# Tag Info

This makes sense. A DC offset will shift the envelope just as demonstrated here. The analytic signal of a constant alone is the same constant since the Hilbert Transform will not pass a mean (or "DC offset"), and the process of transforming a signal to the analytic signal is linear. Therefore $$f_a\{K+x(t)\} = f_a\{K\} + f_a{x(t)}$$ where here \$f_a\...