本文選題：LTE下行接收鏈路　切入點：系統(tǒng)實現(xiàn)　出處：《北京郵電大學》2014年碩士論文　論文類型：學位論文

【摘要】：TD-LTE是我國擁有自主知識產權的第四代移動通信技術,以正交頻分復用(OFDM)技術和多輸入多輸出(MIMO)技術為核心,具有高峰值數(shù)據速率、低傳輸時延和高移動性的特性。通用處理器平臺(General Purpose Platform, GPP)具有高效的指令級并行處理能力,因其能極大得提高LTE系統(tǒng)的實時信號處理能力而成為當下研究的熱點。 本論文主要工作和創(chuàng)新是對TD-LTE系統(tǒng)的下行接收鏈路在通用處理器(GPP)平臺進行了實現(xiàn)和優(yōu)化。通過對下行無線鏈路的設計,實現(xiàn)了TD-LTE下行接收鏈路的主要模塊功能,包括自動增益放大、小區(qū)搜索時頻同步、解前端、信道估計、信道均衡、解資源映射以及后續(xù)的比特級處理流程。為了優(yōu)化TD-LTE系統(tǒng)的下行接收鏈路性能,從微處理器內核架構入手,提出了編譯器優(yōu)化、SISD指令優(yōu)化和SIMD指令優(yōu)化的方法。通過實驗驗證了所設計模塊的正確性,給出了下行接收鏈路各模塊耗時分布性能等。結合鏈路實現(xiàn)部分采用的優(yōu)化方法,總結了在GPP平臺上對TD-LTE下行接收鏈路進行優(yōu)化的整體方案,對其他類型的GPP平臺的性能實現(xiàn)與優(yōu)化具有很好的借鑒意義。
[Abstract]:TD-LTE is a 4th generation mobile communication technology with independent intellectual property rights in China. It has high peak data rate with the core of orthogonal Frequency Division Multiplexing (OFDM) and multiple input and multiple output (MIMO) technologies. General Purpose platform (GPPs) has high command level parallel processing capability, which can greatly improve the real-time signal processing capability of LTE system. The main work and innovation of this paper is to realize and optimize the downlink of TD-LTE system on the platform of GPP.Through the design of downlink wireless link, the main module function of TD-LTE downlink is realized. It includes automatic gain amplification, cell search time-frequency synchronization, de-front-end, channel estimation, channel equalization, de-resource mapping and subsequent bit-level processing. In order to optimize the downlink reception performance of TD-LTE system, Based on the microprocessor kernel architecture, the methods of compiler optimization for SISD instruction optimization and SIMD instruction optimization are proposed. The correctness of the designed module is verified by experiments. In this paper, the time-consuming distribution performance of each module of downlink receiving link is given. Combined with the optimization method adopted in link realization, the overall scheme of optimizing downlink of TD-LTE on GPP platform is summarized. For other types of GPP platform performance implementation and optimization has a good reference significance.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5

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本文編號：1597254