CDMA技术早已在军用抗干扰通信研究中得到广泛应用，1989年11月，  Qualcomm在美国的现场试验证明CDMA用于蜂窝移动通信的容量大，并经理论推导其为AMPS容量  的20倍。这一振奋人心的结果很快使CDMA成为全球的热门课题。-CDMA technology has long been in the study of military interference communication is widely used, in November 1989, Qualcomm field trials in the United States for proof largest CDMA cellular mobile communication capacity, and by theoretical derivation which is 20 times the AMPS capacity. The results of this exciting soon make CDMA become a global hot topic.