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#9
May 2nd 08, 07:15 PM
posted to rec.radio.amateur.antenna
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Disadvantages of using AM for DSSS/FHSS Spread Spectrum?
Jim Pennino wrote:
"The invention of spread spectrum is generally credited to George Antheil and Hedy Lamarr (yes the actress) and their patent of 1942." Yes, I believe Lamarr and her husband encoded several tones in sequence using a player-piano roll. The system was used in WW-2. Poor old Tesla only invented the a.c. power system, wireless power transmission, and demonstrated his remote control of a boat using spread spectrum to avoid interference more than 40 years before Hedy Lamarr`s patent. T.A. Edison did his best to deny Tesla credit for anything. That`s commerce. Best regards, Richard Harrison, KB5WZI |
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