[sdiy] Spread Spectrum Communications - interesting historical link

[John L Marshall]

This is the same Hedy Lamar that successfully sued Corel for using a strong
likeness of her to promote Corel Draw.

Hedy Lamar's patent, I believe, covers primarily frequency-hopping spread
spectrum. The technology used in some cellular telephone systems is
direct-sequence spread spectrum. Two psudo-random sequences, long (40 days?)
and short multiply to do the spreading. Up to 64 Walsh Codes separate the
channels all on the same carrier and provide additional spreading. Hey!
Walsh Code fans.

John


----- Original Message -----
From: Rob B <cyborgzero at home.com>
To: synth-DIY <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, October 23, 2001 10:40 PM
Subject: Re: [sdiy] Spread Spectrum Communications - interesting historical
link


> Is that the same Hedy Lamar in Blazing Saddles? ;)
>
> I know i know.. prlly not.. hehe..
>
> Rob
>
> ----- Original Message -----
> From: Grant Richter <grichter at asapnet.net>
> To: <owner-synth-diy at dropmix.xs4all.nl>; synth-DIY
> <synth-diy at dropmix.xs4all.nl>
> Sent: Wednesday, October 24, 2001 12:09 AM
> Subject: [sdiy] Spread Spectrum Communications - interesting historical
link
>
>
> > An interesting link about Hedy Lamar and George Antheil (Ballet
> Mechanique)
> > invention of spread spectrum communications. Interesting historical
> > footnote.
> >
> > http://www.ncafe.com/chris/pat2/index.html
> >
> >
>