Research Initiation: Robust Communication and Generalized Spread-Spectrum Systems

研究启动：鲁棒通信和广义扩频系统

• 批准号: 8804257
• 负责人: Brian Hughes
• 金额: $ 6万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-15 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8804257&HistoricalAwards=false
• 关键词: Research; Initiation; Robust; Communication; Generalized

The objective of the research is to establish basic design principles to achieve robust communication over channels corrupted by thermal noise and by unknown interfering signals of bounded power, using pseudo-random communication systems. This work will complement and extend current research on communication using error-control coding, interleaving and spread-spectrum modulation. Such systems are special cases of those considered in this research project. Two general issues are addressed. The first aims at establishing the potential coding gain offered by pseudo-random communication systems. This question will be addressed in the context of code-division multiple-access and interference suppression (anti-jamming) applications. A key aspect of this problem is to quantify the role of interleaving in robust systems. In the second part of this research, the principal investigator will introduce and examine the structure and performance of a new class of robust coding systems, called pseudo-random codes, which generalize coding systems with interleaving and spread-spectrum modulation. As in spread- spectrum these codes are driven by pseudo-random parameters; however, coding, interleaving and spectral spreading are performed simultaneously. Theoretical results show that within this family of codes are some that, in some situations, achieve coding gains much greater than those that can be achieved with spread-spectrum techniques for the same expended power, bandwidth and complexity.//

研究的目的是建立基本设计 通过信道实现稳健通信的原则 受到热噪声和未知干扰信号的破坏， 有界功率，使用伪随机通信系统。 这 这项工作将补充和扩展目前对通信的研究 使用差错控制编码、交织和扩频 调变 这些系统是所考虑的系统的特殊情况 in this research研究project项目. 两个一般性问题得到解决。 第一个目标是 建立由伪随机提供的潜在编码增益 通信系统。 这个问题将在 码分多址环境与干扰 抑制（抗干扰）应用。 其中一个关键方面是 问题是量化交织在鲁棒性中的作用。 系统. 在本研究的第二部分， 调查人员将介绍和检查结构， 性能的一类新的鲁棒编码系统，称为 伪随机码，它将编码系统推广为 交织和扩频调制。 就像在传播- 频谱这些码由伪随机参数驱动; 然而，编码、交织和频谱扩展 同时进行。 理论结果表明，在 在某些情况下，这一系列代码可以实现 编码增益远远大于那些可以实现与 对于相同的扩展功率、带宽的扩频技术 复杂性//