Mobile Radio System Around the World
A number of mobile radio standards have been developed for wireless systems throughout the world till date and many more will be developed in the years to come.
Mobile radio standards
- AMPS
- NAMPS
- IS-95
- GSM
- All these mobile standard and developed in North America.
- In 1979 a Japanese company named Nippon Telephone and Telegraph Company (NTT) implemented the world's first cellular telephone system
- The European Total Access Cellular System (ETACS) was deployed 1985. The American system AMPs was almost identical to ETACS.
- The earlier European systems were not compatible to one another because of different frequencies used and different communication protocols being used by them.
- These systems are being replaced by the GSM (Global System for Mobile) system now. This system was developed in 1990 for the entire Europe in a new 900 MHz band.
- The GSM standard is worldwide accepted as the first universal digital system.
 |
| Feature and Standard of mobile Radio System |
Full Form of Mobile Radio System
- PCS full form of Personal Communication Services
- TDMA full form Time Division Multiple Access
- FDMA full form Frequency Division Multiple Access
- CDMA full form Code Division Multiple Access
- BPSK full form Binary Phase Shift Keying
- QPSK full form Quadrature PSK
AMPS FULL FORM
ReplyDelete