4 research outputs found
New Correlation Bound and Construction of Quasi-Complementary Code Sets
Quasi-complementary sequence sets (QCSSs) have attracted sustained research
interests for simultaneously supporting more active users in multi-carrier
code-division multiple-access (MC-CDMA) systems compared to complete
complementary codes (CCCs). In this paper, we investigate a novel class of
QCSSs composed of multiple CCCs. We derive a new aperiodic correlation lower
bound for this type of QCSSs, which is tighter than the existing bounds for
QCSSs. We then present a systematic construction of such QCSSs with a small
alphabet size and low maximum correlation magnitude, and also show that the
constructed aperiodic QCSSs can meet the newly derived bound asymptotically