Performance analysis of chip rate division multiple access (CRDMA) technique

Abstract

In this paper, a novel multiple access scheme, chip rate division multiple access (CRDMA), based on CDMA is proposed, which helps to increase the capacity of a CDMA system by dividing users not only by different codes but also by different chip rates. Both synchronous and asynchronous CRDMA systems are considered in this paper. A method based on cross-correlation level statistics to analyze BER of an asynchronous CDMA/CRDMA system is introduced and the performance for both CRDMA and normal CDMA systems using various orthogonal code families, such as M-sequences, Gold, Gold-like, Kasami and Walsh codes, is compared.