基于Maotu DSP的TD-LTE上行接收端物理控制信道全链路设计与实现
发布时间：2019-03-16 13:32
【摘要】：随着社会对无线通信的广泛需求,LTE技术现在已经投入我们的日常生活中。三大运营商同时推出TD-LTE服务,带宽大、速率高、稳定性好使其成为未来的发展趋势。在中国,作为新兴技术的TD-LTE家庭基站由于其安装简单、性能稳定、功耗低,有着巨大的发展空间和实际应用价值,其中基带芯片的完全自主研发势在必行。基带芯片物理层的上行控制信道作为不可或缺的一部分,决定着信道传输质量等多个重要因素,也就决定着基站各部分的性能。在这个背景下,本文完成了基于Maotu DSP的TD-LTE上行接收端物理控制信道全链路设计与实现。首先本文介绍了TD-LTE及物理层控制信道的基本概念、协议流程。主要介绍了LTE的发展过程、发展现状及未来趋势,并对TD-LTE关键技术做了简要说明,并简要介绍了家庭基站在国内外的发展情况,进而介绍了TD-LTE物理层协议的基础知识,包括物理层帧结构和物理层基本参数的含义,并简要介绍了物理层控制信道格式1/1A/1B/2/2B的发送端设计流程。然后本文对物理层控制信道上行接收端做了基于浮点C模型的设计和实现。在VC++和Matlab为基础的软件环境下对浮点模型的算法进行了实现。主要模块包括解SC-FDMA符号、信道估计、滤波去噪、信道均衡、快速傅里叶变换、解正交振幅调制、子载波平均及符号平均。本文还对各个模块的函数接口设计进行了说明,并将浮点C模型和标准仪表数据进行比较,画出物理层控制信道各格式接收模型的性能曲线,并做出分析,证明C模型的性能符合协议规定。最后本文根据中科院自行研制的Maotu DSP的软件及硬件特点对浮点C模型的设计方案进行了定点实现及优化。主要的技术有浮点数的定点化,包括整体的定点规则和每个模块的定点设计。还有Maotu DSP使用的标量指令集及向量指令集在各个模块中的使用方法和优化技巧,并设计了各个模块的程序流程图。然后对本文的DSP开发流程做了结果展示,并对浮定点模型性能做了均方误差统计,证明与浮定点模型的一致性,从而证明定点模型符合协议规定,并对各模块内的函数运行效率与吞吐率做了统计与比较,完成定点模型的性能分析。本文的创新点在于基于中科院计算所完全自主研发的Maotu DSP,对TD-LTE物理层控制信道的基站接收端进行了设计与实现,也是Maotu DSP首次应用于TD-LTE物理层控制信道的设计,对未来Maotu DSP的其他设计及完全自主研发基带芯片的设计及应用起到了参考的作用。
[Abstract]:With the wide demand of wireless communication, LTE technology has been put into our daily life. At the same time, the three operators introduce TD-LTE service, which has the advantages of high bandwidth, high speed and good stability, which makes it a trend in the future. In China, as a new technology, TD-LTE home base station has great development space and practical application value because of its simple installation, stable performance and low power consumption, in which the complete independent research and development of baseband chip is imperative. As an indispensable part of the uplink control channel in the physical layer of the baseband chip, the transmission quality of the channel is determined by many important factors, and the performance of each part of the base station is also determined. Under this background, the full-link design and implementation of the physical control channel of TD-LTE uplink receiver based on Maotu DSP is completed in this paper. Firstly, this paper introduces the basic concept and protocol flow of TD-LTE and physical layer control channel. This paper mainly introduces the development process, present situation and future trend of LTE, and briefly explains the key technology of TD-LTE, and briefly introduces the development of home base station at home and abroad, and then introduces the basic knowledge of TD-LTE physical layer protocol. This paper includes the frame structure of physical layer and the meaning of basic parameters of physical layer, and briefly introduces the design flow of transmitter of physical layer control channel format 1/1A/1B/2/2B. Then, this paper designs and implements the uplink receiver of physical layer control channel based on floating-point C model. The algorithm of floating-point model is implemented in the software environment based on VC and Matlab. The main modules include de-SC-FDMA symbol, channel estimation, filtering de-noising, channel equalization, fast Fourier transform, de-orthogonal amplitude modulation, sub-carrier average and symbol average. This paper also explains the function interface design of each module, compares the floating-point C model with the standard instrument data, draws the performance curve of each format receiving model of the physical layer control channel, and makes the analysis. It is proved that the performance of the C model is in accordance with the protocol. Finally, according to the characteristics of software and hardware of Maotu DSP developed by Chinese Academy of Sciences, the design scheme of floating-point C model is realized and optimized. The main techniques include the fixed-point of floating point, including the whole fixed-point rule and the fixed-point design of each module. There are also the use methods and optimization techniques of scalar instruction set and vector instruction set used by Maotu DSP in each module, and the program flow chart of each module is designed. Then the results of the DSP development process of this paper are shown, and the mean square error statistics of the floating point model is made, which proves the consistency with the floating point model, and thus proves that the fixed point model conforms to the protocol. The efficiency and throughput of the function in each module are analyzed and compared, and the performance analysis of the fixed-point model is completed. The innovation of this paper is that the base station receiver of TD-LTE physical layer control channel is designed and implemented based on Maotu DSP, developed by the Institute of Computing, Chinese Academy of Sciences. It is also the first time that Maotu DSP has been applied to the design of TD-LTE physical layer control channel. It can be used as a reference for the other design of Maotu DSP and the design and application of baseband chip.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
本文编号：2441466
[Abstract]:With the wide demand of wireless communication, LTE technology has been put into our daily life. At the same time, the three operators introduce TD-LTE service, which has the advantages of high bandwidth, high speed and good stability, which makes it a trend in the future. In China, as a new technology, TD-LTE home base station has great development space and practical application value because of its simple installation, stable performance and low power consumption, in which the complete independent research and development of baseband chip is imperative. As an indispensable part of the uplink control channel in the physical layer of the baseband chip, the transmission quality of the channel is determined by many important factors, and the performance of each part of the base station is also determined. Under this background, the full-link design and implementation of the physical control channel of TD-LTE uplink receiver based on Maotu DSP is completed in this paper. Firstly, this paper introduces the basic concept and protocol flow of TD-LTE and physical layer control channel. This paper mainly introduces the development process, present situation and future trend of LTE, and briefly explains the key technology of TD-LTE, and briefly introduces the development of home base station at home and abroad, and then introduces the basic knowledge of TD-LTE physical layer protocol. This paper includes the frame structure of physical layer and the meaning of basic parameters of physical layer, and briefly introduces the design flow of transmitter of physical layer control channel format 1/1A/1B/2/2B. Then, this paper designs and implements the uplink receiver of physical layer control channel based on floating-point C model. The algorithm of floating-point model is implemented in the software environment based on VC and Matlab. The main modules include de-SC-FDMA symbol, channel estimation, filtering de-noising, channel equalization, fast Fourier transform, de-orthogonal amplitude modulation, sub-carrier average and symbol average. This paper also explains the function interface design of each module, compares the floating-point C model with the standard instrument data, draws the performance curve of each format receiving model of the physical layer control channel, and makes the analysis. It is proved that the performance of the C model is in accordance with the protocol. Finally, according to the characteristics of software and hardware of Maotu DSP developed by Chinese Academy of Sciences, the design scheme of floating-point C model is realized and optimized. The main techniques include the fixed-point of floating point, including the whole fixed-point rule and the fixed-point design of each module. There are also the use methods and optimization techniques of scalar instruction set and vector instruction set used by Maotu DSP in each module, and the program flow chart of each module is designed. Then the results of the DSP development process of this paper are shown, and the mean square error statistics of the floating point model is made, which proves the consistency with the floating point model, and thus proves that the fixed point model conforms to the protocol. The efficiency and throughput of the function in each module are analyzed and compared, and the performance analysis of the fixed-point model is completed. The innovation of this paper is that the base station receiver of TD-LTE physical layer control channel is designed and implemented based on Maotu DSP, developed by the Institute of Computing, Chinese Academy of Sciences. It is also the first time that Maotu DSP has been applied to the design of TD-LTE physical layer control channel. It can be used as a reference for the other design of Maotu DSP and the design and application of baseband chip.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5
【参考文献】
相关博士学位论文 前1条
1 杨君;专用指令集处理器（ASIP）体系结构设计研究[D];中国科学技术大学;2006年
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