Title :
Zero Correlation Zone Sequence Sets over the 8-QAM+ Constellation
Author :
Li, Yubo ; Xu, Chengqian
Author_Institution :
Dept. of Inf. Sci. & Eng., Yanshan Univ., Qinhuangdao, China
fDate :
11/1/2012 12:00:00 AM
Abstract :
In this letter, constructions of zero-correlation zone (ZCZ) sequence sets over the 8-QAM+ constellation are presented. The resultant ZCZ sequence sets have flexible parameters and are optimal with respect to the Tang-Fan-Matsufuji bound in some cases. These ZCZ sequences over the 8-QAM+ constellation can be used in quasi-synchronous CDMA (QS-CDMA) communication systems to remove the multiple access interference (MAI) and multi-path interference (MPI).
Keywords :
code division multiple access; correlation theory; quadrature amplitude modulation; sequences; QAM+ constellation; Tang-Fan-Matsufuji bound; ZCZ sequence sets; quasi synchronous CDMA communication system; zero correlation zone sequence set; Correlation; Interference; Multiaccess communication; Multiple access interference; Quadrature amplitude modulation; Vectors; 8-QAM+ constellation; Zero correlation zone (ZCZ); ternary perfect sequence;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2012.092112.121217
