Topband: Noise cancelling

[by way of Bill Tippett <btippett@alum.mit.edu>]

From: "Thomas Damboldt" <Thomas.Damboldt at T-Online.de>

Hi topbanders,

noise cancelling by just computing the difference between the 
frequency of a signal with noise  and a neighboring frequency with 
noise only will not work if the noise is of statistical nature (white 
noise). But what happens in case of man-made-noise if on both, the 
receiving frequency with a weak signal and a neighbouring frequency 
with noise only, the (pulsed) noise of our electric environment is 
-probably not exactly- but more-or-less the same? Would in this case 
letting the sound card plus PC calculate the difference be of any use?

73, Tom, DJ5DT