Performance evaluation of a cellular CDMA system using RAKE receiver over frequency-selective fading channels
Jeich Mar, Hung-Yi Chen · 2002
The effect of multipath fading on the performance of cellular code division multiple access (CDMA) using an ideal RAKE receiver is analyzed in this paper. A wide-sense stationary uncorrelated scattering (WSSUS) channel model and the coherent BPSK modulation with asynchronous direct-sequence (DS) spreading signal are assumed in the analysis. The average error probabilities for both the forward link and reverse link of the cellular CDMA system over frequency-selective fading channels are derived. The impact of imperfect power control on the performance of the cellular CDMA system is also investigated. The analytical results show that the performance of the cellular CDMA system degrades with an increase in the number of simultaneous users and the number of interfering cells. The performance degradation due to imperfect power control will increase with the variation range of the unfaded received amplitude for each user.