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Wifigps Mobile Phonesbluetooth
wifigps mobile phonesbluetooth a the height of her hollywood career actress hedy lamarr was known as the most beautiful woman in the world. but in the 1940s in an attempt to help the war effort she quietly invented what would become the wireless technologies we use today including bluetooth gps mobile phone networks and more.
Spread C Spectrum Radio
spread spectrum radio scientific american april 1998 95 s he was gorgeous glamorous and talent ed. and she had a mind for technology. in 1941 ac tress hedy lamarr along with the avant garde composer and musician george an theil filed for a pat ent to cover their s ecret communica tion
Bluetooth Basics Courses.cs.washington.edu
frequency hopping spread spectrum n invented by hedy lamarr and george antheil during 1941 n hedy knew that guided torpedos were much more effective hitting a target. the problem was that radio controlled torpedos could easily be jammed by the enemy. n one afternoon she realized were talking and changing frequencies all the time. at
Hedy Lamarr
spread spectrum is the basis of frequency hopping wireless and mobile communications we use today. while a glamorous hollywood star hedy lamarr was key to the patent and using this date draws further attention to the role women in technology have played historically. some valuable hedy information may be located at
Multiple Access Techniques
the mobile phone. for gsm the uplink and downlink frequency bands are . 890 to 915 mhz . cdma is based upon the spread spectrum technique 1. in cdma every channel uses the full available spectrum. hedy lamarr and composer george antheil realized that
The Society Of Core Analysts
networks use a spectrum of frequencies for communication. spectrum was first conceived of by hedy lamarr and george antheil. beauty and screen talent was not enough for the highly intelligent actress. hedy lamarr patented an idea that later became the crutch of both secure military communications and mobile phone technology. in
Wireless Data Networking
the ohio state university raj jain 13 11 metricom q spread spectrum in 902 928 mhz band q in building campus and metropolitan area networking q nearby units can communicate directly. q if the intended destination is not directly reachable go via a node through the network. up to 56 kbps. q nodes are cheap less than 1000 q flat monthly rate based on speed only
Introduction To Wireless Networks
stand. and because a frequency hopping spread spectrum signal shifts among more than one channel it can be extremely difficult for an unauthorized listener to intercept and decode the contents of a signal. spread spectrum technology has an interesting history. it was invented by the actress hedy lamarr and the american avant garde composer george
