How can the need for array of narrow-band filters and detectors be eliminated?
A. By using multi-channel excitation
B. By using a detector for each frequency
C. By reducing the number of detectors
D. By using Fourier transform
Answer:D
How can the need for array of narrow-band filters and detectors be eliminated?
A. By using multi-channel excitation B. By using a detector for each frequency C. By reducing the number of detectors D. By using Fourier transform
Explanation: Fourier transform plays the role of multichannel receiver. Hence, the need for array of narrow-band filters can be eliminated