LTE系统中的MIMO预编码技术研究

发布时间：2018-05-12 22:29

本文选题：多输入多输出 + 闭环与开环　；参考：《南京理工大学》2014年硕士论文

【摘要】：近些年,无线通信技术进入了一个高速发展的阶段,无线通信的终端数正与日俱增,这就对当今的无线数据传输速率以及通信质量提出了更高的要求与挑战。多输入多输出(MIMO)技术就是在这样的背景下发展起来的,并迅速成为了无线通信的热门研究领域。MIMO技术不仅可以提高链路的传输速率,也提高了系统的可靠性,具有很大的实用价值。MIMO技术可以分为开环与闭环MIMO技术。在开环MIMO系统中,发送端无法获得信道信息,但发送端能够利用开环MIMO技术来增强接收端接收到信号强度或者获得空间复用增益。在闭环MIMO系统中,发送端利用接收端反馈回来的信道信息进行信号预处理,从而获得增益。本文围绕LTE系统中的预编码技术,对以下几个方面进行了研究：开环MIMO预编码技术的实现方案以及适用场景；闭环MIMO预编码技术的具体实施以及应用场景；基于闭环交替差分码本预编码技术的实现方案以及性能分析。通过仿真,分析了各种预编码技术的优点与缺点。
[Abstract]:In recent years, wireless communication technology has entered a stage of rapid development, and the number of wireless communication terminals is increasing, which puts forward higher requirements and challenges to the wireless data transmission rate and communication quality. Multi-input multiple-output (MIMO) technology is developed under this background, and has rapidly become a hot research area of wireless communication. MIMO technology can not only improve the transmission rate of links, but also improve the reliability of the system. It has great practical value. MIMO technology can be divided into open loop and closed loop MIMO technology. In an open-loop MIMO system, the sender can not obtain channel information, but the sender can use open-loop MIMO technology to enhance the received signal strength or gain spatial multiplexing gain. In the closed-loop MIMO system, the transmitter uses the channel information feedback from the receiver to preprocess the signal and obtain the gain. This paper focuses on the precoding technology in LTE system and studies the following aspects: the implementation scheme and applicable scenario of open-loop MIMO precoding technology, the concrete implementation of closed-loop MIMO precoding technology and the application scenario; The implementation scheme and performance analysis based on closed loop alternating differential codebook precoding technology. Through simulation, the advantages and disadvantages of various precoding techniques are analyzed.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5

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