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Which among the following allows quality of service measurement?

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Which among the following allows quality of service measurement?

(a) Software capable radio

(b) Software programmable radio

(c) Software defined radio

(d) Aware radio

The question was asked in an interview.

This intriguing question comes from Cognitive Radio topic in section Cognitive Radio Basics of Cognitive Radio

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The correct answer is (d) Aware radio

Easiest explanation: An aware radio provides quality of service measurement and channel state information in addition to the services provided by software defined radio. However it cannot modify the radio parameters according to sensor input.

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