论文部分内容阅读
3G 是什么“3G 已经为人们所耳熟能详,那么您知道到底什么是3G 通信吗?所谓3G,它的全称为3rd Generation,中文含义指第三代数字通信。第一代模拟制式手机(1G)和第二代 GSM、CDMA 等数字手机(2G)。1995年间世的第一代数字手机只能进行语音通话;而1996到1997年出现的第二代数字手机便增加了接收数据的功能,如接收电子邮件或网页;第三代与前两代的主要区别是在传输声音和数据的速度上的提升,它能够处理图像、音乐、视频流等多种媒体形式,提供包括网页浏览、电话会议、电子商务等多种信息服务。”
What is 3G? “3G is already familiar to people, so you know what is 3G communication? The so-called 3G, its full name is 3rd Generation, the Chinese meaning refers to the third generation of digital communications. The first generation of analog standard mobile phone (1G) And second-generation digital handsets such as GSM and CDMA (2G). The first generation of digital handsets in 1995 produced only voice calls; the second generation of digital handsets from 1996 to 1997 increased the ability to receive data, Receive e-mail or web pages. The main difference between the third generation and the first two generations is the speed of voice and data transmission. It can handle a variety of media such as images, music and video streams and provide web browsing, teleconferencing , E-commerce and other information services. ”