Bandwidth division type parallel combinatory DS-CDMA system

This paper proposes a bandwidth division type parallel combinatory (PC) spr ead spectrum (SS) modulation scheme. In the proposed system, a given system bandwidth for the conventional single-carrier PC-SS system is divided into H subbands, and H PC-SS signals are transmitted in parallel, We evaluate t he frame error rate (FER) of the proposed system under the asynchronous CDM A environment. We show that the proposed scheme provides a smaller FER than the single-carrier PC-SS system for a given information bit rate. We also show that the proposed scheme attains a higher information bit rate than th e single-carrier PC-SS system for a given FER.