This study aims to cluster countries according the logistics performance index (LPI) 2018 data. LPI is one of indicators for measuring sector based on a survey developed by World Bank since 2007 and has been widely accepted throughout world. There are 160 involved in organizing edition LPI. It helps understand their current position develop strategies policies improve world trade. Three cluster...

With the increasing demand of applications for spread spectrum technique, especially data transmission rates and spectral efficiency, advantages traditional direct sequence (DSSS) system are limited. Therefore, multi-ary (M-ary) technology, parallel combinatory (PCSS) code index modulation (CIM) technology have been proposed. Although these three new technologies can improve rate, they all face...