CDMA是Qualcomm公司的专利技术。它结合了多种先进通信技术,其中一个重要的部分就是独特的“扩频”技术,该技术突破了有限的频率带宽的限制。与传统的数字及模拟技术不同,扩频技术不是分配给每个用户一个狭窄的频率信道或时隙,而是在一个较宽的蜂窝频段上传输多路通话或数据,使多个用户可以使用同一频率来通话,并采用独特的编码来区分各路通话,而且这种编码能确保更高的保密性。因 CDMA is Qualcomm’s patented technology. It combines a variety of advanced communications technologies, an important part of which is the unique “spread spectrum” technology that breaks the limits of limited frequency bandwidth. Unlike traditional digital and analog technologies, instead of allocating a narrow frequency channel or time slot to each user, spread spectrum technology transmits multiple conversations or data over a wide range of cellular frequencies, allowing multiple users to use The same frequency to call, and use a unique code to distinguish each call, and this code to ensure greater confidentiality. because