Graeme Zimmer <gzimmer@...>

Michael wrote:

This will, in part, be a function of the filter flanks, noise etc.
DSP certainly can perform.
I suggest you are comparing Apples with Oranges. It is pointless to compare a poor SSB filter with a good AM filter.

Basic Communications theory says that listening to one Sideband will always give better signal-to-noise ratio than listening to the wider B/W necessary for AM.

Not to mention the advantage of being able to switch sidebands to avoid QRM.

Certainly post-DSP can clean up AM audio, but it can give the same improvement to SSB.

AM can be good, Synchronous AM can do better, selectable SSB will almost always be better still.

The one exception is when the original carrier is unstable (eg has considerable FM).

............ Zim

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