On the SS-CSC system with a synchronizing spreading code

M-ary spread spectrum communication (M-ary/SS) systems have been growing in interest because their bit error rate performance can approach Shannon´s limit. However, M-ary/SS systems have two serious problems, namely a complexity of the system and an instability of synchronization. The authors reported the spread spectrum communication constrained spreading code (SS-CSC) system which has a simple structure. In the paper, the SS-CSC system with a synchronizing spreading code is proposed. In particular, bit error rate (BER) properties of the proposed system are evaluated. Consequently, it is found that a canceller is useful to reduce the cross-correlation value between each spreading code for information and the synchronizing spreading code. Moreover, the BER performance of the proposed system with the canceller is better than that of the M-ary/SS system with a canceller under conditions of the same frame length. The BER performance of the proposed system is much the same as that of the bi-orthogonal system