Introduction to the Theory of Spread Spectrum Communications

Most wireless data systems today are spread spectrum modulated, operating in the ISM (Industrial, Scientific and Medical) bands at 900 MHz, 2.4GHz or 5.8GHz.

Spread spectrum modulation was invented by the Austrian-born actress Hedy Lamarr and composer George Antheil in 1942, but did not become commercially used until the 1960s.

Hedy Lamarr died in January 2000.

Hedy Lamarr - George Antheil 'Secret Communications System Patent, by Chris Beaumont
An article by George Antheil's son, including GIFs of the original patent.
The Principle of Spread Spectrum Communication, by Jack Glas.
A very readable overview of Spread Spectrum in mostly mathematical terms. Explains why SS is jam-restistant, and also explains the difference between Frequency Hopping and Direct Sequence variants of Spread Spectrum.
Wireless Field Test Project Reports, by Dave Hughes of Old Colorado City.
Not Just Another Pretty Face, a biography of Hedy Lamarr
Includes a biography and a bibliography.
Hedy Lamarr: Not your typical nerdy inventor.

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  Revision 1.1  2000/01/21 05:28:37  lars
  Add Lamarr-Antheil patent and links.