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The paper is to study the effect of the variation of major parameters on OFDMA systems and to find channel estimation for CDMA/OFDMA communication systems, in which the bit/symbol error rate of a time varying channel has to be estimated in order to correct the channel interference prior to the decoding of information symbols. Also to propose a system that makes full use of the advantages of OFDMA and WCDMA to improve the performance of the overall system. With the advantages of WCDMA and OFDMA a new multiple access technique has been developed called OWCFDMA Multiple Access, by properly combining WCDMA and OFDMA, the system makes good use of their superiority and greatly improves the performance. The whole project is done with MATLAB.
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