Performance Analysis Of Co-Existence Between TD-LTE And TD-SCDMA

Interference in mobile communication systems has been an important research topic aspect. There are many kinds of interferences, such as spurious interference, obstruction interference, inter-modulation interference and so on. Also, there are lots of System analysis methods for coexistence of adjacent-channel interference, and that can be divided into two categories, deterministic calculation method and system simulation methods.This paper describes how to use the method of deterministic calculation to analyze the interference of base stations between TD-LTE system and TD-SCDMA system. According to a variety of base station transceiver features and wireless performance targets, such as the adjacent channel power leakage (ACLR) and spurious interference from the transmitter; as well as the adjacent channel selectivity (ACS) and blocking features from the receiver. Meanwhile the situations of co-area and co-location are considered. The additional isolation is obtained for resolving the co-existence problem between TD-LTE systems and TD-SCDMA system.This paper focuses on the Monte Carlo simulation method for the system coexistence by building the static simulation platform, and the interferences between the two systems were studied in detail. This article describes the system model of adjacent-channel interference power ratio (ACIR), interference model and evaluation criterions. Three different offset conditions are considered, due to the adjacent channel interference between systems, the capacity loss and throughput loss performance in uplink and downlink are simulated, and a rational analysis and Interpretation is given.More importantly, some useful and proposal calculation results and conclusions for the coexistence of TD-LTE system and TD-SCDMA system are presented in this paper.