Smart Active Antenna Arrays with Optical Processing

具有光学处理功能的智能有源天线阵列

• 批准号: 9979355
• 负责人: Zoya Popovic
• 金额: $ 25万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-10-01 至 2002-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9979355&HistoricalAwards=false
• 关键词: Smart; Active; Antenna; Arrays; Optical

9979355PopovicThe development of smart active antenna array front ends with optical/digital processing back ends is proposed. The objective is to demonstrate that:Smart (adaptive) antennas improve adverse interference effects in wirelesscommunication systems;Active smart antenna arrays increase radiated power with reduced cost and power consumption, increase dynamic range, increase reliability and reduce cost, with built-in angle-of arrival detection;Nonlinear optical components provide a simpler, potentially low-cost alternative todigital signal processing and can be easily integrated with active microwave andmillimeter-wave arrays.Interfering signals can be both spatially and temporally varying, causing interference to depend on time as well as on the physical location of the users and surrounding area. To mitigate interference problems, smart antennas create a spatial division multiple access network. Currently, there are not many commercially used smart antenna wireless systems, but several companies have used smart antennas to steer nulls and reduce interference, with increase range and capacity for the same transmitted power, with additional reduced maintenance cost. Smart antennas are also attractive to providers because they provide flexibility as systems grow. The approach taken in this proposal involves a new type of adaptivity for antenna arrays, through a new front end architecture, aided by unique capabilities of nonlinear optical processing. Specific arguments are that: (1) introducing adaptation at the analog front end eases the burden on the signal processing and adaptation becomes faster and more energy efficient with no cost increase (and possible decrease); and (2) nonlinear holographic optical processing can be efficiently used to perform part of the signal processing, with reduction in power consumption, size and cost..This proposal focuses on systems with: (1) a transmit/receive active lens antenna array front end; (2) resonant electro-optic conversion; and (3) nonlinear active optical interconnects. In order to validate the goals of cost, size and power consumption reductions, a benchmark DSP adaptive processor (4) is proposed.Interdisciplinary expertise in microwave/millimeter wave active antenna arrays, and nonlinear optics is needed, along with knowledge of the interference properties in a wireless channel and an understanding of the most practical adaptive algorithms. Students involved in this work will gain a broad knowledge base while working on challenging fundamental research problems. This is a collaborative effort with Qualcomm (a world leader in wireless communications), the French Thomson CSF (one of the leaders in optically controlled antenna beam-forming), and the Netherlands Foundation for RadioAstronomy (a scientific institution with strong interests in adaptive arrays).***

9979355 Popovic智能有源天线阵列前端与光学/数字处理后端的发展。目的是证明：聪明（自适应）天线改善了无线通信系统中的不利干扰影响;有源智能天线阵列增加了辐射功率，降低了成本和功耗，增加了动态范围，增加了可靠性并降低了成本，具有内置的到达角检测;非线性光学元件提供了一种更简单，可能是数字信号处理的低成本替代品，并且可以很容易地与有源微波和毫米波集成，干扰信号可以在空间上和时间上都是变化的，导致干扰取决于时间以及用户和周围区域的物理位置。为了减轻干扰问题，智能天线创建空分多址网络。目前，商业上使用的智能天线无线系统并不多，但是几家公司已经使用智能天线来操纵零点和减少干扰，对于相同的发射功率增加了范围和容量，另外降低了维护成本。智能天线对供应商也很有吸引力，因为随着系统的增长，它们提供了灵活性。该提案中采用的方法涉及一种新型的天线阵列自适应性，通过一种新的前端架构，由非线性光学处理的独特能力的帮助。具体的论点是：（1）在模拟前端引入自适应减轻了信号处理的负担，并且自适应变得更快和更节能，而不增加成本（并且可能降低成本）;以及（2）非线性全息光学处理可以有效地用于执行部分信号处理，同时降低功耗、尺寸和成本。该提议集中于具有以下各项的系统：（1）发射/接收有源透镜天线阵列前端;（2）谐振电光转换;以及（3）非线性有源光学互连。为了验证降低成本、尺寸和功耗的目标，提出了基准DSP自适应处理器（4）。需要微波/毫米波有源天线阵列和非线性光学的跨学科专业知识，沿着无线信道中干扰特性的知识和最实用的自适应算法的理解。参与这项工作的学生将获得广泛的知识基础，同时致力于具有挑战性的基础研究问题。这是高通公司（无线通信领域的全球领导者）、法国Thomson CSF（光控天线波束形成领域的领导者之一）和荷兰射电天文学基金会（对自适应阵列有浓厚兴趣的科学机构）的合作成果。