题名汽车远端控制系统中的纠错编码设计及应用
作者李军科
学位类别博士
答辩日期2004
授予单位中国科学院研究生院、中科院声学所
授予地点中国科学院研究生院、中科院声学所
关键词纠错编码 循环冗余校验 卷积码 远端控制
中文摘要纠错编码技术是提高信息传输可靠性的重要手段。随着信息时代到来和微电子技术的飞速发展,纠错码已成为一门关健技术而被广泛采用。在通信领域中,针对不同的物理信道,不同的数据传输要求,采用不同的纠错编码技术。例如,CRC已成为各种线路传输中不可缺少的部分;BCH码、卷积码则被广泛应用于移动系统的、模拟体制的信令传输和数字体制的整个传输,以提高传输的可靠性和珍贵的频谱资源。在纠错编码的具体应用中,采用编码方案获得的编码增益与必须支付的费用(技术、设备的复杂性)是矛盾的两个方面。在不增加设备复杂性的条件下,可以采用软件编码、译码的方法对一些中等编码增益方案予以实现,从而有效的改善数据传输的质量。本文深入研究了纠错编码的基本原理,并在此基础上对工程中常见的几种编码方案BCH(31,21)、RS(15,9)、卷积码(2,1,2)进行软件仿真实现和加性高斯白噪声纠错性能分析。同时,提出、优化设计了一种可用于DSP工程实现的CRC-16循环冗余校验方案,并应用到汽车远端控制系统项目的可靠性数据传输中,在基于移动通信网络GSM、全球定位系统GPS以及DSP的硬件平台上实现了对车辆的远程控制、定位、报警功能。该系统已通过专家组项目鉴定,各项指标符合设计要求。
英文摘要Error Correcting technologys are used to ensure the data transmission reliability. With the approach of Information Era and Micro Electronic tecnology development, Error Correcting has become a key tecnology which is used widely in a data communication system. Based on different physical channels and different transmission correctness, varied Error Correcting Coding will be applied. For example, CRC is indispensable in wire data transmission, while BCH coding and Convolutional coding are used to transmit the Analogy Command and entire digital business in mobile system for the purpose of improving the transmission reliability and saving the precious spectrum resources. In Error Correcting application, the Coding gain is in contradiction with the cost due to the complexity of tecnology and equipment. The coding schemes realized in software, in order to obtain the middle coding gain, are usually adopted in a reliable data transmission system for its not increasing the equipment. In this thesis, firstly, the princple of the Linear Part coding and Convolutional coding is studied. Secondly, three kinds of coding schemes including BCH(31,21), RS(15,9), Convolutinal coding (2,1,2) are software realized in PC for the sake of property analysis on AWGN (additive white aussi noise) channel. Thirdly, according to the need of reliable data transmission in Remote Controlling System for mobiles, a useful engineering algorithm of CRC-16 is proposed, optimized and implemented in DSP software. At the present, the Remote Controlling System, based on GSM,GPS network and DSP controlling platform has been certified by specialists and all the performances such as the remote controlling, the positioning and the alarm are up to the design requirement.
语种中文
公开日期2011-05-07
页码72
内容类型学位论文
源URL[http://159.226.59.140/handle/311008/870]  
专题声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文
推荐引用方式
GB/T 7714
李军科. 汽车远端控制系统中的纠错编码设计及应用[D]. 中国科学院研究生院、中科院声学所. 中国科学院研究生院、中科院声学所. 2004.
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