A New Class of Zero-Correlation Zone Sequences
Hideyuki Torii, Makoto Nakamura, N. Suehiro · IEEE Transactions on Information Theory · 2004
In this correspondence, two new methods for constructing sets of zero-correlation zone (ZCZ) sequences are proposed. These methods are based on perfect sequences and unitary matrices. Compared with previous methods, the proposed methods can generate sets of nonbinary ZCZ sequences having a longer zero-correlation zone. The sequences obtained by these methods are suitable for approximately synchronized code-division multiple-access (AS-CDMA) systems.