Cognitive Radio Basics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Cognitive Radio Basics, 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 Cognitive Radio Basics 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 Cognitive Radio Basics mcq questions that explore various aspects of Cognitive Radio Basics problems. Each MCQ is crafted to challenge your understanding of Cognitive Radio Basics 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 Cognitive Radio Basics MCQs are your pathway to success in mastering this essential Cognitive Radio topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Cognitive Radio Basics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Cognitive Radio Basics knowledge to the test? Let's get started with our carefully curated MCQs!

Cognitive Radio Basics MCQs | Page 8 of 11

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Q71.
Bands are allocated to radio access technology ____ in such a way that ____ is ____

a.

dynamically, capacity, minimized

b.

statically, interference, minimized

c.

dynamically, capacity, maximized

d.

statically, interference, maximized

Discuss
Answer: (c).dynamically, capacity, maximized Explanation:Bands can be allocated to radio access technology dynamically in such a way the capacity is maximized and interference is minimized. The network operator may employ different radio access technology in accordance to time, frequency, and location. It can be used to acquire or exchange spectrum user rights.
Q72.
Which among the following is not listed under cognitive capability?

a.

Knowledge on operational environment

b.

Adjustment of operational parameters

c.

Knowledge on geographical environment

d.

Establishment of policies

Discuss
Answer: (b).Adjustment of operational parameters Explanation:A cognitive radio has cognition, reconfiguration, and learning capability. The automatic and dynamic adjustment of operation parameters based on obtained knowledge to achieve set objective falls under reconfiguration capability.
Q73.
Adaptive radio can experiment new settings.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False Explanation:An adaptive radio can monitor itself and modify parameters according to sensor input. However learning from results of operations and experimenting with new data and policies is possible only in a cognitive radio.
Q74.
Cognitive pilot channel is used ____

a.

to obtain knowledge

b.

for geo-location

c.

for database access

d.

for spectrum sensing

Discuss
Answer: (a).to obtain knowledge Explanation:Cognitive pilot channel, geo-location, database access, and spectrum sensing are means to gain knowledge. The automatic and dynamic adjustment of operation parameters is done based on obtained knowledge.
Q75.
Heterogeneous cognitive radio is a ____ centric approach.

a.

security

b.

RF band

c.

network

d.

environment

Discuss
Answer: (c).network Explanation:Heterogeneous cognitive radio has a network centric approach where one or more operators operate several radio access networks using the same or different radio access technologies. Frequency bands allocated to these radio access networks are fixed.
Q76.
In ____, radio access technologies use the same frequency band.

a.

network centric approach

b.

spectrum sharing

c.

spectrum sensing

d.

RF band centric approach

Discuss
Answer: (b).spectrum sharing Explanation:Spectrum sharing cognitive radio permits same or different radio access technologies to use same frequency band by using unoccupied sub-bands in an intelligent and coordinated way.
Q77.
Global Positioning System uses ____ to determine geo-location of receiver.

a.

time of arrival

b.

time difference of arrival

c.

time of arrival and angle of arrival

d.

time difference of arrival and angle of arrival

Discuss
Answer: (b).time difference of arrival Explanation:Global Positioning System is a satellite based radio navigation system. It offers a resolution of 100 m and requires unobstructed line of sight from satellites. It uses time difference of arrival to determine geo-location of receiver.
Q78.
GPS receivers include a signal that is ____ filtered when it reaches a radio from a satellite.

a.

Gaussian

b.

Blackman

c.

Kalman

d.

Sobel

Discuss
Answer: (c).Kalman Explanation:Kalman filter uses observed values and provides accurate estimates of unknown variables using joint probability distribution over the variables for each time frame. GPS receivers include a one pulse per second signal that is Kalman filtered.
Q79.
Kalman filter estimates ____

a.

time of arrival

b.

time difference of arrival

c.

propagation delay

d.

location

Discuss
Answer: (c).propagation delay Explanation:Kalman filter provides high resolution estimation of propagation delay from each satellite irrespective of their position. Kalman filter uses input from ground monitoring stations, space weather information, etc. The GPS receivers can estimate time with approximately 340 nanoseconds of jitter.
Q80.
GPS requires at least ___ satellites in view of the receiver.

a.

three

b.

two

c.

five

d.

four

Discuss
Answer: (d).four Explanation:GPS receiver monitors several satellites to precisely compute the location and clock deviation. It requires at least four satellites to be present in its field of view. Three position coordinates and clock deviation from satellite time are the unknown entities to be computed.
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