CIF: Small: Exploring the Limits of Interference Networks under Practical Constraints

随着无线设备的数量及其在我们生活中的流行度的增加，并且随着无线基础设施从微小区发展到微微小区甚至毫微微小区，干扰主导的操作机制变得越来越重要，并且其管理变得越来越关键。干扰对齐是无线通信理论中令人兴奋的最新发展，它解决了以下基本问题：干扰其基本思想是协调网络中的传输，使干扰源重叠和集中，而不是侵扰整个信号空间，从而在每个接收器处打开干净的信号空间，并允许比以前认为可能的更大的吞吐量。然而，干扰对准还需要在工程知识的当前状态下不切实际的条件。其中包括对全局信道状态信息的要求，以及一种称为带宽扩展的现象，这种现象与观测的分辨率和必须“弯曲”以重叠干扰的空间的几何形状有关。部分由于这些问题，干扰对齐对无线通信的实际影响仍然是一个非常感兴趣的问题。建议的活动通过以下方式解决这个问题：（1）研究可以减少信道状态信息需求的方法;（2）研究可以减少带宽扩展和延迟的方法;以及（3）探索干扰对齐可以产生最积极影响的实际应用。该项目有可能对各种无线通信设备和网络的长期前景产生重大影响，包括蜂窝、毫微微蜂窝、未授权频段和车载网络。

As the number of wireless devices and their prevalence in our lives increases, and as the wireless infrastructures progress from micro-cells to pico-cells and even femto-cells, the interference dominated regime of operation becomes ever more important, and its management ever more critical, for the wireless applications of tomorrow.Interference alignment is an exciting recent development in wireless communication theory that addresses the fundamental problem of interference. The basic idea is to coordinate transmissions in a network so that interfering sources will overlap and concentrate instead of infesting the entire signal space, thus opening up clean signal space at each receiver and allowing a much larger throughput than previously thought possible. However, interference alignment also requires conditions that, in the current state of engineering knowledge, are impractical. Among them are the requirement of global channel state information, and a phenomenon known as bandwidth expansion that has to do with the resolution of observations and the geometry of spaces which must be "bent" to overlap the interference.Due in part to these issues, the practical impact of interference alignment on wireless communication remains a question of intense interest. The proposed activity addresses this question via (1) investigating methods that can reduce the requirement of channel state information; (2) investigating methods that can reduce bandwidth expansion and delay; and (3) exploring practical applications where interference alignment can have the most positive impact. This project has the potential to significantly impact the long-term prospects of a wide array of wireless communication devices and networks, including cellular, femto-cells, unlicensed bands, and vehicular networks.