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.
Based on the theory of multicarrier(MC) technique and the Rake receiver, amulticarrier DS-CDMA Rake system is proposed, where a data sequence multiplied by a spreadingsequence modulates multiple carriers. The receiver provides a Rake for each subcarrier, and theoutputs of the Rakes are combined by a maximal-ratio combiner. The average probability of error ofthe 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 multipathintensity profile(MIP) and with a rectangular MIP, respectively, when multipath interference ispresent. It is found that this kind of model has larger superiority in an exponential MIP than in arectangular MIP.
基金
Natural Science Key Projects from Education Department of Hubei Province(2004D002)
