非周期部分 meaning in English

aperiodic component

First of all , correlation properties of orthogonal variable - length spreading sequences are analyzed and new closed - form expressions of mai of the cdma systems are derived in terms of aperiodic partial correlation of variable - length sequences . then , the self - interference ( si ) , mai and bit - error - rate ( ber ) performance of the desired user in a multi - rate cdma system are analyzed
本文首先分析了正交变长扩频序列的相关特性，导出了以变长序列非周期部分相关表示的cdma系统多址干扰( mai )新的分析表达式，并分析了多速率码分多址系统中，期望用户的自干扰( si ) 、多址干扰和误比特( ber )性能。