卷积码的盲识别研究

发布时间：2018-05-04 19:15

本文选题：信道编码 + 盲识别　；参考：《中国科学技术大学》2009年硕士论文

【摘要】： 信道编码盲识别是在未知编码信息的条件下,仅根据未知的编码数据快速识别编码体制及其参数,是非协作通信中的一个关键技术。在未来的智能移动通信、多点广播通信中,将广泛采用自适应调制编码技术,随着时间和环境的变化需要随时改变信道编码方式,以便获得最优的通信效率和服务质量,为了在收发双方快速建立通信连接,需要接收方仅根据接收的未知数据快速识别出信道编码的体制、参数,以达到智能通信的目的,这也需要利用信道编码盲识别技术。信道编码盲识别是一个比较专业的研究领域,目前公开发表的文献资料很少,并且主要集中在对卷积码的盲识别,是一个极具挑战性的研究课题。本文总结了信道编码盲识别技术的研究现状,介绍了几种卷积码盲识别方法并分析了它们的优缺点,针对其不足提出了改进算法和实现方案,仿真实验表明,改进算法提高了卷积码的盲识别性能,取得了预定效果。本文的所做的主要工作总结如下: 本文主要研究方向是卷积码的盲识别,首先通过对[n,k]系统线性分组码的线性特征进行分析,基于系统分组码线性特征,建立了线性分组码盲识别的原理和方法;其次,分析了线性分组码和卷积码的数学对应关系,借鉴系统线性分组码的盲识别方法研究了无误码条件下几类卷积码的盲识别问题;然后分析了误码条件下卷积码盲识别性能,探讨了一些可能的改善途径。最后对全文进行总结展望,提出了进一步解决信道编码盲识别问题的研究方法和思路。
[Abstract]:Blind recognition of channel coding is a key technique in non-cooperative communication, which is based on unknown coding data and fast identification of coding scheme and its parameters only on the condition of unknown coding information. In the future intelligent mobile communication, multi-point broadcast communication, adaptive modulation coding technology will be widely used. With the change of time and environment, the channel coding method needs to be changed at any time in order to obtain the optimal communication efficiency and quality of service. In order to establish the communication connection between the receiver and receiver quickly, it is necessary for the receiver to quickly identify the system and parameters of channel coding only according to the unknown data received, so as to achieve the purpose of intelligent communication. This also requires the use of blind identification technology of channel coding. Channel coding blind recognition is a relatively professional research field. There are few published literature and mainly focus on the blind recognition of convolutional codes, which is a challenging research topic. This paper summarizes the research status of blind recognition technology of channel coding, introduces several blind recognition methods of convolutional codes, analyzes their advantages and disadvantages, and puts forward an improved algorithm and implementation scheme for their shortcomings. The simulation results show that, The improved algorithm improves the blind recognition performance of convolutional codes and achieves predetermined results. The main work of this paper is summarized as follows: The main research direction of this paper is blind recognition of convolutional codes. Firstly, by analyzing the linear characteristics of linear block codes in [NK] system, based on the linear features of block codes, the principle and method of blind recognition of linear block codes are established. The mathematical correspondence between linear block code and convolutional code is analyzed, and the blind recognition problem of several convolutional codes without error code is studied by using the blind recognition method of system linear block code, and then the blind recognition performance of convolutional code under error code condition is analyzed. Some possible ways of improvement are discussed. Finally, the paper summarizes and looks forward to the research method and train of thought of further solving the blind recognition problem of channel coding.
【学位授予单位】：中国科学技术大学
【学位级别】：硕士
【学位授予年份】：2009
【分类号】：TN911.2

【引证文献】