cdma外文翻译.doc

CDMA
If we categorize wireless phone systems by their access method , we can classify each system into one of three categories. These access categories are frequency division multiple access( FDMA), time-division multiple access(TDMA),and code-division multiple access(CDMA),with the later representing the focus of this chapter.
This chapter will first describe and discuss the work of Qualcomm, which is the company that primarily developed a large portion of CDMA technologies . Once this is accomplished ,the chapter will examine the technology associated with CDMA, as well as the transmission of data as the wireless access method .Because CDMA was selected recently as the basis for a new generation of broadband wireless transmission ,the chapter will conclude by focusing on this

如果把无线电话系统按照它们的接入方式分类，我们可以将每个系统归到以下三类：频分多址(FDMA),时分多址(TDMA)和码分多址（CDMA）,其中后者是本文的重点。
本文首先描述并讨论Qualcomm公司的工作，该公司是首先发展CDMA技术的公司。然后讨论与CDMA相关的技术和基于这种无线接入的数据传输。由于 CDMA在最近被选为新一代宽带无线传输系统的基础。
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