Performance of multicode DS-CDMA systems for reverse links over Nakagami-m fading channels

In this paper, the performance analysis of noncoherent multicode DS-CDMA systems for reverse links of the cdma2000 Radio Configurations 1 and 2 over Nakagami-m frequency-selective fading channels is evaluated. The transmission system is intended to serve multi-rate multimedia applications suitable for data, voice, image, and video conveyance. A RAKE receiver structure with square-lam, and equal gain combining is used for demodulation. A statistical characterization is applied into the multiple access interferers (MAI), which could be modeled as a Gaussian distribution, and thereby, the exact bit error rate (BER) of the system with uncorrelated diversity branches over Nakagami-m channels may be derived. Numerical results over the Nakagami-in channel, which gives severe, moderate, light, and no fading environments via adjusting its fading figure, are also provided in terms of different data rates and number of users.