Software Defined Radio Architecture MCQs

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

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Software Defined Radio Architecture MCQs | Page 5 of 13

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Q41.
Which among the following is not a part of RF front-end section in receive mode?

a.

Antenna-matching unit

b.

Low-noise amplifier

c.

Power amplifier

d.

ADC

Discuss
Answer: (c).Power amplifier Explanation:The RF front-end section in receive mode consists of antenna-matching unit, low noise amplifiers, filters, local oscillators, and analog to digital converters. The power amplifier is a part of RF front-end section in transmit mode.
Q42.
The circuits of transmit mode in RF front end _____ RF signal.

a.

suppresses

b.

synthesizes

c.

boosts

d.

modulates

Discuss
Answer: (b).synthesizes Explanation:The circuits of transmit mode in RF front end synthesizes RF signal. The generated signal must not introduce disturbance at any other frequencies and affect other users of the spectrum.
Q43.
____ time aligns a signal and fits it into the information bandwidth.

a.

AGC

b.

Channel equalizer

c.

Modem

d.

Tracking loop

Discuss
Answer: (c).Modem Explanation:The modem generates the signal to be transmitted and processes the signal received in case of a full duplex radio. It also time aligns, de-spreads a signal and fits it into the information bandwidth.
Q44.
The number of times an electronic signal changes its state is measured by ____

a.

word rate

b.

signal rate

c.

bit rate

d.

baud rate

Discuss
Answer: (d).baud rate Explanation:Baud rate gives the rate at which information is sent in a communication channel. The number of times an electronic signal changes state is measured by baud rate.
Q45.
The modem may include ____ to correct channel multipath artifacts.

a.

equalizer

b.

frequency offset

c.

AGC

d.

interference suppressor

Discuss
Answer: (a).equalizer Explanation:The modem may include equalizer to correct channel multipath artifacts and for filtering and delay distortions. Equalization is carried out after the modem time aligns a signal according to baud time.
Q46.
____ can be used to correct encoded symbols received in error.

a.

Fine filter

b.

Structured redundancy

c.

Tracking loop

d.

De-spreading

Discuss
Answer: (b).Structured redundancy Explanation:If the waveform were to include error detection and correction technique such as FEC coding, structured redundancy would be introduced in the coding process. The structured redundancy is exploited to detect and correct encoded sequences that were received in error.
Q47.
The modem groups the bits to be transmitted into ____

a.

packet

b.

symbol

c.

frame

d.

segment

Discuss
Answer: (a).packet Explanation:The procedure performed for transmission at the modem is the inverse of the procedure performed for reception. The modem groups the bits to be transmitted into packet, and then structured redundancy is introduced for error correction at the receiver.
Q48.
A ____ is used to represent a symbol.

a.

scale

b.

number

c.

figure

d.

waveform shape

Discuss
Answer: (d).waveform shape Explanation:Each symbol is represented by a waveform. The modem synthesizes the waveform and filters it to fit within the desired bandwidth.
Q49.
____ depends on the amount of redundancy in a data stream.

a.

Encryption

b.

Data compression

c.

Encoding

d.

Grouping of data

Discuss
Answer: (b).Data compression Explanation:Data coding has different types of redundancies within a message or between messages. Data compression ranges from 10% to 50% depending on the amount of redundancy present in original information data stream.
Q50.
The modem must control ____ to produce the desired carrier frequency.

a.

filter

b.

low noise amplifier

c.

power amplifier

d.

antenna-matching unit

Discuss
Answer: (c).power amplifier Explanation:The modem controls external RF elements, including transmit and receive mode, carrier frequency and smart antenna. The modem controls power amplifier and local oscillators to produce the desire carrier frequency.
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