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 1 of 17

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Q1.
The parameters of the antenna considered for RF access are ______

a.

RF band and bandwidth

b.

RF band and resonant frequency

c.

noise constraints and bandwidth

d.

directivity and RF band

Discuss
Answer: (a).RF band and bandwidth Explanation:The parameters of the antenna considered for RF access are RF band and bandwidth. Antenna architecture determines the number and bandwidth of RF channels. This imposes constraint on number and bandwidth of ADCs.
Q2.
How is bandwidth expressed in a Software Defined Radio?

a.

Ratio of highest RF to lowest RF

b.

Ratio of median RF to lowest RF

c.

Ratio of lowest RF to highest RF

d.

Ratio of lowest RF to median RF

Discuss
Answer: (c).Ratio of lowest RF to highest RF Explanation:Bandwidth can be expressed as a percentage of carrier frequency. An alternate method is to take the ratio of lowest RF to highest RF over which the parameters such as VSWR are operable.
Q3.
What type of antenna is the Yagi antenna?

a.

Surface-wave

b.

Resonant

c.

Traveling wave

d.

Aperture

Discuss
Answer: (a).Surface-wave Explanation:The Yagi antenna is a surface-wave antenna operating at 1 – 6 GHz range. It is used as radar feed and array. The setup of a Yagi antenna consists of a driven element, a reflector, and one or more directors.
Q4.
What is the operating range of a pyramidal horn antenna?

a.

1 – 6 GHz

b.

1 – 5 GHz

c.

300 MHz – 70 GHz

d.

100 MHz – 35 GHz

Discuss
Answer: (c).300 MHz – 70 GHz Explanation:The pyramidal horn antenna is an aperture type antenna operating in the range 300MHz – 70GHz. It is used in radar communication.
Q5.
The increase in the bandwidth of the antenna causes the thermal noise power to ______

a.

decrease linearly

b.

increase linearly

c.

increase exponentially

d.

decrease exponentially

Discuss
Answer: (b).increase linearly Explanation:Wider bandwidth results in increase of noise which reduces the value of SNR, affecting the performance negatively. Filtering of antenna channels according to subscriber signals can give better performance.
Q6.
Which method is used to estimate time-difference of arrival and angle of arrival?

a.

Optical interferometry

b.

Interferometric dynamic measurement

c.

Frequency scanning interferometry

d.

Phase interferometry

Discuss
Answer: (d).Phase interferometry Explanation:Time-difference of arrival and angle of arrival are determined by phase interferometry. These parameters play an important role in network-based emitter location techniques.
Q7.
Both TDOA and CDMA continuously compute ______

a.

time difference of arrival

b.

time of arrival

c.

angle of arrival

d.

time delay of arrival

Discuss
Answer: (b).time of arrival Explanation:Time Difference of Arrival (TDOA) and Code Division Multiple Access (CDMA) continuously compute time of arrival in order to recover the direct sequence and spread spectrum waveform.
Q8.
Antenna separation effectively controls _________

a.

directivity

b.

external noise

c.

self-generated interference

d.

external interference

Discuss
Answer: (c).self-generated interference Explanation:Antennas in same enclosure or when closely spaced often lead to interference. This can be mitigated by antenna separation. The benefit of separation can be estimated by link-based spreadsheet.
Q9.
Which of the following gives permissible levels of exposure to radiation in terms of whole body average SAR as per US FCC?

a.

0.02

b.

0.04

c.

0.06

d.

0.08

Discuss
Answer: (d).0.08 Explanation:The radiation from antenna might have a harmful impact on the human body. The US FCC imposes a limit of 0.08 for whole body average SAR and 1.6 for spatial peak SAR.
Q10.
Human body interaction causes distortions in antenna pattern and health risk in human beings.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True Explanation:Human body interaction causes distortions in antenna pattern and health risk in human beings. Handheld device generally tilt the wire antenna away from the user for minimal absorption and better radiation efficiency.
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