A STUDY OF SOME CODING PROBLEMS AND ERROR CONTROL TECHNIQUESFOR DATA COMMUNICATIONS

数据通信的一些编码问题及差错控制技术研究

• 批准号: 8813480
• 负责人: Shu Lin
• 金额: $ 14.04万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-02-01 至 1992-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8813480&HistoricalAwards=false
• 关键词: STUDY; SOME; CODING; PROBLEMS; ERROR

This research topic investigates several fundamental topics in coding theory as applied to reliable data communication. The major areas of study are: (1) codes with multi-level error- correcting capabilities, (2) weight distributions of linear block codes, (3) block coded modulation, and (4) coding techniques for error control. In the first area, codes are sought which can provide different levels of error protection for different parts of a message. An example of application is the broadcast channel where different receivers operate in different noise environments, hence requiring different levels of protection. The second research area is motivated by the need for simpler schemes to evaluate the error control performance of broader classes of codes. The third area addresses the problem of combined modulation and block coding to achieve highly reliable and bandwidth-efficient data communication systems. Similar techniques, but using trellis ( or convolutional) coding rather than block coding, have emerged as an important application in modern data systems ( especially for voice-band and satellite channels). The final area is the continued development of the idea of cascaded coding, which is a generalization of concatenated coding. This concept, in conjunction with the preceding topic, could lead the way to development of systems with extremely low error probability with a minimal increase in assigned channel bandwidth. In addition to suggesting specific solutions to current data transmission problems, this project is likely to lay the groundwork for future research in coding theory.

本研究课题探讨几个基本课题 应用于可靠数据通信的编码理论。的 研究的主要领域是：（1）具有多级错误的码- 校正能力，（2）线性块的权重分布 编码，（3）块编码调制，以及（4）用于 错误控制在第一个领域，所寻求的准则可以 为不同部件提供不同级别的错误保护 一个信息。应用的一个例子是广播频道 其中不同的接收器在不同的噪声中操作 环境，因此需要不同级别的保护。的 第二个研究领域的动机是需要更简单的计划 为了评估更广泛类别的错误控制性能， 代码.第三个领域涉及的问题是， 调制和分组编码，以实现高可靠性和 带宽高效的数据通信系统。类似 技术，但使用网格（或卷积）编码，而不是 比分组编码，已经成为一个重要的应用， 现代数据系统（特别是用于话音频带和卫星 渠道）。最后一个领域是继续发展 级联编码的思想，是 级联编码这一概念与 前面的主题，可以引导系统的发展， 具有极低的错误概率， 分配的信道带宽。除了建议具体 解决当前数据传输问题，该项目是 这可能会为未来的编码研究奠定基础 理论