geraldj wrote:
> > For the simple reason that DSP NR is
> > really a bandwidth-narrowing device.
> NOT AT ALL!
NR is an adaptive filter, and adaptive filter IS a filter,
its sole purpose being that of bandwidth reduction.
What makes is different from "ordinary" filters is the
adaptive method of tuning, and not the filtering action itself.
> All the good NR techniques use the high correlation of a desired signal
> and the relative lack of correlation of noise to discriminate between
> the two. At least that's what the books about NR that I've read said.
That describes the method of tuning, not the signal processing.
Once tuned ["adapted"], NR works just like any other filter.
Of course, it will automatically retune itself if/when needed.
73,
Sinisa YT1NT, VE3EA
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