[NJARC] Hedy Lamarr (again)

[antqradio at sbcglobal.net]

I could be wrong on this but I think "frequency hopping" is a very different animal then "spread spectrum."  
The former is used in cellphones with a constant "bandwidth" on a step changing carrier frequency assigned by the local cellphone tower control computer and the latter was Lamarr's contribution, essentially a very wide bandwidth and hopefully undetectable signal.  Perhaps some wireless telephones used in the home use spread spectrum but not cellphones, at least not to my knowledge.Jim
      From: David Sica <dave.sica at njarc.org>
 To: "njarc at mailman.qth.net" <njarc at mailman.qth.net> 
 Sent: Monday, November 9, 2015 2:01 PM
 Subject: [NJARC] Hedy Lamarr (again)
   
Today's Google Doodle is in honor of Hedy Lamarr.    Known in her time as "the most beautiful girl in the world" she was also an inventor and held the patent for, among other things, the spread-spectrum technology underlying our present-day cell phone system.
http://www.google.com/doodles/hedy-lamarrs-101st-birthday



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