| Performance of Multicarrier CDMA Rake System over Rayleigh Fading Channel |
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| 作者姓名： | SONGLi-xin HUANGTian-shu DINGYao-ming |
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| 作者单位： | [1]SchoolofElectron.Inform.,WuhanUniversity,Wuhan430072,CHN [2]Dept.ofPhys.,XiaoganUniversity,Xiaogan432100,CHN |
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| 摘 要： | Based on the theory of multicarrier (MC) technique and the Rake receiver, a multicarrier DS-CDMA Rake system is proposed, where a data sequence multiplied by a spreading sequence modulates multiple carriers. The receiver provides a Rake for each subcarrier, and the outputs of the Rakes are combined by a maximal-ratio combiner. The average probability of error of the system is derived from an uncorrelated subcarrier and frequency-selective fading channel model. The system performances are evaluated over Rayleigh fading channel with an exponential multipath intensity profile(MIP) and with a rectangular MIP, respectively, when multipath interference is present. It is found that this kind of model has larger superiority in an exponential MIP than in a rectangular MIP.
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| 关 键 词： | CDMA 瑞利衰落信道 倾斜接收机 MIP 移动通信 |
| 收稿时间： | 2004/10/27 |
Performance of Multicarrier CDMA Rake System over Rayleigh Fading Channel |
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| SONGLi-xin HUANGTian-shu DINGYao-ming.Performance of Multicarrier CDMA Rake System over Rayleigh Fading Channel[J].Semiconductor Photonics and Technology,2005,11(2):129-134. |
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| Authors: | SONG Li-xin HUANG Tian-shu DING Yao-ming |
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| Abstract: | Based on the theory of multicarrier (MC) technique and the Rake receiver, a multicarrier DSCDMA Rake system is proposed, where a data sequence multiplied by a spreading sequence modulates multiple carriers. The receiver provides a Rake for each subcarrier, and the outputs of the Rakes are combined by a maximal-ratio combiner. The average probability of error of the system is derived from an uncorrelated subcarrier and frequency-selective fading channel model. The system performances are evaluated over Rayleigh fading channel with an exponential multipath intensity profile(MIP) and with a rectangular MIP, respectively,when multipath interference is present. It is found that this kind of model has larger superiority in an exponential MIP than in a rectangular MIP. |
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| Keywords: | Multipath intensity profile Multicarrier CDMA Rake receiver Rayleigh fading |
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