Study on the Coexistence Interference between TD-SCDMA and WCDMA

摘要

As the third generation mobile communication business,interference is one of the key issues for wireless network optimization.How to work with other communication systems is a crucial issue to ensure system performance in 3G networks.This article focuses on the analysis of adjacent channel interference between TD-SCDMA and WCDMA systems in the 1920MHz frequency.The interference mathematical model of two systems was discussed to quantitative analysis minimum isolation requirements,including the model of spurious interference,intermodulation interference and blocking interference.The adjacent channel interference ratio AC1R and minimum coupling loss MCL were derived by using deterministic algorithm.Through using spatial segregation or installing a digital band-pass filter can effectively suppress interference and make two systems achieve coexistence and co-stiting,the conclusion indicated the necessary isolation was 74 dB which has a certain significance for engineering practice.