Top latest Five Short Messaging Services (SMS) Urban news
Top latest Five Short Messaging Services (SMS) Urban news
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Because its formation, 3GPP2 has unveiled many standards, including the CDMA2000 number of standards for 3G wireless conversation networks.
开环功率控制 ： 开环功率控制是基于接收信号强度的预测进行的，它不需要反馈信息。在移动终端接入网络时，会根据信号的衰落特性预先设定发射功率。开环控制主要用于解决信号在传播过程中遇到的路径损耗问题。
When the mobile device moves, the network performs a handoff, transferring the data session to a fresh channel or foundation station seamlessly to maintain connectivity.
With CDMA, alerts that aren't correlated with the channel of interest (like other PN offsets from adjacent cellular base stations) show up as sounds, and alerts carried on other Walsh codes (that are appropriately time aligned) are in essence eliminated from the de-spreading course of action.
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This paper presents an overview of The fundamental radio interface ideas for that 3G very long-term evolution idea, which include OFDM and Highly developed antenna Option, and provides overall performance final results indicating to what extent the requirements/targets is usually fulfilled.
The fundamental attributes which enable boost in read more data throughput and capacity with lessened latency are given beneath:
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切换决策： 当监测到相邻基站的信号强度达到一定阈值时，移动终端通知网络进行切换。
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灵活性高： 多载波系统能够更容易适应不同的数据速率和带宽要求，提供更加灵活的服务。
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называется фактором распространения или базой сигнала и определяет в известной мере верхний предел числа пользователей, поддерживаемых базовой станцией одновременно.