On the capacity degradation due to coexistence of WCDMA and CDMA2000 systems

In this paper, we investigate the capacity degradation due to the coexistence of WCDMA and CDMA2000 networks by system-level Monte Carlo simulation. Both systems are simulated according to the deployment of macro cells, and speech service is considered. The capacity losses under different carrier spacing and different geographical offset are evaluated. Simulation results show that considerable capacity loss is seen when WCDMA is the victim system, while the influence of WCDMA to CDMA2000 is slight. Increasing carrier-to-carrier spacing and decreasing geographical offset lead to less capacity loss and co-locating the base stations of both systems is a preferred solution.