多载波直接序列扩频码分多址系统的性能分析
PERFORMANCE ANALYSIS OF MULTICARRIER DS CDMA SYSTEMS
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摘要: 本文将多载波发送信号技术应用于直接序列扩频码分多址系统中。发射机中直接扩频序列与数据序列相乘,然后调制多个载波;接收机对每个载波进行相关,相关器的输出用最大比值合并。这种发送信号具有很好的窄带干扰压缩性能。文中估计了存在部份带宽干扰下系统的性能,并与单载波直扩码分多址系统进行了比较。
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关键词:
- 码分多址; 直扩; 多载波; 干扰
Abstract: In this paper，A multicarrier signaling technique is applied to a direct-sequence CDMA system．A data sequence multiplied by a spreading sequence modulates multipte. Carriers in transmitter，the receiver provides a correlator for each carrier, and the ouputs of the correlators are combined with a maximal-ratio combiner．This type of signaling has the desirable properties of a narrow band interference suppression effect．The system performance is evaluated in the presence of partial band interference，it is compared with that of a single-carrier DS CDMA system. -
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