Cognitive Techniques MCQs

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

Cognitive Techniques MCQs | Page 2 of 7

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Q11.
Which among the following is an objective not dependent on bandwidth?

a.

Bit error rate

b.

Interference power

c.

Throughput

d.

Power

Discuss
Answer: (d).Power Explanation:Bandwidth measures the capacity of spectrum used by the radio. It influences a number of objects such as bit error rate, interference power, throughput, and spectral efficiency. Modulation type, symbol rate, and pulse shape filter are control monitors.
Q12.
____ is used to reduce inter-symbol interference.

a.

Root raised cosine filter

b.

Sinc filter

c.

Root raised sinc filter

d.

Cosine filter

Discuss
Answer: (a).Root raised cosine filter Explanation:The raised cosine filter is an implementation of Nyquist low pass filter. It is used for pulse shaping and to minimise inter-symbol interference. It derives its name from the frequency spectrum which resembles a cosine function.
Q13.
____ filter is required to form ____ filter.

a.

Two raised cosine filter, one sinc filter

b.

Two raised sinc filter, one raised cosine filter

c.

Two root raised cosine filter, one raised cosine filter

d.

Two raised cosine filter, one root raised cosine filter

Discuss
Answer: (c).Two root raised cosine filter, one raised cosine filter Explanation:Two root raised cosine filter is required to form one raised cosine filter. It may be used to reduce inter-symbol interference. It involves installing one root raised cosine filter at the transmitter and the other filter at the receiver.
Q14.
Spectral efficiency may be expressed in terms of ____

a.

Hertz

b.

bits per second

c.

Hertz per bit per second

d.

bits per Hertz per second.

Discuss
Answer: (c).Hertz per bit per second Explanation:Spectral efficiency describes the amount of information transferred in a channel. It may be used to determine quality of service. Spectral efficiency may be expressed in terms of Hertz per bit per second.
Q15.
The minimisation of bandwidth causes ____

a.

low symbol rate

b.

high symbol rate

c.

high power

d.

low power

Discuss
Answer: (a).low symbol rate Explanation:The minimisation of bandwidth causes low symbol rate and utilization of algorithm such GMSK. The maximisation of bandwidth causes high symbol rate and higher modulation method.
Q16.
Which among the following is an expression for spectral efficiency?

a.

ฮท=\(\frac{R_sk}{B}\). where Rโ‚› is the symbol rate, B is the bandwidth, K is the number of bits per symbol

b.

ฮท=Rโ‚›B where Rs is the symbol rate, B is the bandwidth, K is the number of bits per symbol

c.

ฮท=\(\frac{Bk}{R_s}\)where Rโ‚› is the symbol rate, B is the bandwidth, K is the number of bits per symbol

d.

ฮท=BK where B is the bandwidth

Discuss
Answer: (a).ฮท=\(\frac{R_sk}{B}\). where Rโ‚› is the symbol rate, B is the bandwidth, K is the number of bits per symbol Explanation:Spectral efficiency is given by the product of number of bits per symbol and symbol rate divided by bandwidth. It helps in achieving balance between symbol rate and modulation type.
Q17.
The modification of a signal due to extraneous power exhibited by a signal from a nearby channel is called ____

a.

co-channel interference

b.

adjacent channel interference

c.

inter-symbol interference

d.

inter-carrier interference

Discuss
Answer: (b).adjacent channel interference Explanation:The modification of a signal due to extraneous power exhibited by a signal from a nearby channel is called adjacent channel interference. It may be due to inadequate filtering, improper tuning or poor frequency control. It may be classified as adjacent channel leakage ratio and adjacent channel selectivity.
Q18.
The aim of interference objective is ____

a.

to determine compatibility of waveform and frequency

b.

to determine compatibility of waveform and radio environment

c.

to compare channels

d.

to compare signals

Discuss
Answer: (d).to compare signals Explanation:The interference objective depends on bandwidth. It is measured at various frequencies and is defined by interference map. The interference map is used to determine the overlap present between signals trying to operate on the same spectrum.
Q19.
Signal to interference plus noise ratio gives ____

a.

lower bound on channel capacity

b.

upper bound on channel capacity

c.

upper bound on receiver capacity

d.

lower bound on channel capacity

Discuss
Answer: (b).upper bound on channel capacity Explanation:Signal to interference plus noise ratio gives upper bound on channel capacity in wireless communication system. It takes into account factors such as noise, interference, path loss, and bandwidth. It is a parameter that defines the quality of wireless connection.
Q20.
Signal to interference plus noise ratio is defined as ____

a.

ratio of noise power to interference power

b.

ratio of signal power to sum of noise and interference power

c.

ratio of sum of noise and interference power to signal power

d.

ratio of interference to noise power

Discuss
Answer: (b).ratio of signal power to sum of noise and interference power Explanation:Signal to interference plus noise ratio is defined as ratio of signal power to sum of noise and interference power. If the noise power were to be zero, the expression reduces to signal to interference ratio. If the interference were to be zero, the expression reduces to signal to noise ratio.
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