CIF: Medium: Interference Alignment and the Rate-Reliability Tradeoff of Wireless Networks

CIF：中：无线网络的干扰调整和速率可靠性权衡

• 批准号: 0963925
• 负责人: Hamid Jafarkhani
• 金额: $ 82.51万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-10-01 至 2015-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0963925&HistoricalAwards=false
• 关键词: CIF; Medium; Interference; Alignment; Rate

Modern society is increasingly relying on wireless networks. Spectrum is the most valuable resource in a wireless network. How to share this limited resource among different users is one of the main challenges. When different users share the same spectrum, their signals cause interference to each other. Therefore, the most distinctive feature of wireless networks is the phenomenon of interference. In this research, we place special emphasis on practical considerations to ultimately find new ? realistic ? methods to deal with interference.A recent development is the idea of interference alignment which has shown that the capacity of wireless networks may be significantly higher than previously believed. Since higher rates invariably come at the cost of lower reliability, the emerging capacity results present only half the picture. This research is motivated by the need to complete this picture by evaluating the benefits of interference alignment schemes on the performance of wireless networks when both rate and reliability are of concern. The research follows three main thrusts. First, we examine the rate-reliability tradeoff of interference alignment schemes from the traditional coding perspective which places emphasis on low decoding complexity, usually at the cost of a restricted notion of optimality. Second, we examine the rate-reliability tradeoff of interference alignment schemes in the Shannon framework which allows strong definitions of optimality, usually at the cost of unbounded delay and complexity. These two thrusts are the stepping stones to the final thrust to reconcile the findings from the two distinct perspectives and use the collective insights to develop new physical layer schemes that can operate at the frontier of the rate-reliability tradeoff.

现代社会越来越依赖无线网络。频谱是无线网络中最有价值的资源。如何在不同用户之间共享这种有限的资源是主要挑战之一。当不同用户共享相同频谱时，他们的信号会相互干扰。因此，无线网络最显着的特点就是干扰现象。在这项研究中，我们特别强调实际考虑，以最终找到新的？实际的 ？最近的发展是干扰对齐的想法，它表明无线网络的容量可能比以前认为的要高得多。由于更高的速率总是以较低的可靠性为代价，因此新兴的容量结果只展示了一半的情况。这项研究的动机是，当速率和可靠性都受到关注时，需要通过评估干扰对齐方案对无线网络性能的好处来完成这一图景。该研究遵循三个主要目标。首先，我们从传统编码的角度研究干扰对齐方案的速率-可靠性权衡，传统编码的重点是低解码复杂性，通常以受限的最优性概念为代价。其次，我们研究了香农框架中干扰对齐方案的速率与可靠性权衡，该框架允许对最优性进行强有力的定义，通常以无限制的延迟和复杂性为代价。这两个主旨是最终主旨的垫脚石，以协调两个不同角度的研究结果，并利用集体见解来开发可以在速率可靠性权衡前沿运行的新物理层方案。