Title :
A new class of zero-correlation zone sequences
Author :
Torii, Hideyuki ; Nakamura, Makoto ; Suehiro, Naoki
Author_Institution :
Dept. of Network Eng., Kanagawa Inst. of Technol., Japan
fDate :
3/1/2004 12:00:00 AM
Abstract :
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.
Keywords :
code division multiple access; correlation theory; spread spectrum communication; CDMA; approximately synchronized code-division multiple-access; cochannel interference; perfect sequences; spreading sequences; unitary matrices; zero-correlation zone sequences; Autocorrelation; Cellular networks; Educational technology; Interchannel interference; Local area networks; Materials science and technology; Mobile communication; Multiaccess communication; Upper bound; Wireless LAN;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2004.825399
