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 6 of 33

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Q51.
Which parameter can be used to compute the permissible power of xG users?

a.

Distance between the primary transmitter and xG user

b.

Amount of interference at the primary receiver

c.

Amount of interference at xG user

d.

Distance between the primary receiver and xG user

Discuss
Answer: (b).Amount of interference at the primary receiver Explanation:Channel capacity can be estimated by determining the permissible power of an xG user. The permissible power is computed by determining the amount of interference at the primary receiver. The amount of interference sometimes depends on the number of users in the spectrum.
Q52.
Which among the following statements is false about the outcome of increasing transmission power?

a.

Transmission range at higher frequencies is maintained

b.

Path loss is increased

c.

Interference is increased

d.

Transmission range at lower frequencies is maintained

Discuss
Answer: (b).Path loss is increased Explanation:Path loss is proportional to the operating frequency. Hence, transmission range gradually reduces with an increase in frequency when the transmission power is not modified. If transmission power is increased, the path loss is decreased with an increase in the amount of interference.
Q53.
Which among the following factors affect the error rate?

a.

Encoding techniques

b.

Modulation scheme

c.

Channel capacity

d.

Access techniques

Discuss
Answer: (b).Modulation scheme Explanation:Wireless link errors are parameters of importance in characterizing the spectrum band. The modulation scheme and the amount of interference in the spectrum band influence the error rate. Wrongful sensing decisions are also a contributing factor to the high error rate.
Q54.
What is the primary cause of the link-layer delay?

a.

Selection of appropriate protocol

b.

Selection of routing path

c.

Packet generation

d.

Frame generation

Discuss
Answer: (a).Selection of appropriate protocol Explanation:Each spectrum band is assigned a different protocol with respect to the interference level, path loss, and wireless link errors of the band. The link-layer packet transmission delay differs with different protocols.
Q55.
What is holding time?

a.

The duration required to identify a spectrum hole

b.

The duration available after the arrival of the primary user to vacate the spectrum band

c.

The duration over which the xG user can use the licensed spectrum band

d.

The duration over which the xG user can use the unlicensed spectrum band

Discuss
Answer: (c).The duration over which the xG user can use the licensed spectrum band Explanation:Holding time refers to the period over which the xG user can occupy the licensed spectrum band before the arrival of the primary user. High holding time ensures high quality. Statistical handoff patterns are used to construct xG networks with longer holding time.
Q56.
Which among the following is a challenge for spectrum management?

a.

Asynchronous sensing

b.

Multiple spectrum band operation

c.

Availability of non-contiguous spectrum bands

d.

Reconfiguration

Discuss
Answer: (d).Reconfiguration Explanation:Transmission parameters of a radio should be reconfigurable for effective operation in certain spectrum bands. For example, if the signal to noise cannot be modified, then the bit error rate can be altered to maintain the channel capacity by employing adaptive modulation techniques.
Q57.
Which among the following is the expression for channel capacity as per Shannon-Hartley theorem?
B is bandwidth, N is the average noise power, and S is the average received signal power.

a.

C=B+logโ‚‚(1+ \(\frac{N}{S})\)

b.

C=B+logโ‚‚(1+ \(\frac{S}{N})\)

c.

C=B logโ‚‚(1+ \(\frac{N}{S})\)

d.

C=B logโ‚‚(1+ \(\frac{S}{N})\)

Discuss
Answer: (d).C=B logโ‚‚(1+ \(\frac{S}{N})\) Explanation:Shannon Hartley theorem states the maximum rate of transmission over a channel of specified bandwidth containing noise. The calculated channel capacity creates an upper bound for maximum error-free information transmission.
C=B logโ‚‚(1+ \(\frac{S}{N})\)
Here B is bandwidth, N is the average noise power, and S is the average received signal power.
Q58.
Which among the following an expression for spectrum capacity in OFDM based xG networks?
ฮฑ refers to a set of unused spectrum units, G(f) is the channel power gain at frequency f, Sโ‚€ is the signal power per unit frequency and Nโ‚€ is the noise power per unit frequency.

a.

C=โˆซฮฑ\(\frac{1}{2}\)logโ‚‚(1+\(\frac{G(f)S_0}{N_0})\)

b.

C=โˆซฮฑ\(\frac{1}{2}\)logโ‚‚(1+\(\frac{S_0}{N_0})\)

c.

C=โˆซฮฑB logโ‚‚(1+\(\frac{G(f)S_0}{N_0})\)

d.

C=โˆซฮฑB logโ‚‚(1+\(\frac{G(f)N_0}{S_0})\)

Discuss
Answer: (a).C=โˆซฮฑ\(\frac{1}{2}\)logโ‚‚(1+\(\frac{G(f)S_0}{N_0})\) Explanation:Orthogonal Frequency Division Multiplexing is a digital modulation scheme. The data stream is divided into several closely spaced subcarrier signals at different frequencies. The spectrum capacity of OFDM xG networks is given by the expression,
C=โˆซฮฑ\(\frac{1}{2}\)logโ‚‚(1+\(\frac{G(f)S_0}{N_0})\)
Here ฮฑ refers to a set of unused spectrum units, G(f) is the channel power gain at frequency f, Sโ‚€ is the signal power per unit frequency, and Nโ‚€ is the noise power per unit frequency.
Q59.
Which among the following is not selected in accordance with the user requirement?

a.

Interference

b.

Data rate

c.

Tolerable error rate

d.

Transmission mode

Discuss
Answer: (a).Interference Explanation:Following the characterization of the spectrum, the spectrum band for transmission is selected by weighing the spectrum characteristics and the quality of service requirements. Spectrum manager fixes the data rate, tolerable error rate, transmission mode, the bandwidth of transmission, and the delay bound according to the user requirements.
Q60.
Which among the following is not a challenge for spectrum management?

a.

Interference avoidance

b.

Quality of service awareness

c.

Seamless communication

d.

Interference temperature measurement

Discuss
Answer: (d).Interference temperature measurement Explanation:xG users should not cause interference to primary user communication. The handoff to a different spectrum band upon arrival of the primary user should be seamless. The dynamic spectrum environment and quality of service requirements should be analyzed and managed for effective communication.
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