扩频多址 meaning in English

cdma

Analysis of capacity in ds ssma communication system
扩频多址系统的容量及性能分析
Capacity and performance of mobile radio systems essentially depend on the choice of the multiple access scheme . a novel and promising wireless digital modulation / multiple access technique called multicarrier cdma is studied in this thesis , including reducing the peak - to - average ratio , which is one of its key techniques . mc - cdma is combination of ofdm and cdma , thus advantages of both techniques are exploited
移动通信系统的容量和性能在很大程度上取决于多址方案的选择，本文主要讨论了在通信领域新兴的扩频多址方式一多载波cdma ( mc - cdma ) ，并对降低mc - cdma系统峰值平均功率比这一关键技术进行了研究。
The direct - sequence ( ds / ss ) multiple access , also know as code - division access ( ds - cdma ) , has significant advantages in the areas of capacity , frequency planning , privacy , and resistance to multipath fading to cellular and personal communication system . it has been the important manner of multiple access in the 3rd generation mobile communication system
由于直接序列扩频多址接入技术（也叫ds - cdma ）在蜂房移动通信系统中显示出的良好性能：系统容量大，频率规划简单，频率复用系数高，抗多径能力强，保密性，抗干扰能力强等， ds - cdma在第三代移动通信系统中已经成为首选的多址接入方式。