Question

Which among the following is accomplished by sampling sub-Nyquist in wideband FFT spectrum sensing?

a.

Reduction of complexity

b.

Improved signal detection

c.

Reduced power consumption

d.

Shorter time delay

Posted under Cognitive Radio

Answer: (d).Shorter time delay Explanation:Time delay and interleaving time can be controlled by sampling sub-Nyquist and by using appropriate filters in wideband FFT spectrum sensing. The short delay simplifies compatibility with MAC layer timing.

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Q. Which among the following is accomplished by sampling sub-Nyquist in wideband FFT spectrum sensing?

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