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 delayI had been asked this question in an international level competition.My enquiry is from Next Generation Wireless Network in section Next Generation Wireless Network of Cognitive Radio

Which among the following is accomplished by sampling sub-Nyquist in w

1.	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 delayI had been asked this question in an international level competition.My enquiry is from Next Generation Wireless Network in section Next Generation Wireless Network of Cognitive Radio
Answer» Correct choice is (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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