a) Discuss the different channel Allocation techniques in cellular system? Explain the scenario for fix and dynamic channel allocation considering the advantage and disadvantage.
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Q: b) Draw a block diagram of a typical digital communications system (both transmit and receive paths)…
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A: In this question we will write about Modem..
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Q: Explain the block diagram of super heterodyne of SSB receiver?
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Q: Design an 8-to-1-line multiplexer using a 3-to-8 line decoder and external gates.
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A: The solution is provided in the following section.
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A: Communication System : It is a system in which exchange the information between two node or points.…
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A: Super heterodyne receiver is also known as beat receiver, this receiver consist a oscillator which…
Q: Done + Estimate the percentage change of power for a DSB-SC AM system when the value of the…
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Q: What is the chip rate of W-CDMA?
A: The correct option is selected in the following section.
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- Consider an n-channel MOSFET. Sketch a cross section through the source, gate and drain regions (a)if the source, drain and gate are all grounded, sketch the depletion regions on both sides of the metallurgical junctions.For an n channel depletion type MOSFET, explain (what happens) with necessary diagram andcharacteristics curves: When VGS is varied with VDS = Some positive value.(b) In a junction of road instaled with traffic light, the sensor circuit with capabilties to detect a vehicle is planned to be buikl. By using the a.c bridge, discuss types of ac bridge that can be used for that purpose. Explain the concept using bock diagram of how the circut is connected and used with microprocessor.
- c) Draw a block diagram of a typical digital communications system including both transmit and receive paths and describe the nature of the signals generated by each of the blocks. Briefly describe what happens within the Modulator element and explain what is meant by the term 'up-conversion'.Question 5: a) In the context of WCDMA, answer the following questions: What is the chip rate of WCDMA? i. ii. What is the duration for WCDMA frame? iii. For the figure shown below, what is the spreading factor? Symbol iv. V. vi. vii. Data Spreading code Spread signal Datax code Spreading What is the corresponding processing gain? For the figure shown below, what is the multiplexing mode used? Uplink Downlink Frequency Time WCDMA has a frequency reuse of 1 between different cells. What does that mean? If fast fading occurs when the path difference between two received signals is half wavelength. Calculate the path difference at a frequency equals to 2 GHz.14. Short-circuit failure mode is associated with microcircuits, transistors, resistors and capacitors. True False
- Consider a three-phase DC/AC inverter with a DC bus voltage rate at600 V. Assume the DC bus voltage can drop during a discharge cycleto 350 V DC. Determine the AC bus voltage range and for a modulationindex of 0.9Write the pin names of the Mosfet, whose symbol is given below, in the spaces provided. Q....a) The Channel is a key component to consider in all communications systems. Give two examples of a channel commonly used in communications systems, and for each, the key properties that can impact transmission. Compare twisted-pair and fibre-optic wired channels. Explain how the use of differential signals can be used to improve the signal to noise ratio in a twisted pair channel. i) ii)
- 1. Transconductance gm is an important indicator of the current control capability of MOSFET. In the following, select all the effective methods to increase gm and explain the reason. (a) Shorten the channel length L. (b) Increase the carrier mobility of the inversion layer. (c) Increase the width W of the channel. (d) Thin the gate insulating film. (e) Increase the dielectric constant of the gate insulating film. windows Go to Settings to actiExplain block schematic of TDM?Explain with the aid of equations the following: i. How to improve the noiseless channel capacity? ii. How to improve the SNqR in the PCM system?