The world is demanding more from wireless communication technologies than ever before. More People around the world are subscribing to wireless services and consumers are using their phones more frequently. Add on features of Third-Generation (3G) wireless data services and applications – such as wireless email, web, digital picture taking/sending and assisted-GPS position location.
This is where CDMA (Code Division Multiple Access) technology fits in. CDMA consistently provides better capacity for voice and data communications than other commercial mobile technologies, allowing more subscribers to connect at any given time, and it is the common platform on which 3G technologies are built.
CDMA technology
Multiple Access : The concept behind multiple access is to permit a number of users to share a common channel. The two traditional ways of multiple access are Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA).
FDMA : In Frequency Division Multiple Access, the frequency band is divided in slots. Each user gets one frequency slot. assigned that is used at will. It could be compared to AM or FM broadcasting radio where each station has a frequency assigned. FDMA demands good filtering.
