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____ are spectrum bands that exist between channels to minimize interference.

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____ are spectrum bands that exist between channels to minimize interference.

(a) White noise

(b) White space

(c) Empty noise

(d) Empty space

This question was posed to me during an online exam.

Question is from Available Technologies for Cognitive Radio in chapter Cognitive Radio Basics of Cognitive Radio

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Right choice is (b) White space

The explanation is: Spectrum Policy Task Force supports the use of white spaces between spectrums. Unlike analog signal, multiple digital signals can be packed into the spectrum bands, increasing transmission. Thus, white space can be utilized significantly.

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