Interference Coordination And Coordinated Multi-Points Transmission In Lte System

To cater to the highly developing of lobal wireless communication,3GPP proposed LTE system as a Beyond3G mibile communication system. In order to meet the performance requirements of the next generation communication system in average throughput, edge throughput and data rate, etc, LTE system uses a variety of key technologies, including Orthogonal Frequency Division Multiple access mode, multiple antenna technology, Interference Coordination technology, Link Adaptive technology and Coordination Multi-Point transmission technology, etc. The starting point of the research work is to eliminate the inter-cell interference of LTE system, this paper studys interference suppression scheme in LTE system, respectively from the interference coordination and cooperative communication, and evaluated system performance through LTE system level simulation platform. My work mainly includes:1) According to the3GPP LTE system physical specifications, the author designed and realized the construction of LTE system level simulation platform, and also completed several key modules:scenario building module, wireless communication module, resource scheduling module, link adaptive modules and decoding module.2) This thesis researchs the interference coordination in LTE system, I stressed on two aspects:frequency multiplexing scheme, resource scheduling scheme. This paper analyzes the performance of two frequency multiplexing scheme from the system performance and resource utilization, In addition, we did some performance research where frequency multiplexing scheme combined with various resources scheduling mode, and finally analyses the advantages and disadvantages of various solutions.3) Through the collaborative multipoint transmission technology research, this thesis proposes a cooperative method based on relay system. Through multiple nodes collaborative, we obtain diversity, coding gain, and reduce the transmission power. Through the simulation experiment and analysis of the data, it comes to a conclution that the scheme improves in the system performance and the complexity.