On the performance of multicarrier RAKE systems

Abstract
We integrate the multicarrier signaling technique and the RAKE receiver to design a DS CDMA system with the capability to increase the data rate, mitigate the effect of correlation among the various subcarriers, and suppress partial-band interference. In the proposed system, a data sequence is serial-to-parallel converted, and multicarrier DS CDMA is used on each of the parallel data streams, The receiver provides a RAKE for each subcarrier, and the outputs of the RAKEs are combined by a maximal-ratio combiner. We derive the average probability of error of the system and compare the results with those of both a single carrier RAKE system and a multicarrier DS CDMA system, when multiple access interference, partial-band interference and multipath interference are present.

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