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What is the program that is used to speed the spectrum analysis process?(a) DDFT(b) FDFT(c) FGPA(d) Fast Fourier transformsI have been asked this question in final exam.This intriguing question originated from Digital Signal Processing topic in portion Digital Communication Techniques of Avionics

Answer»

The correct ANSWER is (d) FAST Fourier transforms

Explanation: The DFT is a complex program that is long and time-consuming to run. In general, COMPUTERS are not fast enough to perform DFT in real time as the signal occurs. Therefore, a special version of the algorithm has been developed to speed up the CALCULATION. Known as the fast Fourier transform (FFT), it permits real-time signal spectrum analysis.



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