| TD-LTE is also known as LTE-TDD (Long-Term Evolution Time-Division Duplex), is an important communications technology and standards of 4G communications technology, with the TD-LTE standards formulated, the industry chain mature and the rapid development of mobile Internet, TD-LTE has become the focus of the communications industry. When deploying TD-LTE network, TD-LTE system interference becomes one of the key factors that must be considered. Interference of TD-LTE system includes intra-system interference and inter-system interference, this article will study these two interference mechanisms and interference suppression techniques.Intra-system interference refers to mutual interference between wireless network elements inside the mobile communication system, co-channel interference of TD-LTE system mainly refers to the interference between same frequency cells, which is to be solved with the interference coordination, suppression technology. To avoid such interference, the net planning should be noted that the same time slot scheme is allocated in one region as far as possible, combining with upstream and downstream business needs of each region.Inter-system interference can be divided into stray intererence, adjacent channel interference, obstruction interference and receiver intermodulation interference. The method of solving inter-system interference is mainly divided into two types:the installation of filter to RRU and addition of distance between antennas. In addition, we can configure multiple carriers in different frequency bands to get the guard band between the spectrum, if the spectrum resources are relatively abundant.This paper analyzes these two interference mechanism, interference investigation, interference suppression and optimization techniques, and finally also cites typical cases. |
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