This is the basic idea behind a technique called spread-spectrum frequency hopping, where signals are rapidly and randomly switched across a wide range of different frequencies to improve the security and reliability of wireless communication. Who invented it? Numerous inventors contributed to the ...
1944: Hedy Kiesler Markey (better known as the actress Hedy Lamarr) and George Antheil patent spread spectrum frequency hopping, a way of making wireless communication more reliable and secure by transmitting and receiving on different radio frequencies. 1970s: First analog cellphones appear, develop...