Quasi-complementary code sets (QCCSs) have attracted sustained research interests for simultaneously supporting more active users in multicarrier code-division multiple-access (MC-CDMA) systems compared to complete complementary code sets (CCCSs). In this paper, we investigate a novel class of QCCSs composed of multiple CCCSs. We derive a new aperiodic correlation lower bound for this type of QCCSs that is tighter than the existing ones and present a systematic construction of such QCCSs with a small alphabet size and low maximum correlation magnitude. We also show that the constructed aperiodic QCCSs can meet the newly derived correlation lower bound asymptotically.

翻译：准补充代码组吸引了持续的研究兴趣,既支持多载器代码司多功能接入系统(MC-CDMA)的更活跃用户,又支持完整的补充代码组(CCCS),在本文中,我们调查了由多个 CCCS组成的新型的QCS类别。我们为这种类型的质量控制组得出了新的定期相关性较低,比现有更紧,并系统地构建了这种字母大小较小、相关度最小的质量控制。我们还表明,已建成的定期质量控制组可以满足新得出的较低约束的关联。