COMNET Assignment (1)

2. What are the differences between MATLAB functions (i) round and floor? (ii) mod and rem (iii) mean and median

In this part of the presentation can you give me a narrow explanation of these:

True or False The broader the bandwidth and the steeper the skirts.  In tuned radio frequency receivers the selectivity remains constant with varying frequencies.

Course: Data Communication & Network

Construct a signal flow graph from the following equations. Obtain overall TF using Mason's gain formula. Where x_{1} is i/p variable & x_{5} is a/p variable. x_{2} = a_{12}*x_{1} + a_{32}*x_{3} + a_{42}*x_{4} + a_{52}*x_{5} x_{5} = a_{35}*x_{3} + a_{45}*x_{4} x_{4} = a_{34}*x_{3} + a_{44}*x_{4} x_{3} = a_{23}*x_{2}

The figure shows multiple modulation schemes for the signal that is given by the dashed line sinusoidal function, the X-axis is the time axis is seconds and the Y-axis is the amplitude. Answer the following: What is the quantization noise in a modulator that uses a 4-bits register for the analog to digital conversion of the given sinusoidal signal? Please give deatiled solution for good understanding

Solve it fast fast plz and solve all questions plz

In a Common Base (CB) configuration, the output impedance is almost equal to _____? a.re b.ro c.Rc d.Rb

7. Specify the applications of BFSK?

Please help with the solution.

The carrier frequency is 500 Hz, and the modulating signal is a single- tone sinusoidal signal. The x-axis is in time while the y-axis is the amplitude of the AM signal. Determine the power of the unmodulated carrier in W. Assume the load resistance to be 1-ohm. 4 3 1 -1 2 -3 -4 -5 0.005 0.01 0.015 0.02 0.025 0.03 0.035 0.04 0.045 0.05 Time (s)

Attenuation, distortion, and noise contribute to transmission impairment. What is the solution, or how can these causes be improved?

Answer the following below. Choices are already included.    ASAP. Thank you!

Figure Q5 shows the cross-section of the typical layout of two tracks (A and B) on a printed circuit board with a ground plane C. The tracks are terminated as shown in the figure, with track A carrying digital signals. You can assume that the lines are electrically short. Q5 Draw the equivalent circuit that models the crosstalk and write down a relation between the voltage applied to track A and the voltage coupled on to track B at low frequencies, VNE- (a) (b) If the total mutual inductance between the two tracks L =9 nH, and the total mutual capacitance between the two tracks is C =2 pF, calculate: (i) the amplitude of the near-end pulse VNE- the amplitude of the near-end pulse VNE if the driven line is terminated in a short circuit instead. Comment on the crosstalk. (ii) В C 50 Q 50 Ω V(t) A B 50 ΩV VE 3 50 2 Vat)* 5 V 50 ns 50 ns 1 μs Figure Q5

1. Consider a Transmission System comprising a single electrical cable with a bandwidth of 30MHz.: (i) Explain the concept of transmission system bandwidth. In your answer refer to the use of a simple sinusoidal waveform as the transmission signal identifying the maximum frequency of the waveform. (ii) Having identified the maximum frequency of the simple sinusoidal waveform in (i) above, explain how this transmission system bandwidth limitation affects data rate. In your answer identify the maximum data rate achieveable with this signal assuming no other signal parameters are changed. (iii) If digital transmission signals are used instead, state whether this transmission system bandwidth limitation can be shared to facilitate simultaneous communications between multiple stations. Justify your answer with reference to transmission signal bandwidth.

b) The power delay profile of a typical urban mobile radio channel is given in Table 1. Answer the following questions. Please show all working. Relative delay Average relative power (dB) -1.5 -4.43 -5.85 -17.79 -23.00 -35.61 Table 1: Power delay profile for an urban cellular radio channel. (ms) 0 0.5 2.6 4.7 iii) Calculate the mean delay. 4.8 9.4 i) Define the terms: excess delay and total excess delay. ii) Compute the average relative power in Watts.

Solve all Q2: Fill in the blanks for the following 1- The main steps of communication system are 2- The Armstrong's method convert the 3- The main step of FM system is............ to.. ...........and Q3: a) Compare in details with aid of figures and equations between the Frequency Modulation (FM) and and Phase Modulation (PM) systems.

36. Phase modulation is also a type of angle modulation.Group of answer choices True False 37. In FM, the amplitude and frequency of the carrier is changed in accordance with the modulating signal.Group of answer choices True False 38. Phase modulators produce maximum frequency deviation at the time that the modulating signal transitions from negative to positive values or vice versa.Group of answer choices True False 40. In PM, maximum amount of leading or lagging phase shift happens at the peak values of the modulating signal.Group of answer choices True False

Q2:If the carrier frequency 500hz and reference voltage (12) V with Ac-3Ar and modulation frequency Mf= 2. find output voltage and frequency?

Solve: In a frequency modulating system, the frequency deviation constant k = 1 kHz/V. A sinusoidal modulating signal of amplitude is 15 V and a modulated frequency 3 kHz is applied. Calculate the peak frequency deviation in ____kHz and modulation index____

I need the answer as soon as possible

Digital Subscriber Lines can not be implemented with loading coils for the reason that a. loading coils are heavy and tend to sag the line b. loading coils are not compatible with DSL repeaters c. loading coils are only good for short distances d. loading coils attenuates signals beyond the voiceband 2. Under the 1st generation of analog mobile phone systems, what is the frequency used for advance mobile phones?