Question

The secondary user intentionally senses surrounding environment in ____

(a) policy approach

(b) database approach

(c) active awareness

(d) passive awareness

I had been asked this question in an online interview.

I would like to ask this question from Available Technologies for Cognitive Radio in portion Cognitive Radio Basics of Cognitive Radio

Answer 1

The correct choice is (c) active awareness

The explanation is: In active awareness, the secondary user actively senses surrounding environment and performs transmission based on the obtained information. In passive awareness, the radio environment information is obtained outside the secondary communication system.