Performance Analysis of CDMA Systems with Adaptive Modulation Scheme(Special Issue on Multiple Access and Signal Transmission Techniques for Future Mobile Communications)

概要

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In this paper, we evaluate the average bit error rate (BER) and bits per symbol (BPS) performances of CDMA system employing the adaptive modulation according to the position of mobile station since the performance of CDMA system is highly dependent on user location especially in the downlink, and further we evaluate the overall performance by considering the user distribution at the level of cell. To evaluate the performance of the considered system in the forward link, we derive the distribution of the received signal to noise ratio (SNR) by Mobile Station located at arbitrary cell position with which we investigate the average BER and BPS performances of the common shared channel, one of the downlink channels of beyond IMT-2000 systems such as 1xEV-DO, 1xTEME and HSPDA. As a result, we observe that the CDMA system adopting the adaptive modulation can get about 2.47 bits per symbol at the cell level, while satisfying the required BER performance over all cell area.
社団法人電子情報通信学会の論文
2003-01-01