Interference analysis and reduction in cellular network

摘要

A fundamental problem in cellular network, as well as in many other disciplines (wireless communication), is finding a suitable interference reduction methods. Radio links cannot be created over infinite distances and will be limited in range by interference. In this study two special cases are considered: In the first scenario, varying the load factor and antenna tilt to reduce the Co-channel interference for GSM network and the second case optimizing the prediction model to minimized adjacent channel interference for WCDMA system has been addressed. The variability of different interference with the cellular system parameters has been investigated. The result shows that the ACI decreased (16%) after optimizing WINLOS models. The ACIR values reach 30 dB which is acceptable range to minimize the capacity loss. C/I ≥ 12 dB can be increased by 3% when changing mechanical tilt by 4 degree. All the interference reduction methods have an impact on the cell coverage area or capacity and therefore they need to be planned carefully.