CDMA is usually a digital cellular know-how that utilizes spread spectrum procedures to permit multiple users to share the same frequency band, permitting far more efficient use from the offered spectrum.
码片同步 ：指接收端的扩频码与发送端的扩频码在码片时序上的同步。这一过程需要解决码片时序的捕获和跟踪问题，通常采用滑动相关法、匹配滤波法等技术实现。
In the event the 3GPP2 document you are looking for does not appear in almost any with the lists previously mentioned, it should still be below improvement. Documents nearing the ultimate phases of the event system are claimed for being undergoing validation and verification "V and V".
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In lots of cases, HSPA has supplied a price-successful way to raise data speeds and capability without the need for a whole network improve to a newer engineering for instance Extensive-Time period Evolution (LTE).
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This paper describes advancements intimately of here HSPA evolution that can get to performance similar to Those people of long lasting evolution of UMTS terrestrial radio access network in a very five MHz deployment.
采用先进的信号处理技术 ：如使用多用户检测算法来减少多址干扰，从而降低对发射功率的要求。
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As of the writing, HSDPA deployments are still Portion of the very first section. In the next section, HSDPA programs will be able to reach around 42 Mbps data rates. This is quicker than several of currently’s land-based mostly broadband connections.
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This is certainly followed by a last evaluation via the 3GPP2 Steering Committee before publication. Files presently going through the V and V process are accessible listed here. Files at present less than Steering Committee evaluation are accessible in this article.