Subj : Re: Spread Spectrum
To   : debian
From : k9zw
Date : Tue Aug 16 2022 07:14:19

Spread Spectrum is not limited to FM or any particular sort of modulation scheme.  https://en.wikipedia.org/wiki/Spread_spectrum

What I had in mind was a subset of the whole area, Frequency Hopping Spread Spectrum.  https://en.wikipedia.org/wiki/Frequency-hopping_spread_spectrum

Any interesting HFSS tidbit "In 1942, actress Hedy Lamarr and composer George Antheil received U.S. Patent 2,292,387 for their "Secret Communications System", an early version of frequency hopping using a piano-roll to switch among 88 frequencies..."

Earlier Tesla mentioned the basic concept in patent 725,605 from 1903.

The later Zinn enhancements are interesting, as they reduced the need to externally sychronize RX with TX.  

Lots going on here, so hoping I haven't pointed you down a rabbit-hole...

--- Steve K9ZW via SPOT BBS 

--- Mystic BBS v1.12 A48 2022/02/11 (Linux/64)
 * Origin: SPOT BBS / k9zw (700:100/69)

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