Effect of adjacent IS-95 network to WCDMA uplink capacity

The paper derives the degradation of wideband code-division multiple-access (WCDMA) uplink capacity in the situation where an IS-95 system is deployed at the adjacent frequency band. A system modeling approach that combines accurate path loss information with simplified and computationally fast interference modeling is also described. The model takes into account the power-control coupling between IS-95 and WCDMA systems as well as the effect of downlink blocking. The paper also includes some numerical examples from realistic micro- and macrocellular network scenarios. The results show that the interference is dependent on, in addition to the filter characteristics, the used network scenario, whether the interfered or interfering system is microcellular or macrocellular, and on the relative cell densities of the interfering and interfered networks. The developed method can be utilized for WCDMA network planning, for frequency allocation, and for system design of the mobile telecommunication systems.