Extra exam question E7F03

WhyA Hilbert-transform filter is the digital signal processing filter used to generate an SSB signal. A Hilbert-transform filter is the digital signal processing filter used to generate an SSB signal, producing a version of the audio shifted 90 degrees in phase relative to the original, which is exactly what's needed for the phasing method of SSB generation, answer C. An adaptive filter is used for noise reduction rather than SSB generation, a notch filter removes a narrow band of frequencies, and an elliptical filter is a sharp-cutoff filter shape, neither of which performs the phase-shifting function a Hilbert transform provides.