Question

Which among the following is achieved by coupling a modulated signal with a sine wave carrier?

a.

Causality

b.

Periodicity

c.

Linearity

d.

Stability

Posted under Cognitive Radio

Answer: (b).Periodicity Explanation:Modulated signals are coupled with sine wave carriers, hopping sequences, or cyclic prefixes to attain periodicity. The signals are regarded as cyclostationary due to periodic mean and autocorrelation.

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Q. Which among the following is achieved by coupling a modulated signal with a sine wave carrier?

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