Interference Analysis Of Multi-system Combination Of Mobile Communication Indoor Coverage

Along with the development of society, the public are looking forward to more advanced communication methods. They hope to communicate with anybody by anywhere and anytime, and also hope to have high quality communications. But there are more and more higher buildings in modern cities. And more complex structure in the buildings make the wireless signals less effective. And in BCD and the high-dense areas for mobile subscriber, the deficiency of spectrum is more serious. All these problems make mobile operators find more efficiency and more flexible method of the indoor coverage system.Since 2000, China Mobile and China Unicom have built separate indoor coverage system. So it is very difficult to solve the interference between these systems. And new systems will be required if there are new operators. Due to the limitation of indoor space for equipments and cables, there must be some difficulties to technical and implementation.So it is necessary to study the multi-system for mobile communication of indoor coverage.The multi-system of mobile communication indoor coverage could fulfill the indoor coverage by one or more POIs. The multi-system of mobile communication indoor coverage could not only meet the demands of current mobile operators, but also build the solid foundation of future development of wireless communication systems. It would also upgrade the quality of indoor communication, and promote the source opening of indoor coverage. It will provide a new way to solve the difficulty of outdoor macro base station.The implementation of multi-system combination needs technical support. Spurious emission, intermodulation, blocking could do harm to different systems. And they would affect the performance of receivers. As to the multi-system combination of mobile commnunication indoor distribution, these factors could not be ignored. Thanks to the development of science and technology, now people can do effective analysis to the interference. And we can provide some methods to the multi-system combination.This paper introduces the function of mobile communication indoor coverage system and importance of multi-system at first. Then it gives an overview of the main kinds of interference in multi-system of mobile communication indoor coverage. Via a practical project, it shows the key point of multi-system design.