Cell Phone History | Wireless

By RaymondSabo
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Cell Phones

Cell phones have had a longer history then the radio. Back in 1920, the cell phones started and the radios weren't used until 1921. Of course, some of the features of the cell phone were utilized as far back as the 1940s. Those radios were used by the police.

The idea of the cellular phone was developed in 1947 as a mobile car phone. Bell Laboratories (also known as Bell Labs and formerly known as AT&T Bell Laboratories and Bell Telephone Laboratories) produced the concept of the cellular phone by introducing cells for mobile phone base stations. Russell Ohl developed the photovoltaic cell (a device that converts light energy into electrical energy.) In 1943, Bell developed SIGSALY (also known as the X System, Project X, Ciphony I, and the Green Hornet), the first digital scrambled speech transmission system used in World War II for the highest-level Allied communications. SIGSALY is not an acronym. It was intended to look like an acrynim but it was just a cover name. SIG was common in Army Signal Corps names. The prototype was called Green Hornet because it sounded like a buzzing hornet to anyone trying to eavesdrop on the conversation. Motorola has a long history of making automotive radio, especially two-way radios for taxicabs and police cruisers. The first actual cell phone was invented in 1973 by Martin Cooper of Motorola and other assisting inventors. It was called the "radio telephone system." He used the idea of the car phone and applied the technology required to make a portable cell phone a reality.

On a New York City street to the amazement of the people walking, Cooper was the first person to make a call on the portable cell phone. The Motorola DynaTAC prototype was used. He made the call to Joel Engel of the AT&T Bell Lab. From this technology there was a shift from the workplace to the person. The birth of personal wireless communications from the vision of Cooper, was born.

In Chicago 1978, the first commercial cellular network using the AMPS (Advanced Mobile System) was introduced. The mobile phone was known as analog. In North America the analog mobile phone system became the one used and ans is still widely available but to various digital standards being introduced is has become less desired.

In 1984 cell phones made its presence to the public but they were very expensive and huge. AT&T and Bell Towers work with the FCC to build towers. There was little power from the towers and they covered a "cell" which covered a few miles in radius. The towers were able to transfer calls from one tower to another.

On a side note, today Cell phone GPS is becoming very popular worldwide.

Ray Sabo - http://www.Cellphones-Mp3.com

About the Author

The background of the cell phone is incredible. They have advanced so far that there is a prepaid cell phones today.

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