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来源：百度知道 编辑：UC知道 时间：2024/06/10 08:16:58
3. Conclusion
Analog 1G wireless cellular systems had many weaknesses, but
their importance cannot be overstated. They showed there was a
huge worldwide market for mobile communication. Digital 2G
technology solved many of the weaknesses of 1G, added services,
and saw the beginning of low speed data communication. Present
cellular systems are based on TDMA and CDMA technologies,
and provide packet data transmission at low rates. Advanced
digital 3G technology represents a quantum leap in technology
from 2G. 3G mobile telecommunications systems pave the way
for future access to advanced multimedia services like mobile
Internet or videoconferencing.
Analog 1G wireless cellular systems had many weaknesses, but
their importance cannot be overstated. They showed there was a
huge worldwide market for mobile communication. Digital 2G
technology solved many of the weaknesses of 1G, added services,
and saw the beginning of low speed data communication. Present
cellular systems are based on TDMA and CDMA technologies,
and provide packet data transmission at low rates. Advanced
digital 3G technology represents a quantum leap in technology
from 2G. 3G mobile telecommunications systems pave the way
for future access to advanced multimedia services like mobile
Internet or videoconferencing.
模拟1克无线蜂窝系统中有很多弱点，但
其重要性怎么强调也不过分。他们发现有一个
巨大的全球市场，为移动通信网络设备。数位第二代
技术解决了很多的缺点， 1克，增值服务，
看到开始的低速数据通信。目前
蜂窝系统是基于TDMA和CDMA技术，
并提供分组数据传输，在低利率。先进
数码3G技术的一大飞跃科技
从第二代。第三代移动通信系统铺平道路
今后有机会获得先进的多媒体服务，如移动
网际网路或电视会议。
介绍手机的