Question

Which among the following is an advantage of using Fast Fourier Transform (FFT) for spectrum sensing?

(a) Analysis of computation complexity in the FFT window

(b) Analysis of phase in the FFT window

(c) Analysis of period enclosed in the FFT window

(d) Analysis of frequencies enclosed in the FFT window

This question was posed to me by my school principal while I was bunking the class.

My query is from Next Generation Wireless Network in division Next Generation Wireless Network of Cognitive Radio

Answer 1

Right answer is (d) Analysis of frequencies enclosed in the FFT window

The best explanation: Fast Fourier transform is used for performing spectrum sensing by using a wideband analog to digital converter and extensive digital signal processor. This method proves advantageous as it enables the analysis of frequencies enclosed in the FFT window.