EECE 301 NS_14 The 3 Paths

DIGITAL COMMUNICATIONS H.W. Q1/ A) Find the sampling frequency for the following signals: 1) S1 = 20 cos(1500nt) * cos (4000nt) 2) S2 = sin (200xt. 3) S3 = sin4000nt + 5 cos(1200nt) nt B) The following waveform is the RB (return to bios) representation of the serial digital data, find the digital data code and draw the NRZ (non-return to zero) and RZ (return to zero) waveforms. C) waveform below is the PAM for the analog signal, draw the analog signal, PWM and the PPM for this signal. 02/ The following data stream (10011011 11001110 11110000 10001000 11100000 11011010 11111111 01110111 10011001 11100111 01011010) will be transmitted with signaling rate equal to 80 k bit/sec. 1- Find the data transmitted using L- parity, V- parity and L&V parity. 2- Find the Hamming code of the last byte of the data only in which two error can be detected and one error can be corrected, calculate the transmitted bandwidth? how can reduce the transmitted bandwidth? Explain and calculate the reduced…

n Which of the following statements is not correct: O a. A first-order PLL can track a phase step with a zero steady-state error. O b. A first-order PLL can track a frequency step with a zero steady-state error. Oc. A second-order PLL can track a frequency step with zero steady-state error. O d. A third-order PLL can track a frequency step with zero steady-state error.

Consider the following plots of time-domain and frequency-domain signals. Label the axes of the five plots. For example, plot B should be labeled as amplitude vs. time. Characterize each plot as either a time-domain or a frequency-domain signal. Describe the mathematical relationships among the plots. For example, how could you arrive at plot A from plots D and E?

For the system shown:a. Get the equationsb. Simplify and determine C / Rc. Draw the signal flow diagram for this system.

x(+) = cos (10Tt) AAA. Sample the above signal for, a) fs = 5 Hz b) fs = l0 Hz Can x(4) be obtained from sampled signals without loss ? %3D %3D

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1. Use a VCO with frequency sensitivity 2 KHz/mV and quiescent frequency 198 KHz to generate an FM signal s(t) = 10 cos(400лt + (t)), where the unit of time is milliseconds, and the phase (p(t) is as sketched in the following figure. Derive and sketch the input to the VCO. (t) 6л 3 -3 1 2 4 5 6 7 8 00 t (ms)

Write the equations for ØAM(t), ØFM(t) and ОРM), if the modulating signal is; f(t) = 2cos3007tt + 4cos6007tt

Q.1: For the following signal: x(t) = 2e-ltl answer the following questions: 1 * :The signal is Energy Signal O Power Signal O 2 The energy of this signal is equal to: (please write a number without * (units 3 The normalized power of this signal is equal to: (please write a number (without units

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Please answer the questions given in image

how do you know this is a hartley configuration?

Perform an 8-point DFT on a continuous input signal containing components at 1 kHz and 2 kHz, expressed as: Xn (t) = sin(2000nt) + 0.50sin (4000nt + 0.50) Xa(t)=sin(2000IIt)+0.50sin(4000+0.511) Created by SEASOFT LTD.

Using the discrete time signal x [n] given in the figure below, calculate the expressions of the frequency a, b and c. x[n] 20 -3 -2 -1 0 1 2 3 4 5 6 8 a) S" X(ew) eizwdw b) |X(ew)l° dw c) X(ejm/?)

Plz solve  within 30 minutes  will definitely voteup plz ?

(Electronics engineering)- Communication system Answer the a and b question please

1) y(t) = 3e-2tu(t)The function above defines the model of a signal from the braking activities of a vehicle.a)sketch the signal using the information above.b)Determine the power & energy of the signal. 2) A sensor is used to capture voltage signal y(t) from a volcanic eruption & passed through an active highpass filter system for processing.a)Make a circuit diagram sketch for the process.b) Derive an expression for the transfer function of the system. c)Cut-off frequency = 2.5kHz & Input voltage = 20mVUse the above data to determine the values of the circuit components needed to produce an output of five volts. d) Suppose a two volts input voltage is applied to the filter system,  In terms of unit step function, i) what is the expression for this input? ii)Determine the output z(t) of the system. Assumption: All the circuit components in the transfer function equation have unity values.

please explain this

Q1/ A) Find the sampling frequency for the following signals: 1) S1 = 20 cos(1500nt) * cos (4000nt) 500nt. 2) S2 = |sir = sin nt [sin4000nt 3) S3 * 5 cos(1200nt) %3D B) The following waveform is the RB (return to bios) representation of the serial digital data, find the digital data code and draw the NRZ (non-return to zero) and RZ (return to zero) waveforms. C) The waveform below is the PAM for the analog signal, draw the analog signal, PWM and the PPM for this signal.

Explain the operation of frequency demodulation by using the PLL method.

The diagram of the circuit shown below is shown on the side. In the circuit, the fax is 10 times the cutoff frequency. Accordingly, the approximate value of the Cf capacitor is given correctly in which option.

An Armstrong modulator is used to generate FM which is suitable for FM broadcasting.You are given input of narrowband FM signal with carrier frequency fc1 = 27 MHz anda frequency deviation Δf1= 17 kHz. Assume that the frequency multiplier with n = 3 andlocal oscillator frequency of 80 MHz. Calculate the output of the carrier frequency andfrequency deviation if additive frequency is selected by mixer. Explain your obtainedanswer.

An AM transmitter puts a carrier of 6 A into an antenna whose resistance is 52 V. The transmitter is modulated by 60 percent. What is the total output power? ( Our lesson is AMPLITUDE MODULATION FUNDAMENTALS)