Propagation and Capacity Studies for Multi-Polarized MIMO Communication Systems

多极化 MIMO 通信系统的传播和容量研究

• 批准号: 0300130
• 负责人: Ramakrishna Janaswamy
• 金额: $ 30万
• 依托单位: University of Massachusetts Amherst
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-01 至 2007-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0300130&HistoricalAwards=false
• 关键词: Propagation; Capacity; Studies; Multi; Polarized

0300130JanaswamyFuture wireless systems, providing high data-rate services with limited spectrum, will increase capacity by exploiting additional degrees of freedom provided by the spatial dimension. Examples of such systems are multiple-input multiple-output (MIMO) systems, where multiple antennas are employed at each end to scale the number of degrees of freedom. Further degrees of freedom can be obtained through employing various electric and magnetic field components of the electromagnetic wave. Assuming that the same configuration is employed at both the transmitter and receiver, information theoretic results for independent fading demonstrate that the system capacity scales linearly with the product of the number of antennas and the number of field components per antenna employed. This has led system designers to consider systems with a vast number of antennas where possible. However, as these systems push rapidly towards implementation, it is important to be able to analyze and design such systems for realistic propagation environments, where the amount of independence is inherently limited. Thus, under this project, the PIs will: (1) develop stochastic propagation models that include depolarization and multiple scattering of waves (2) study capacity limitations arising from element correlation and mutual coupling that results from restricting antennas to a fixed volume and realistic environment, and (3) design and analyze robust single-user and multi-user communication techniques that exploit various forms of channel state information in these environments.The technical merit of this project is significant both in fundamental advances in the individual areas of the PIs and also in the close connection of such. The modeling techniques for MIMO systems will represent significant advances in electromagnetic modeling for this important new environment. The capacity analyses will introduce new techniques and mathematical devices that will prove of general use to the community. The techniques of design and analysis of communication systems based on the derived electromagnetic models represent a new approach to robust communication system design. Just as importantly, however, is how the connection of the two areas of the PIs furthers the goals of the project; in particular, the communications research helps define the parameters of the electromagnetic model that will have a significant impact on system design and analysis, and the electromagnetic models drive the techniques and tools required to design and analyze MIMO systems. This promising technical merit is substantiated in this proposal by the description of the proposed and recent work of the PIs - both individually and in collaboration.The broader impact of this project will be significant in a number of ways. First, the models and techniques developed in this research will be used widely by researchers and designers of MIMO systems. In particular, the development of such models and techniques by this multidisciplinary team will guarantee both the accuracy of such and that the results are in a form that can serve the research community in the analysis and design of algorithms. Second, this project will continue the team's successful program of undergraduate research, which has sent a number of University of Massachusetts undergraduates to top graduate programs around the country, and supports two PIs with a sincere dedication to undergraduate teaching. Finally, this project will further the strong collaboration of the PIs across the boundary that separates electromagnetics from communication theory, and it will further the understanding that integrated academic research is not only needed across layers in the typical networking model but also within the physical layer itself.

未来的无线系统以有限的频谱提供高数据速率服务，将通过利用空间维度提供的额外自由度来增加容量。这种系统的示例是多输入多输出（MIMO）系统，其中在每一端采用多个天线来缩放自由度的数量。通过采用电磁波的各种电场和磁场分量，可以获得更多的自由度。假设在发射机和接收机处采用相同的配置，独立衰落的信息理论结果表明，系统容量与天线数量和每个天线的场分量数量的乘积成线性关系。这使得系统设计人员在可能的情况下考虑具有大量天线的系统。然而，随着这些系统的快速实现，重要的是能够分析和设计这样的系统，为现实的传播环境，其中的独立性是固有的限制。因此，在该项目下，主要研究者将：（1）开发包括波的去极化和多次散射的随机传播模型（2）研究由元件相关性和互耦合引起的容量限制，所述元件相关性和互耦合是由将天线限制到固定体积和现实环境引起的，（3）设计和分析了鲁棒的单用户和多用户在这些环境中利用各种形式的信道状态信息的用户通信技术。该项目的技术价值在个人通信的根本进步方面都是重要的。的领域的PI，也在密切联系。MIMO系统的建模技术将代表这一重要新环境的电磁建模的重大进展。容量分析将引入新的技术和数学工具，这些技术和数学工具将被证明对社会通用。基于所导出的电磁模型的通信系统设计和分析技术代表了一种新的通信系统鲁棒设计方法。然而，同样重要的是，PI的两个领域的连接如何进一步实现项目的目标;特别是，通信研究有助于定义电磁模型的参数，这些参数将对系统设计和分析产生重大影响，电磁模型驱动设计和分析MIMO系统所需的技术和工具。本建议书描述了项目负责人的拟议工作和最近的工作-包括单独工作和合作工作-证实了这一有希望的技术优点。首先，本研究所建立的模型和技术将被MIMO系统的研究人员和设计人员广泛使用。特别是，这种模型和技术的发展，由这个多学科的团队将保证这两个的准确性和结果的形式，可以服务于研究界的分析和算法的设计。 其次，该项目将继续该团队成功的本科研究计划，该计划已将马萨诸塞州大学的一些本科生送往全国各地的顶级研究生课程，并支持两名PI真诚致力于本科教学。最后，该项目将进一步加强PI之间的密切合作，跨越将电磁学与通信理论分开的边界，并将进一步理解集成学术研究不仅需要在典型的网络模型中跨层进行，而且还需要在物理层本身进行。