The Electromagnetic Compatibility Research Between WiMAX And TD-SCDMA Communication Systems

Nowadays, the EMC problems among different communication systems are widely focused on and researched. WiMAX technique is a revolutionary access technique which is developing at a full speed in the whole world in recently years. Because the WiMAX signal can transmit as far as 50 kilometers and its network coverage is ten times wider than 3G, however, its frequency band is crossed with TD-SCDMA, it is very necessary to discuss the coexistence problem of the WiMAX system and 3G communication systems, especially the EMI problem of WiMAX signal to TD-SCDMA communication system.The cellular mobile communication is one of the greatest evolutions during the 20 century and the research direction has turned to 3G mobile communication since 21st century. In the 3G main specifications, the TD-SCDMA is a very influential and widely used system, which will play an important role in future communication market. Generally speaking, TD-SCDMA system can receive the interference from the same cellular, other cellular in the same system and interference from other system. So the capacity, coverage and interference should be taken into account totally in system design of TD-SCDMA.Based on the importance of the two communication systems and the possibility of the co-existence, it is very important to research the interference caused by both of the systems. The communication characteristic and mechanism of WiMAX and TD-SCDMA are analyzed detailed based on the theory and then the interference simulation model is established based on MATLAB/SIMULINK. Finally, there is analysis on simulation results in different environments in this paper.