A novel construction method of zero-correlation zone sequences based on complete complementary codes

In an approximately synchronous CDMA (ASCDMA) system, zero correlation zone (ZCZ) sequences are known as the sequences to eliminate co-channel and multi-path interferences. Therefore, numerous constructions of zero correlation zone (ZCZ) sequences have been introduced e.g. based on perfect sequences, m-sequences and complete complementary codes etc.. However, the previous construction method which based on complete complementary code is lacking for merit figure. In this paper, a new construction method of ZCZ sequences based on complete complementary codes is proposed. By proposed method, the ZCZ sequences with greater than 1/2 merit figure are constructable.