TD-LTE-A系統(tǒng)多點(diǎn)協(xié)作下的能量效率研究
[Abstract]:With the continuous development of wireless mobile communication technology, the research of TD-LTE-A system by 3GPP organization has never stopped as the key technology of TD-LTE-A system, which not only improves the rate of transmission of system information. It can reduce the signal interference of the cell and improve the throughput of system users especially the edge users in terms of extending cell coverage and improving the throughput of system users. At the same time, with the continuous innovation of communication technology, the related energy consumption is also increasing. In order to meet the needs of green communication, the research of system energy efficiency is also carried out one after another. Therefore, the energy efficiency of TD-LTE-A system under Co MP is studied in this paper. In this paper, the Co MP technology in TD-LTE-A system is studied, and the classification of Co MP technology, collaboration set and network scene are summarized and summarized. Then, the resource allocation, beamforming and power allocation algorithms in TD-LTE-A system are studied. For resource allocation algorithm, this paper analyzes the principles of polling algorithm, maximum load to interference ratio algorithm and proportional fairness algorithm. Compared with other algorithms, proportional fair algorithm can not only balance the fairness among users but also improve the system capacity. Thus it has better performance; For the beamforming algorithm, the principle of zero forcing, minimum mean square error, block diagonalization and signal-to-noise ratio algorithm is analyzed. Through simulation and comparison, the signal-to-noise ratio beamforming algorithm can effectively reduce the interference between users. Have good performance; For power allocation, the principle of water injection algorithm is introduced in this paper. The analysis shows that the water injection algorithm can achieve the optimal system throughput through the optimal allocation of power. Then, the energy efficiency of TD-LTE-A isomorphic multi-cell collaboration is optimized. Firstly, the scene of isomorphic multi-cell collaboration is analyzed and the optimization model of system energy efficiency is established. Then, the energy efficiency of the system is optimized by combining resource allocation, beamforming and power allocation. An iterative energy efficiency algorithm based on isomorphic multi-cell collaboration is proposed. The simulation results show that the proposed algorithm can be used to optimize the energy efficiency of the system. The energy efficiency of the system can be optimized when the throughput of the system decreases slightly. Finally, the performance parameters of the system are analyzed on the platform of TD-LTE-A isomorphic multi-cell collaboration system. Finally, this paper optimizes the energy efficiency under the cooperation of base station and low power RRH in TD-LTE-A heterogeneous single cell. Firstly, the scene of cooperation in heterogeneous single cell is analyzed and the optimal model of system energy efficiency is established. Then the energy efficiency of the system is optimized by the iterative optimization algorithm proposed in this paper, which combines the resource allocation, beamforming and power allocation algorithms, and achieves the optimal energy efficiency under the cooperation of the base station and the low power RRH in a single cell. Finally, the performance parameters of the system are analyzed on the system level simulation platform between the base station and the low power RRH cooperation system in the TD-LTE-A heterogeneous single cell.
【學(xué)位授予單位】:哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2015
【分類號(hào)】:TN929.5
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