single per carrier system (SPCS)

Single Per Carrier System (SPCS) is a multiple access method used in mobile communications. In this method, each partial frequency channel forms a separate transmission channel for user communication.

The SPCS technique is based on narrowband transmission channels that are selected using filtering techniques. SPCS technology was used in the first mobile communications systems and was later replaced by Frequency Division Multiple Access( FDMA), Time Division Multiple Access( TDMA) and Code Division Multiple Access( CDMA).