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Multiple-input multiple-output (MIMO) antenna technology under study multiple base stations feedback

Author: LiChangJiang
Tutor: HuangRuiGuang
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: Precoding Feedback LTE PMI
CLC: TN919.3
Type: Master's thesis
Year: 2011
Downloads: 27
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Abstract


In the next generation mobile communication system, through the cooperative multi -point transmission (COMP) way to increase system throughput and edge user is an important research direction. In the collaborative multi-point transmission technology , a plurality of base stations can transmit simultaneously to the same edge users useful signal . On the other hand , in the wireless MIMO communication system , the user can channel information feedback to the base station in order to improve system performance. And how in the COMP condition feedback channel information to the base station in order to improve system performance, as the main content of this paper . This paper begins with a brief review of some of the basics. Describes multi-input multi-output system, the basic model and the basic principles , concepts and precoding pre-coding principle , LTE system, the principle and process feedback . Then the cooperative multi-point transmission systems are discussed and analyzed. For the case of collaborative multi-point , then feedback can be in two ways: joint feedback and feedback , respectively . The so-called combined feedback refers to the user feedback information reflecting a large joint all the base stations need. User feedback means , respectively , for each cell separately feedback. Joint feedback should be better performance , this paper through the combination of theoretical analysis and simulation methods prove this conclusion. There are two joint feedback codebook , the joint codebook and a combination of codebook . Although the joint codebook performance, but the case for multi-cell encoding flexibility is not enough. It produces modular codebook . The code number of each cell of the original combination of truth . Our portfolio codebook has been improved, increasing the time delay difference feedback. And compares the improved combination of the codebook and the combination of code performance. Simulation results show improvements codebook obtained after a good performance.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Data communication > Data transmission technology
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