In the case of the United States, on account of mobile phone can be divided into three important points. The first feature from the outset as a phone in the car leads to a compact phones we know today. The second is the technology used in making radio frequencies to transmit voice signals. The third is the pace of development, from car phones to analog and digital its current size.
Let us look at the history of mobile phone in the aspect of its properties.
During the 1940s, mobile phones, car phones were then used by police, ambulance and trucks. This lasted until 1973 when Motorola designed a system that does not need to be installed in cars. Several years later, they became smaller and more compact.
of mobile technology and the pace of development in the history of mobile phones in the U.S. go shoulder to shoulder with these cases. When AT & T Bell Labs through a proposed Federal Communications Commission (FCC) that the mobile phone system to be established by setting the six stations or base stations in the area with a less powerful central transmitter to ensure continuous communication between users, the Commission hesitated. What they did was to allocate limited frequencies to be used as a solution to said proposal. In addition to the limited frequency technology to work on was not available at this time. It is only acted on after 37 years, giving 800 MHz. which will be conducted by telephone tvrtke.Dionici for the delay.
mobile phone companies, meanwhile, continues to refine the technology. Amplifier or advanced mobile phone system was invented in 1980. This system brought into play analog technology, equated with primopredajnika.Nedostatak this technology is that it does not allow multiple users at the same time. The signal is weak and static when the user moves from one place to another.
then replaced the analog digital technology in 1990. Digitals provide stronger, clearer signals. It also can handle more users.
mobile technology is divided into three distinct types, CDMA, TDMA, and SMS. These provide access to the Internet and international pozive.Sjedinjene States still create further innovation, but have made significant and impressive contribution to the development of mobile phones already.
Currently, it is always to deal with a man who changes everything standard of living. They gradually specialized to suit the special needs of individuals.
OVERSIGHT Technology Group Inc.
... or "phone", is connected via a radio frequency-based transmitter and receiver stations that connect users to the conventional telephone network ....
