (e) The average power output in each sideband. The modulation index. The...