Technology Evolution for Mobile and Personal Communications.

Technology Evolution for Mobile and Personal Communications.

Nota:

• Copyright 2000. Lucent Technologies Inc. Bell Labs Technical Journal January–March 2000

1. Bell Labs has had a major role in launching the multi-billion dollar wireless communications industry.

   Nota:

   • Many of the fundamental discoveries in communications theory and the key enabling technologies—such as the vocoder, steerable antennas, and the cellular concept—have come from Bell Labs research.
   1. Radio research started in the Bell System in 1914
   2. The experimental work at Bell Labs directed towards mobile systems led to the first commercial mobile telephone system in 1946, a push-to-talk system that required operator intervention
2. Wireless communications has a rich history, dating back to the fundamental experiments performed by Heinrich Hertz in the 1880s and by Guglielmo Marconi towards the end of the nineteenth century