Erlang Capacity of a Power Controlled CDMA System

A limited amount of bandwidth is allocated for wireless services. A wireless system is required to accommodate as many users as possible by effectively sharing the limited bandwidth. Therefore, in the field of communications, the term multiple access could be defined as a means of allowing multiple users to simultaneously share the finite bandwidth with least possible degradation in the performance of the system. There are several techniques how multiple accessing can be achieved. There are various basic schemes like Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA) , Code Division Multiple Access (CDMA), Space Division Multiple Access (SDMA), Random Access (Packet Radio).