MRI: Development of a Matrix Channel Measurement System

MRI：矩阵通道测量系统的开发

• 批准号: 0215990
• 负责人: Steven Ellingson
• 金额: $ 24.99万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-10-01 至 2004-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0215990&HistoricalAwards=false
• 关键词: MRI; Development; Matrix; Channel; Measurement

AbstractA matrix channel is the set of NT NR impulse responses (subchannels) that completely characterize the propagation between NT I transmit antennas and NR I receive antennas. The Ohio State University ElectroScience Laboratory (ESL) will develop a matrix channel measurement system (MCMS), consisting of a mobile multichannel transmitter (MCT) and a portable multichannel receiver (MCR) capable of any form of modulation with bandwidth up to 40 MHz at any frequency between 250 MHz and 6 GHz. The MCT will consist of 4 independent, coherent channels. Each transmit channel will consist of an arbitrary waveform generator and an upconverter. The MCR will consist of 16 channels, with each channel consisting of a downconverter/digitizer, 75 ms capture at 40 MHz bandwidth (proportionally longer for smaller bandwidths), on-the-fly data processing, and long-term storage of results. Both the MCT and MCR will be battery-powered and built into transit cases suitable for two-person carry to allow measurements anywhere, including indoors, outdoors, and from vehicles.The MCMS will be employed in continuing ESL research programs including: (1) Measurements of capacity in matrix channels, (2) Development and evaluation of open loop forward link array processing techniques for frequency division duplex (FDD) systems, (3) Refinement of angle-of-arrival (AOA) estimation techniques for beamforming and mobile radio geolocation, and (4) Evaluation of interference mitigation techniques for GPS receivers. In each case, the superior tuning range, bandwidth, capture time, and portability of the MCMS will greatly enhance the quality of data relative to that obtained from previous systems developed by ESL and others. For example, in topic 1, the MCMS will be used to obtain improved and more thorough measurements of matrix channels to support development of the next generation of communications technologies, such as BLAST, that exploit antenna arrays to dramatically increase spectral efficiency. Of particular interest is learning under what conditions matrix channel systems significantly outperform vector (NT = 1) channel methods, and how to design antenna arrays (element geometry and polarization) to optimize this performance. The MCMS will possess unprecedented flexibility by virtue of its modular, software-defined architecture, and thus will be of great value for other research efforts as well.Despite the urgent need, no system with comparable features exists commercially, nor can such a system be assembled from off-the-shelf equipment at a reasonable cost. Instead, the project team will design the MCMS from the bottom up, bringing to bear its extensive previous experience in developing similar systems. To ensure the success of this project, ESL will partner with Aeroflex Lintek - a world-renowned developer of custom RF test equipment - to codevelop the MCMS. In this partnership, ESL will be responsible for design concept, requirements, proof-of-concept, and prototyping of hardware and software. Aeroflex Lintek will participate in the design effort and will be responsible for systems engineering and development of the final system. Aeroflex Lintek will perform this work for a small fraction of it's anticipated costs in return for the opportunity to develop, produce, and market a new generation RE test equipment based on technology developed from this project.

Abstracta矩阵通道是NT NR脉冲响应（亚渠道）的集合，它完全表征了NT I传输天线和NR之间接收天线的传播。俄亥俄州立大学的电科学实验室（ESL）将开发一个矩阵通道测量系统（MCMS），该系统由移动多通道发射机（MCT）和可移植的多通道接收器（MCR）组成，具有任何形式的调制形式，带有带宽的任何形式，在250 MHz和6 GHz之间的任何频率高达40 MHz。 MCT将由4个独立的连贯通道组成。每个发射通道将由任意波形生成器和上换通道组成。 MCR将由16个通道组成，每个通道由下调/数字化器组成，在40 MHz带宽处捕获75 ms捕获（对于较小的带宽比例更长），即时数据处理以及结果的长期存储。 MCT和MCR都将由电池供电并内置到适用于两人携带的运输案件中，以允许在任何地方进行测量，包括室内，室外和车辆。MCMS将用于继续ESL研究计划中，包括：（1）矩阵频道中的容量测量值：（2）矩阵频道中的循环链路链路链接系统的开发和评估（3）频率分隔（FD）的频率分隔（F频段），以下（F）。边缘和移动无线电地理位置的到达角度（AOA）估计技术，以及（4）评估GPS接收器的干扰缓解技术。在每种情况下，MCMS的上级调谐范围，带宽，捕获时间和可移植性将大大提高数据相对于从ESL和其他人开发的先前系统获得的数据质量。例如，在主题1中，将使用MCM来获得对基质通道的改进和更彻底的测量，以支持开发下一代通信技术（例如BLAST），以利用天线阵列可显着提高光谱效率。特别有趣的是在什么条件下学习矩阵通道系统显着优于向量（NT = 1）通道方法，以及如何设计天线阵列（元素几何和极化）以优化此性能。 MCMS将凭借其模块化，软件定义的架构具有前所未有的灵活性，因此对于其他研究工作也将具有很大的价值。尽管迫切需要，没有可比较特征的系统在商业上也不存在，也无法以合理的成本从现成的设备中组装出这种系统。取而代之的是，项目团队将从自下而上设计MCM，从而带来其以前在开发类似系统方面的丰富经验。为了确保该项目的成功，ESL将与世界著名的自定义RF测试设备开发人员Aeroflex Lintek合作，以编码MCMS。在这种合作伙伴关系中，ESL将负责硬件和软件的设计概念，要求，概念验证和原型制作。 Aeroflex Lintek将参加设计工作，并将负责最终系统的系统工程和开发。 Aeroflex Lintek将以一小部分预期的成本进行这项工作，以便有机会根据该项目开发的技术开发，生产和销售新一代的重新测试设备。