Question

Radio sensing is a technique that utilizes ____

(a) hearing sensors

(b) electromagnetic sensors

(c) image sensors

(d) acoustic sensors

The question was asked by my school principal while I was bunking the class.

My question is from Location Awareness in chapter Location and Environment Awareness in Cognitive Radio of Cognitive Radio

Answer 1

The correct answer is:

(b) electromagnetic sensors

Explanation:

Radio sensing in the context of cognitive radio typically refers to the ability to detect and monitor the radio frequency spectrum using electromagnetic sensors. These sensors are capable of detecting electromagnetic waves, which are used for communication signals in the radio spectrum. Cognitive radio systems use radio sensing to identify available spectrum, detect interference, and adapt to the surrounding environment.

• Hearing sensors and acoustic sensors are more related to sound waves, not electromagnetic waves.
• Image sensors are used for visual detection, not related to radio spectrum sensing.

Thus, electromagnetic sensors are the correct choice for radio sensing in cognitive radio systems.