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Which among the following is an operating parameter which cannot be adapted?

(a) Frequency

(b) Instantaneous bandwidth

(c) Modulation schemes

(d) Environment

The question was posed to me in examination.

Query is from Adaptive Radio topic in section Cognitive Radio Basics of Cognitive Radio

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The correct answer is (d) Environment

For explanation: An adaptive radio oversees its own performance and is open for modification of operating parameters. Frequency, instantaneous bandwidth, modulation schemes, error correction coding, equalizers, data rate, and transmission power are few examples of operating parameters that can be adapted.

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