The paging channel consists of signaling messages transmitted through the network to all idle mobiles. A list of messages connect detailed network overhead to your mobiles, circulating this details though the paging channel is totally free.
DSSS is Direct Sequence Spread Spectrum Technique which is a spread spectrum method by which the data to generally be transmitted is encoded utilizing spreading code and gained and afterwards decoded using the similar code.
Convergence of packet communications over the developed mobile networks; signal processing and protocol efficiency
移动通信中，将话音信号转换为数字信号，给每组数据话音分组增加一个地址，进行扰码处理，并且将它发射到空中。
EVDO is actually a packet-switched cellular data technologies Employed in cdma2000 networks. The EVDO necessities are according to trustworthiness and spectral efficiency to enable nearly two.forty five Mbps inside the Original release for that ahead hyperlink (downlink) which is answerable for downloads. The uplink or reverse hyperlink for EVDO provides the exact same 153.six kbps that cdma2000 1x get more info gives.
3GPP2 requirements and stories are converted into standards by each from the Challenge's Organizational Companions. Use the drop-down menu beneath to see a desk cross-referencing the 3GPP2 specification or report to its Organizational Spouse counterpart.
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Overall, 3GPP2 has played a important purpose in the event and evolution TIA/EIA (Telecommunications Industry Association/Electronic Industries Alliance) of CDMA-centered wi-fi conversation networks.
帧同步 ：指将接收的数据序列按照传输时的帧结构正确地划分开来。帧同步一般需要在码片同步的基础上，利用特定的同步序列进行。
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The voice services is often facilitated through the Voice over IP (VoIP) technological know-how or perhaps a cdma2000 1 x fallback. The latter is the more widespread solution employed by CDMA-based mostly mobile operators.
There's no data carried around the ahead pilot. With its sturdy autocorrelation functionality, the forward pilot allows mobiles to ascertain process timing and distinguish diverse BTSs for handoff.
Более высокая защищённость (скрытность) каналов. Выделить нужный канал без знания его кода весьма трудно.