Next Generation Wireless Network MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Next Generation Wireless Network, 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 Next Generation Wireless Network 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 Next Generation Wireless Network mcq questions that explore various aspects of Next Generation Wireless Network problems. Each MCQ is crafted to challenge your understanding of Next Generation Wireless Network 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 Next Generation Wireless Network 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 Next Generation Wireless Network. 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 Next Generation Wireless Network knowledge to the test? Let's get started with our carefully curated MCQs!

Next Generation Wireless Network MCQs | Page 20 of 33

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Q191.
Which among the following is not a prerequisite for cooperative sensing?

a.

Non-corrupt neighbouring radios

b.

Knowledge of spectrum environment

c.

Knowledge of limits of transmission parameters

d.

Central entity

Discuss
Answer: (d).Central entity Explanation:Cooperative spectrum sharing involves sharing spectrum usage and noise information to other nodes of the spectrum. This mode considers the operation of other spectrum users thus raising the overall spectrum efficiency of the network. It requires non-corrupt neighbouring radios, knowledge of spectrum environment, understanding of limits imposed on transmission parameters, and transparent sharing of spectrum information by transmitters.
Q192.
Which among the following institution introduced interference temperature as a metric for interference?

a.

Federal Communication Commission

b.

American National Standards Institute

c.

International Standards Organization

d.

British Standards Institute

Discuss
Answer: (a).Federal Communication Commission Explanation:Federal Communication Commission introduced interference temperature as a metric for modeling interference at the primary user produced by the secondary user. It is a measure of RF power generated by undesired transmitters and noise sources that are present in the receiver system per unit of bandwidth.
Q193.
Diffracted propagation undergoes attenuation at the rate of the third power of distance.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True Explanation:Cognitive radio shifts communication from direct propagation to diffracted propagation. Diffracted propagation undergoes attenuation at the rate of the fourth power of distance. It hinders the ability of the radio to sense, calculate interference, and evaluate the outcome of communication.
Q194.
Which among the following is false about multiple input, multiple output scheme?

a.

MIMO generates multiple orthogonalized channel

b.

Channel awareness is used to design link

c.

Coverts multiple path into multiple channels

d.

Eliminates multiple path

Discuss
Answer: (d).Eliminates multiple path Explanation:Multiple input, multiple output is a technique that introduces multiple antennas at the transmitter and the receiver generating several paths for transmission. MIMO introduces channel awareness on an architectural level and is employed in the generation of links and topology. It utilizes multipath and converts multiple paths into multiple channels.
Q195.
Which among the following is an advantage of using Fast Fourier Transform (FFT) for spectrum sensing?

a.

Analysis of computation complexity in the FFT window

b.

Analysis of phase in the FFT window

c.

Analysis of period enclosed in the FFT window

d.

Analysis of frequencies enclosed in the FFT window

Discuss
Answer: (d).Analysis of frequencies enclosed in the FFT window Explanation:Fast Fourier transform is used for performing spectrum sensing by using a wideband analog to digital converter and extensive digital signal processor. This method proves advantageous as it enables the analysis of frequencies enclosed in the FFT window.
Q196.
Which among the following is not a limitation of employing FFT?

a.

Wideband ADC is required

b.

Restriction on bandwidth

c.

Increased energy demand

d.

High delay

Discuss
Answer: (d).High delay Explanation:FFT operation demands wideband ADC and extensive digital signal processing. The ADC imposes restrictions on the instantaneous bandwidth. The energy usage is increased due to the high amount of digital signal processing.
Q197.
Which among the following parameters do not exhibit better performance in the spectrum analyzer when compared to the FFT technique?

a.

Complexity

b.

Bandwidth

c.

Short signal detection

d.

Power

Discuss
Answer: (c).Short signal detection Explanation:Spectrum analyzers are employed for spectrum sensing by tuning to a band with the scan frequency adjusted to dwell at a frequency bin for a desired period. The spectrum analyzer exhibits reduced complexity and power requirements when receiver components are shared. It also scans over large ranges of signals.
Q198.
Which among the following is accomplished by sampling sub-Nyquist in wideband FFT spectrum sensing?

a.

Reduction of complexity

b.

Improved signal detection

c.

Reduced power consumption

d.

Shorter time delay

Discuss
Answer: (d).Shorter time delay Explanation:Time delay and interleaving time can be controlled by sampling sub-Nyquist and by using appropriate filters in wideband FFT spectrum sensing. The short delay simplifies compatibility with MAC layer timing.
Q199.
Which among the following layers have a similar impact due to interference caused by primary user transmission?

a.

Physical layer and MAC layer

b.

MAC layer and network layer

c.

Network layer and Transport layer

d.

Transport layer and Physical layer

Discuss
Answer: (c).Network layer and Transport layer Explanation:The effect of primary user transmission on the MAC layer and network layer is complete and irreversible blockage of a packet. It can be mitigated by retransmitting acknowledgments in the MAC layer. It can be mitigated in the network layer by selecting protocol with effective packet restoration mechanisms.
Q200.
Which among the following is the impact of primary user interference in the physical layer?

a.

High bit error rate

b.

High delay

c.

High collision

d.

High energy demand

Discuss
Answer: (a).High bit error rate Explanation:The effect of primary user interference in the physical layer is a high bit error rate. It can be mitigated by adjusting the coding dynamically. It also can be resolved by allowing higher layers to tackle interference for a period of time.
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