Technology Tradeoffs in Software Defined Radio MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Technology Tradeoffs in Software Defined Radio, a fundamental topic in the field of Cognitive Radio. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Technology Tradeoffs in Software Defined Radio MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Technology Tradeoffs in Software Defined Radio mcq questions that explore various aspects of Technology Tradeoffs in Software Defined Radio problems. Each MCQ is crafted to challenge your understanding of Technology Tradeoffs in Software Defined Radio principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Cognitive Radio tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Technology Tradeoffs in Software Defined Radio MCQs are your pathway to success in mastering this essential Cognitive Radio topic.

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Technology Tradeoffs in Software Defined Radio MCQs | Page 5 of 17

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Q41.
Which of the following is a characteristic to be possessed by a roofing filter?

a.

Low insertion loss

b.

Fixed bandwidth

c.

High insertion loss and fixed bandwidth

d.

High insertion loss

Discuss
Answer: (a).Low insertion loss Explanation:A roofing filter must have low insertion loss, programmable bandwidth and programmable center frequency for effective interference suppression.
Q42.
Active cancellation is the process of introducing transmitted signal in the _____ for subtraction from the input signal.

a.

transmitter

b.

low pass filter

c.

equalizer

d.

receiver

Discuss
Answer: (d).receiver Explanation:Active cancellation is the processing of introducing transmitted signal in the receiver for subtraction from the input signal. It is a part of interference suppression process.
Q43.
In active radar blanking, communication between RF stage and rest of the communication system is ___ while the control line is ____

a.

on, inactive

b.

off, inactive

c.

off, active

d.

on, absent

Discuss
Answer: (b).off, inactive Explanation:In active blanking, communication between RF stage and rest of the communication system is off while the control line is inactive. This is an example for active cancellation.
Q44.
The required active cancellation is equal to ____ between the maximum non distorting input signal and the radiation level at the antenna.

a.

half the difference

b.

the difference

c.

twice the difference

d.

the correlation

Discuss
Answer: (b).the difference Explanation:The amount of active cancellation to be provided is equal to the difference between the maximum non distorting input signal and the radiation level at the antenna. It is also given by the ratio of peak energy at the output of the receiver antenna terminal to the maximum linear energy.
Q45.
The number and characteristics of roofing filter are determined by modulation of the subscriber signal.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True Explanation:The modulation of the subscriber signal and bandwidth of the passband interference determine number and characteristics of roofing filter. The use of roofing filter establishes a noise floor and prevents dropped calls.
Q46.
RF integrated circuits generally comprise of _____

a.

resonators and resistors

b.

resistors

c.

diodes

d.

resonators and capacitors

Discuss
Answer: (d).resonators and capacitors Explanation:RF integrated circuits consist of off-chip resonators, inductors, and capacitors. Each device increases the production cost which is linear function of number of components.
Q47.
RF MEMS gives _______ alternative to electronic switching circuits.

a.

an electromechanical

b.

a mechanical

c.

an electro-dynamic

d.

an interconnected

Discuss
Answer: (a).an electromechanical Explanation:RF MEMS gives an electromechanical alternative to electronic switching circuit. RF MEMS can aid in the reduction of size, weight and power.
Q48.
Which of these is not a technique used to induce sharp resonance in resonators?

a.

Rigidity

b.

Bulk

c.

Acoustic

d.

Piezoelectric

Discuss
Answer: (a).Rigidity Explanation:Resonator achieves sharp resonance by using bulk, acoustic and piezoelectric effects. By adapting the mentioned effects, quality factor in the range of 10,000 can be achieved.
Q49.
In resonators with nanoscale I-beams, which factor does not affect the mechanical frequencies of I-beams?

a.

Size

b.

Density

c.

Stiffness

d.

Distance between beam and bottom of the cavity

Discuss
Answer: (b).Density Explanation:In resonators with nanoscale I-beams suspended over the cavity, the mechanical frequencies of I-beam are determined by size and stiffness of I-beam, and the distance between the beam and bottom of the cavity.
Q50.
The industry standard figure of merit for an RF switch is ______

a.

R0C1

b.

R1C0

c.

C0R1

d.

C1R0

Discuss
Answer: (b).R1C0 Explanation:The industry standard figure of merit for an RF switch is R1C0. It is given by the product of ON-resistance and OFF-capacitance. It is measured in femtoseconds.
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