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 4 of 33

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Q31.
What is the advantage of using matched filter detection?

a.

Rapid increase in processing gain

b.

Simultaneous detection

c.

High accuracy

d.

Low power consumption

Discuss
Answer: (a).Rapid increase in processing gain Explanation:Matched filter detection achieves high processing gain rapidly due to coherency. However when accurate information is not available about the signal transmitted by the primary user, then the matched filter detection method exhibits poor performance.
Q32.
Which among the following is not an operational unit in energy detection?

a.

Integrator

b.

Squaring unit

c.

Correlator

d.

Threshold device

Discuss
Answer: (c).Correlator Explanation:Energy detection consists of three operational units namely squaring device, integrator, and threshold device. The received signal energy is measured by squaring and integrating the received signal over an interval T. The output of the integrator is then evaluated by the threshold device to determine the existence of the primary user in the licensed spectrum.
Q33.
Which among the following are factors of significance in the energy detection technique?

a.

Probability of detection and probability of exception

b.

Probability of detection and probability of false alarm

c.

Probability of detection and probability of useful information

d.

Probability of false alarm and probability of useful information

Discuss
Answer: (b).Probability of detection and probability of false alarm Explanation:Probability of detection and probability of false alarm are factors of significance in energy detection technique. They depend on the signal to noise ratio, time-bandwidth product, complete and incomplete gamma functions, and generalized Marcum Q-function.
Q34.
Sensing control is implemented in the physical layer of the OSI model.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (b).False Explanation:Sensing control is essential to adapt sensing operation in accordance with the dynamic radio environment. It operates in the physical and data-link layer of the OSI model. It coordinates the sensing operations among xG users in a distributed manner. It helps to avoid false alarms in cooperative sensing.
Q35.
Which among the following is achieved by coupling a modulated signal with a sine wave carrier?

a.

Causality

b.

Periodicity

c.

Linearity

d.

Stability

Discuss
Answer: (b).Periodicity Explanation:Modulated signals are coupled with sine wave carriers, hopping sequences, or cyclic prefixes to attain periodicity. The signals are regarded as cyclostationary due to periodic mean and autocorrelation.
Q36.
Which among the following is not an advantage of using cyclostationary feature detection?

a.

Better performance than energy detection

b.

Does not require prior knowledge of the signal transmitted by the primary user

c.

Robust noise performance

d.

Rapid attainment of high processing gain

Discuss
Answer: (d).Rapid attainment of high processing gain Explanation:The primary advantage of using cyclostationary feature detection is its ability to differentiate noise signals from modulated signals. This is due to incorporated redundancy in modulated signals. However cyclostationary feature detection is computationally intensive and demands long observation time.
Q37.
What is the purpose of out-of-band sensing?

a.

Fast switching

b.

Fast routing

c.

Fast discovery

d.

Fast handoff

Discuss
Answer: (c).Fast discovery Explanation:Out-of-band sensing computes the time duration required by a cognitive radio user to detect a completely available spectrum band for transmission. Sensing order and stopping rule are factors that overlook out-of-band sensing.
Q38.
Which among the following is a factor of concern for in-band sensing?

a.

Identification of stop period for the search process

b.

Identification of the start period for the search process

c.

Selection of spectrum for evaluation

d.

Selection of duration for transmission

Discuss
Answer: (d).Selection of duration for transmission Explanation:In-band sensing is mainly concerned with interference avoidance. Sensing time and transmission time are the major factors computed by in-band sensing. The duration and the frequency at which sensing should be carried out to achieve satisfying sensing accuracy is determined by in-band sensing.
Q39.
Which among the following are problems of transmitter detection?

a.

Secondary user uncertainty and xG base station uncertainty

b.

xG base station uncertainty and primary base station uncertainty

c.

Receiver uncertainty and shadowing uncertainty

d.

Transmitter uncertainty and receiver uncertainty

Discuss
Answer: (d).Transmitter uncertainty and receiver uncertainty Explanation:When the xG user communication range does not include the transmitter, interference is unavoidable as receiver information is unavailable. This is known as receiver uncertainty. In certain situations, the xG user has a good line of sight with the receiver but is unaware, this is known as shadowing uncertainty.
Q40.
What is the terminology used when xG base-station is involved in gathering sensing information?

a.

Cumulative

b.

Centralized

c.

Distributed

d.

Aggregated

Discuss
Answer: (b).Centralized Explanation:Cooperation detection can be carried out with a centralized structure or with a distributed structure. Centralized cooperation detection involves the collection of sensing information by the xG base station to determine spectrum holes. Distributed cooperation detection detects spectrum holes by using information exchanged by xG users.
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