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WCDMA与CDMA | 骆驼调频
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WCDMA与CDMA
2009年03月06日 Wireless ⁄ 共 315字 暂无评论 ⁄ 被围观 215 views+

WCDMA是国外的3G制式一种,在中国推行的是TDSCDMA, WCDMA采用直接序列扩频码分多址(DS-CDMA)、频分双工(FDD)方式,码片速率为3.84Mcps,载波带宽为5MHz.基于Release 99/ Release 4版本,可在5MHz的带宽内,提供最高384kbps的用户数据传输速率。W-CDMA能够支持移动/手提设备之间的语音、图象、数据以及视频通信,速率可达2Mb/s(对于局域网而言)或者384Kb/s(对于宽带网而言)。

目前有4种3G模式(CDMA2000 WCDMA TDSCDMA WINMAX)

WCDMA是从码分多址(CDMA)演变来的,但两者互不谦容。

目前电信的CDMA还不是3G格式,CDMA是2G格式。

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