What is digital spread spectrum as used in cordless telephones?
Digital spread spectrum (DSS) technology has its roots back in World War II and has evolved into the technology of choice for the cordless phone (as well as many other sophisticated communications systems, especially in the military). Cordless phones are now truly “ready for prime-time” thanks to affordable DSS technology. Spread spectrum technology can be implemented in several different ways, but the most common and easiest to understand involves frequency hopping. This technique was co-invented by actress Hedy Lamarr during World War II, to help direct American torpedoes and prevent them from getting jammed and sent off-course. Lamarr and her arranger invented the frequency-hopping concept. Since Lamarr didn’t use her stage name on the patent, it took years for the story of
