TD-LTE Distribution System Optimization And Its Application

In recent years, the rapid development of mobile internet accelerated an explosive growth of data flow. As the government announcing the policy for imformation consumption promotion, mobile internet attracks more data flow requirements than ever before, so that a new generation mobile communication network is demanded to fulfil the increasing data flow growth, for the disability of data flow capacibility of2G and3G mobile communication networks.The4G networks that the three major domestic telecommunication operators are about to build, will use the Chinese leading new generation communication technology, TD-LTE. As an important mean of coverage solutions, TD-LTE distribution system will be under massive construction.The thesis summarizes the development of cellular mobile communication system, briefly describes the structure of TD-LTE network and the concept of distribution system, retrospects the evolution of distribution system in China and aboard, and elaborates the significance of the project and the composition firstly. Then, it introduces the key technical points of TD-LTE, including OFDM modulation, multi antenna technology and frame structure. The varieties and functions of distribution system signal sources, transmission mediums, antennas, and passive devices are also included. And it mainly analyses the anti-interference methods of TD-LTE distribution system in the condicion of multiple networks.The thesis analyses the operating distribution syetem within the office block, and checks the antenna feeder, the service room space, the power supplyment, and the parameters. Accoding to the project requirements and technonical indicators of TD-LTE distribution system, it proposes a binary channels TD-LTE distribution system retrofit scheme that is put into practice. And it optimizes the scheme in output power of binary channels antennas and the positions of antennas to raise the data transmission.Finally, by the testing requirements of TD-LTE distribution system, it provides a serial of tests, including access success rate, single user ping time-lag, handover success rate, call drop rate, single user multiple position throughput capacity, average throughput capacity, single user pink throughput capacity. The results indicate the success of the scheme.