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 4 of 17

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Q31.
Which of the following is not present in the conversion stages of super heterodyne receiver?

a.

Local oscillator

b.

Additional filter

c.

Step attenuator

d.

Amplifier

Discuss
Answer: (c).Step attenuator Explanation:Each conversion stage of super heterodyne receiver has one LO, additional filters and amplifiers. Step attenuator is present after the pre-selector filters. It confines the total power at the input of first conversion stage within its linear range.
Q32.
Which of the following is used in base station applications?

a.

Super heterodyne receiver

b.

Direct conversion receiver

c.

Digital-RF receiver

d.

Homodyne receiver

Discuss
Answer: (a).Super heterodyne receiver Explanation:Super heterodyne receiver is used in base station applications. Direct conversion receiver is used in handsets. Digital-RF receiver performs demodulation at RF.
Q33.
Direct conversion receiver is a heterodyne receiver.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False Explanation:The direct conversion receiver is a homodyne receiver which may use non-zero baseband center frequency.
Q34.
Which of the following is a challenge for direct conversion receiver?

a.

GaAs circuitry

b.

CMOS circuitry

c.

LO leakage and DC bias

d.

Difference between CMOS and GaAs circuitry

Discuss
Answer: (c).LO leakage and DC bias Explanation:LO leakage and DC bias are a challenge for wide band digital signal processing using direct conversion receiver.
Q35.
In which technique RF is amplified until it is hard-limited into a square wave?

a.

Super heterodyne receiver

b.

One-bit direct conversion digital receiver

c.

Two-bit direct conversion digital receiver

d.

Phase crossing counter receiver

Discuss
Answer: (b).One-bit direct conversion digital receiver Explanation:One-bit direct conversion digital receiver amplifies RF until it is hard limited into a square wave. An advantage of this architecture is that the channel states are stored in lookup tables.
Q36.
When ____ of N zero crossings count becomes small, a signal is considered to be present.

a.

mean

b.

correlation

c.

standard deviation

d.

variance

Discuss
Answer: (d).variance Explanation:When zero crossings are simply counted, a small variance of N zero crossings indicate a signal to be present. A disadvantage of this technique is the presence of high speed logic and lack of equalization.
Q37.
Which of the following is not used to control interference at RF?

a.

Programmable digital notch filters

b.

Active cancellation

c.

Frequency separation

d.

Antenna separation

Discuss
Answer: (a).Programmable digital notch filters Explanation:Physical antenna separation, frequency separation, programmable analog notch filters and active cancellation are the steps used to control interference at RF.
Q38.
The ______ of out-of-band signal with bandpass characteristic of the receiver gives the interference in the receiver owing to out-of-band energy at the transmitter.

a.

correlation

b.

correlation and convolution

c.

integral

d.

convolution

Discuss
Answer: (d).convolution Explanation:The convolution of out-of-band signal with bandpass characteristic of the receiver gives the interference in the receiver owing to out-of-band energy at the transmitter.This type of interference can affect the roll-offs. Frequency separation is employed to suppress this type of interference.
Q39.
____ separates uplink and downlink.

a.

Frequency Division Duplexing

b.

Time Division Duplexing

c.

Frequency Division Multiplexing

d.

Time Division Multiplexing

Discuss
Answer: (a).Frequency Division Duplexing Explanation:Frequency Division Duplexing separates uplink and downlink to minimize interference. SDR operating on TDD can create dynamic FDD nets by a protocol that dynamically defines uplink, downlink and frequency separation.
Q40.
A _____filter establishes maximum and minimum possible level for processing.

a.

adaptive

b.

flooring

c.

roofing

d.

content

Discuss
Answer: (c).roofing Explanation:A roofing filter establishes the maximum (roof) and minimum (floor) linearly possible level for processing. It is also referred to as co-site filter.
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