History : Cell Phones

Running Head: CELL PHONES1Cell PhonesNameInstitutional AffiliationCELL PHONES2A cell phone is a type of a radio that is extremely sophisticated. It was invented in 1876by Alexander Graham Bell as telephone and in 1880s Nicolai Tesla invented the radio and theythen combined these technologies through a wireless communication. The technology of acellular system is in dividing a city into so many small cells so as to allow frequency distributionacross the whole city. This enables millions of peoples to use simultaneously their cell phones.The ancient cellphone carrier received 800frequencies in order to distribute it across the city.After chopping the city into cells, each cell would end up sized at 10 square miles hence thefrequency distributed in routes of hexagons. During this time, the cell system used one-seventhof duplex voice channels available. Each cell ended up getting about 56 voice channels. Unlikethe ancient cell, the digital cellphone has a TDMA-based system which enables them to carrycalls three times as many as the ancient cellphone. Thus, each cell has about 168channelsavailable (Briere, Hurley & Ferris, 2013).Cell phones mostly have two signa ...


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