Software Defined Radio MCQs : This section focuses on the "Software Defined Radio" in Cognitive Radio. These Multiple Choice Questions (MCQs) should be practiced to improve the Cognitive Radio skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
_______________ is a radio communication system where components that have been traditionally implemented in hardware are instead implemented by means of software on a personal computer or embedded system.
A. Software Architecture
B. Hardware Architecture
C. Software-defined radio
D. None of the above
Explanation: Software-defined radio is a radio communication system where components that have been traditionally implemented in hardware are instead implemented by means of software on a personal computer or embedded system.
A basic SDR system may consist of a personal computer equipped with a sound card.
C. Can be true or false
D. Can not say
Explanation: True, A basic SDR system may consist of a personal computer equipped with a sound card.
________________ allow several transmitters to transmit in the same place on the same frequency with very little interference
A. ultrawideband techniques
B. Spread spectrum
C. Spread spectrum and ultrawideband techniques
D. None of the above
Explanation: Spread spectrum and ultrawideband techniques allow several transmitters to transmit in the same place on the same frequency with very little interference, typically combined with one or more error detection and correction techniques to fix all the errors caused by that interference.
The term software radio was coined in ?
Explanation: The term software radio was coined in 1984 by a team at the Garland, Texas, Division of E-Systems Inc.
Which of the following is not characteristic of a plug and play module?
Explanation: The plug and play module must be compatible with radio environment. It must be controllable under defined module and have predictive usage of resources.
_____ stream characterizes radio surrounding usage in terms of time, frequency, and space.
A. Online adaption
B. Offline adaption
C. Environment management
D. Real-time channel processing
Explanation: Environment management stream characterizes radio surrounding usage in terms of time, frequency, and space. It also includes channel identification and estimation of channel interference levels.
Which among the following is not a part of RF front-end section in receive mode?
A. Antenna-matching unit
B. Low-noise amplifier
D. 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.
GNU radio uses ____ for baseband processing.
Explanation: GNU radio uses general purpose processor for baseband processing. This confines the signal processing capabilities to one particular processor. It is one of limitations of using GNU radio.
Which among the following is not considered as a basic limitation of radio platform?
A. Processing capacity
B. RF coverage
C. Digital access bandwidth
D. Type of service
Explanation: A radio platform has standard limits defined for RF coverage, digital access bandwidth, and processing capacity. All bands and modes with satisfactory link quality available at region of interest and meeting the set limits are considered as useful radio resource.
A software-defined radio can be flexible enough to avoid the limited spectrum.
C. Can be yes or no
D. Can not say
Explanation: Yes, A software-defined radio can be flexible enough to avoid the limited spectrum.