基于GPP平台的TD-SCDMA系统物理层关键技术实现与优化
发布时间：2018-10-25 10:26
【摘要】：随着通信技术的快速发展,软件无线电技术在移动通信系统的运用将是未来实现通信系统的一个重要研究方向。TD-SCDMA作为我国拥有自主知识产权的制式,是国内通信领域开发者的研究热点。同时,随着微软亚洲研究院SORA平台的成功开发,以通用处理器作为信号处理平台,配合软件无线电技术实现通信系统的开发模式越来越受到业内研究者的关注,如何在通用处理器上开发出满足实时性要求的移动通信系统将成为研究热点。 基于这样的背景,本文以通用处理器为信号处理平台,应用软件无线电的开发方式搭建TD-SCDMA系统物理层仿真平台,并对链路进行误码率性能测试和时延测试。论文的研究重点是TD-SCDMA系统物理层主要信号处理模块、以及联合检测和波束赋形两个关键模块在通用处理器平台上的设计、实现与优化。在阐述了TD-SCDMA系统物理层基本概念和具体的信号处理流程之后,本文给出了主要模块的实现方法,对于关键模块中联合检测和波束赋形分别采用ZF-BLE和最大接收功率特征分解算法作为实现方法。在此基础上,以查找表、IPP库和SIMD指令三种优化方式来对以上各个模块进行优化,降低信号处理时延。 本文的创新点分主要是在对波束赋形模块的优化时,根据信号处理中涉及到大量的复数矩阵间的乘法,提出了一种由多种SIMD指令组合的波束赋形优化方法,该方法将复数向量和矩阵乘法以及复数矩阵间乘法的多种SIMD指令组合,使复杂的复数运算转化成简单的四则SIMD运算指令,大大降低了信号处理时延,增大数据吞吐率。 本文给出了上行链路、具有波束赋形的下行链路误码率性能仿真以及各个模块时延统计结果,分析并验证了优化效果。由仿真结果可知,基于通用处理器的TD-SCDMA系统物理层信号处理能满足协议误码率和实时性要求,验证了GPP平台在通信系统中应用的可行性。随着通用处理器技术的进一步发展,基于通用处理器平台的通信系统软件无线电开发将成为研究热点。
[Abstract]:With the rapid development of communication technology, the application of software radio technology in mobile communication system will be an important research direction in the future. TD-SCDMA is the standard with independent intellectual property rights in China. Is the domestic communication domain developer's research hot spot. At the same time, with the successful development of the SORA platform of Microsoft Research Institute in Asia, the development model of communication system based on universal processor and software radio technology has attracted more and more attention from researchers in the industry. How to develop a real-time mobile communication system on a general purpose processor will become a research hotspot. Based on this background, this paper uses the universal processor as the signal processing platform to build the physical layer simulation platform of TD-SCDMA system with the development of software radio, and carries on the BER performance test and the delay test to the link. This paper focuses on the design, implementation and optimization of the main signal processing modules in the physical layer of TD-SCDMA system and the two key modules of joint detection and beamforming on the general processor platform. After explaining the basic concept of physical layer and the specific signal processing flow of TD-SCDMA system, this paper gives the implementation method of the main modules. For the key modules, the joint detection and beamforming are implemented by ZF-BLE and the maximum received power characteristic decomposition algorithm, respectively. On this basis, the above modules are optimized by three optimization methods: lookup table, IPP library and SIMD instruction to reduce the delay of signal processing. The innovation of this paper is mainly to optimize the beamforming module. According to the multiplications between complex matrices involved in signal processing, a beamforming optimization method is proposed, which is composed of multiple SIMD instructions. This method combines multiple SIMD instructions of complex vector and matrix multiplication as well as multiplication between complex matrices. The complex operation is transformed into four simple SIMD operation instructions, which greatly reduces the signal processing delay and increases the data throughput. In this paper, the error rate performance simulation of uplink, downlink with beamforming and the statistical results of delay of each module are given, and the optimized results are analyzed and verified. The simulation results show that the physical layer signal processing of TD-SCDMA system based on universal processor can meet the requirements of protocol bit error rate and real-time performance. The feasibility of the application of GPP platform in communication system is verified. With the further development of general processor technology, the development of communication system software radio based on universal processor platform will become a research hotspot.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.53
本文编号：2293437
[Abstract]:With the rapid development of communication technology, the application of software radio technology in mobile communication system will be an important research direction in the future. TD-SCDMA is the standard with independent intellectual property rights in China. Is the domestic communication domain developer's research hot spot. At the same time, with the successful development of the SORA platform of Microsoft Research Institute in Asia, the development model of communication system based on universal processor and software radio technology has attracted more and more attention from researchers in the industry. How to develop a real-time mobile communication system on a general purpose processor will become a research hotspot. Based on this background, this paper uses the universal processor as the signal processing platform to build the physical layer simulation platform of TD-SCDMA system with the development of software radio, and carries on the BER performance test and the delay test to the link. This paper focuses on the design, implementation and optimization of the main signal processing modules in the physical layer of TD-SCDMA system and the two key modules of joint detection and beamforming on the general processor platform. After explaining the basic concept of physical layer and the specific signal processing flow of TD-SCDMA system, this paper gives the implementation method of the main modules. For the key modules, the joint detection and beamforming are implemented by ZF-BLE and the maximum received power characteristic decomposition algorithm, respectively. On this basis, the above modules are optimized by three optimization methods: lookup table, IPP library and SIMD instruction to reduce the delay of signal processing. The innovation of this paper is mainly to optimize the beamforming module. According to the multiplications between complex matrices involved in signal processing, a beamforming optimization method is proposed, which is composed of multiple SIMD instructions. This method combines multiple SIMD instructions of complex vector and matrix multiplication as well as multiplication between complex matrices. The complex operation is transformed into four simple SIMD operation instructions, which greatly reduces the signal processing delay and increases the data throughput. In this paper, the error rate performance simulation of uplink, downlink with beamforming and the statistical results of delay of each module are given, and the optimized results are analyzed and verified. The simulation results show that the physical layer signal processing of TD-SCDMA system based on universal processor can meet the requirements of protocol bit error rate and real-time performance. The feasibility of the application of GPP platform in communication system is verified. With the further development of general processor technology, the development of communication system software radio based on universal processor platform will become a research hotspot.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.53
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