|Movie star Hedy Lamarr is generally credited as co-originator of the idea of spread spectrum transmission. She and her pianist were issued a patent for the technique during World War II.
From the whatis.com definition for frequency-hopping spread spectrum
Frequency hopping means broadcasting a signal over a series of radio frequencies, switching from frequency to frequency at split-second intervals. A receiver hopping between the same frequencies in sync with the transmitter can pick up the message, while eavesdroppers hear only random blips. It also is known as frequency- hopping code division multiple access.
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