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。如何在不同的用户之间共享这些有限的资源是主要的挑战之一。当不同的用户共享相同的频谱时，他们的信号会相互干扰。因此，无线网络最显著的特征就是干扰现象。在这项研究中，我们特别强调实际的考虑，最终找到新的？现实的？处理干扰的方法最近的发展是干扰对准的思想，其已经表明无线网络的容量可能比以前认为的要高得多。由于更高的费率总是以更低的可靠性为代价，因此，新出现的容量结果只反映了一半情况。本研究的动机是需要完成这幅图，通过评估的好处，干扰对齐方案的无线网络的性能时，速率和可靠性的关注。这项研究遵循三个主要方向。首先，我们从传统的编码角度研究了干扰对齐方案的速率可靠性权衡，该编码强调低解码复杂度，通常以受限的最优概念为代价。其次，我们研究的速率可靠性权衡的干扰对齐计划的香农框架，允许强定义的最优性，通常在无限的延迟和复杂性的成本。这两个推力是最终推力的垫脚石，以协调两个不同视角的发现，并使用集体见解来开发新的物理层方案，这些方案可以在速率-可靠性权衡的前沿运行。