Radio transfer system for digital signals between several subscriber terminals and base station

摘要

The invention relates to a novel code division multiple access, code multiplex (CDMA) system structure which is identical to the structure of a CDMA system operating with direct code spread (DS, direct sequence) but which operates by a multiple carrier system (MC). The multiple carrier system is introduced by appropriate selection of the spread code with the result that signal generation in CDMA systems is unified with DS and with MC, and known joint detection processes with or without diversity reception are used.