CAREER: The Design of Resource-Efficient Communications Systems by Combining Decision Feedback with Error-Control Coding

职业：通过将决策反馈与错误控制编码相结合来设计资源高效的通信系统

• 批准号: 0093114
• 负责人: Tommy Guess
• 金额: $ 30万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-06-01 至 2006-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0093114&HistoricalAwards=false
• 关键词: CAREER; Design; Resource; Efficient; Communications

The ubiquity of communications technology is becoming more evidentevery day. As the number of customers grows within each market, alongwith their demand for higher and higher data rates, the need to use available resources such as power and bandwidth as efficiently as possible becomes paramount. Typically a communications system that is operating near theoretical limits requires a receiver whose computational complexityis prohibitively large. To reduce complexity, it is common to linearizea portion of the receiver but this can severely reduce system performancerelative to theoretical potential. However, there is a class of nonlinearreceivers known as decision-feedback receivers whose complexity is essentially no more than that of linear receivers but whose performance is often much closer to that of optimal receivers. This research explores the decision-feedback receiver structure as a practical means of realizing resource-efficient communications systems. The research is also integrated into educational activities at all student levels. Aspects of the research are purposefully introduced to undergraduate students in the classroom,during summer work programs, and through senior-level thesis advising. This prepares them both technically and motivationally to enter industryor to pursue further studies in graduate school. Graduate students areprovided an environment conducive to doing quality research in the exciting field of communications, whether they choose careers in industry or academia.The technical aspects of the research involve three components. First, it is determined, at least in principle, how to combine a decision-feedback receiver with error-control coding for a variety of important communications channels. Then, within these decision-feedback frameworks analytical relationships between available resources and system requirements are derived, and resource-efficient systems are designed. Lastly, the transition is made from theoretical random codes to actual encoders and decoders that are simulated in software. Together these investigations provide communications systems that are highly efficient in regard to their conservation of resources, yet with low enough complexity to be amenable to implementation.

通信技术的普遍性正变得越来越明显每一天。随着每个市场中客户数量的增长，以及他们对越来越高的数据速率的需求，尽可能有效地使用可用资源（如电源和带宽）的需求变得至关重要。典型地，在理论极限附近工作的通信系统需要计算复杂度非常大的接收机。为了降低复杂性，通常对接收机的一部分进行线性化，但这会严重降低系统性能（相对于理论潜力）。然而，有一类非线性接收机被称为决策反馈接收机，其复杂性基本上不超过线性接收机，但其性能往往更接近于最佳接收机。 本研究探讨了决策反馈接收机结构作为实现资源有效的通信系统的一种实用手段。 这项研究还被纳入各级学生的教育活动。研究的各个方面有目的地介绍给本科生在课堂上，在暑期工作计划，并通过高级论文咨询。这使他们在技术上和动力上都做好了进入工业界或在研究生院继续深造的准备。研究生提供了一个环境，有利于做高质量的研究，在令人兴奋的通信领域，无论他们选择在工业界或学术界的职业生涯。首先，至少在原理上确定如何将判决反馈接收机联合收割机与用于各种重要通信信道的差错控制编码相结合。然后，在这些决策反馈框架的分析可用资源和系统需求之间的关系，并设计资源高效的系统。最后，从理论上的随机码过渡到软件模拟的实际编码器和解码器。 这些研究一起提供了通信系统，这些系统在资源保护方面非常有效，但复杂性足够低，易于实施。