Performance analysis for multi-channel assignment schemes in CDMA cellular systems

The CDMA system promisingly provides more capacity than AMPS. However, providing multi-channels for a CDMA system is a requisite to satisfy the demand of capacity. Two schemes of multi-channel assignment are proposed. Based on the formulation of intra-cell interference and inter-cell interference, the capacity can be determined. The Markov chain approach is adopted to model the intra-cell-interference and inter-cell interference for the proposed channel assignment schemes. By solving the state probabilities, performance measures, e.g. blocking probabilities, the overall capacity and the capacity of each channel are obtained. Analytical results indicate that SIR-based selection scheme is preferable to the other.