The history of the mobile phone is such a remarkable chapter in human's quest for excellence. Since its beginning, plenty of researches had been made in a span of about half a century. man does not stop reinventing & innovating these phones to make life less hard, & fitted to individual lifestyle & needs. it's become the most powerful tool next only to computers.
In the case of america, the account of the mobile phone can be broken down in to seven different important points. First is the characteristic of the mobile phone from its beginning as a car phone leading to the compact phones they know today. Second is the technology used in adopting radio frequency to send voice signals. Third is the pace of development, from a car phone, to being analog, & to its current digital grandeur.
Let us look in to the history of the mobile phone in the aspect of its characteristics.
During the 1940s, mobile phones then were car phones used by police, ambulance services, & trucks. This went on until 1973 when Motorola designed a method that need not be installed in cars. Several years later, the mobile phone method became smaller & more compact.
The technology & the mobile development pace in the history of the mobile phones in the US go side-by-side with these instances. When AT&T through Bell Labs proposed to the Federal Communications Commission (FCC) that a mobile phone method was to be established by placing seven cell or base stations in an area with a less powerful central transmitter to insure continuous communication among the users, the commission hesitated. What they did was to allocate limited frequency to be used as solution to the said proposal. Aside from the limited frequency, the technology to be operated on was not obtainable at that time. It was only acted on after 37 years by giving 800 MHZ. to be implemented by phone companies. The stakeholders themselves caused the delay.
The mobile phone companies meanwhile, continued to improve the technology. AMPS or Advanced Mobile Phone method was invented in the 1980s. This method brought in to play the analog technology, equated to a radio transmitter. The drawback of this technology was that it doesn't enable multiple users simultaneously. Signal is also weak & static when the user moves from seven place to another.
The analog was then replaced by digital technology in the 1990s. Digitals make possible stronger, clearer signals. It also can handle multiple users.
The mobile technology is divided in to seven distinct types, the CDMA, TDMA, & the SMS. These make possible web browsing & international calls. The United States of the united states has yet to generate further innovations but they have made significant & impressive contribution to the development of mobile phones already.
Currently, mobile phone is still being reinvented to cope with man's ever changing standard of living. they are slowly being specialized to suit special needs of individuals.