One of many main advantages of CDMA2000 is its spectral efficiency, which enables extra end users to share a similar frequency band, leading to bigger capability and superior overall performance. CDMA2000 is usually backward compatible with 2G CDMA networks, which allows for a clean changeover from 2G to 3G services.
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软切换区： 定义软切换区，确保移动终端在进入新的切换区时能够及时地与新的基站建立连接。
With CDMA, alerts that aren't correlated with the channel of curiosity (including other PN offsets from adjacent cellular base stations) seem as sounds, and indicators carried on other Walsh codes (which have been adequately time aligned) are fundamentally taken off while in the de-spreading approach.
Two novel, multi-antenna receiver constructions for MIMO working in frequency-selective fading environments that offer a major reduction in complexity when compared with other MIMo equalizer constructions are made.
Amount 0 describes the Bodily procedures of jogging a plant. It refers to machinery and other belongings in the sector or on the ground.
Though discussions did happen concerning ETSI and also the ANSI-41 Neighborhood with a look at to consolidating collaboration initiatives for all ITU "family members," in the end it was deemed suitable that a parallel Partnership Undertaking be proven - "3GPP2," which, like its sister task 3GPP, embodies some great benefits of a collaborative effort and hard work (well timed supply of output, fast Doing work approaches), when simultaneously benefiting from recognition being a specs-building physique, providing easier access of the outputs into your ITU immediately after transposition on the specifications in a Standards Enhancement Group (SDO) into a standard and submittal by using the nationwide procedure, as relevant, in to the ITU. That's Concerned?
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All 3GPP2 authorised and posted paperwork can be found within the fall-down menu under. You'll be able to elect to check out and down load files from the whole library, or you may Restrict The end result to Exhibit only documents from one of 3GPP2's Complex Specification Groups (TSGs).
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保密通信 ：扩频信号在频域上与噪声无异，增加了信号截获的难度，增强了通信的保密性。
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Other ahead channels, selected by their Walsh code, have data check here with the network for the mobiles. Data consists of network signaling and person website traffic. Typically, data to be transmitted is split into frames of bits.