SBIR Phase I: Interference Mitigation for Broadband Wireless Backhaul Systems

该项目更广泛的影响/商业潜力是使无线行业运营商和设备提供商能够用负担得起的技术解决方案来满足持续爆炸性的社会/客户对数据访问的需求。该项目的预期技术和商业成果是具有主动干扰缓解能力和产品功能，包括显著提高服务质量、简化网络设备设计和安装，以及降低对天线和过滤器等许多组件的要求。这反过来将降低每条数据链路的总体成本，并降低系统的大小、重量和功率要求。预计用于无线回程应用的有源干扰消除系统每80兆赫链路的费用约为2 000美元。以这一成本价值，该技术可以应用于各种商业应用，包括视频监控、智能电网和移动数据。这项小型企业创新研究(SBIR)第一阶段项目为许多无线网络中具有挑战性的干扰问题提供了独特的解决方案。这个问题在无线回程系统未经许可的5 GHz范围的新兴市场上尤其麻烦。与传统的射频(RF)和数字干扰缓解或消除技术不同，所提出的干扰消除系统(ICS)通过使用模拟信号处理和电光组件来产生无与伦比的消除水平。ICS是在回程网络中实现高服务质量的关键方法。利用已经开发的原型，建议的系统配置将以典型的信号类型和组件进行演示。此外，作为现有机械延迟线的替代方案，将研究基于干涉的延迟线，以获得更快的调谐速度。在调查的基础上，对回程应用的产品设计进行商业化分析。该产品的预期关键性能参数可以在窄带(10 KHz)上提供最大80分贝的抵消，在宽带(80 MHz)上提供40分贝的同址干扰消除。

The broader impact/commercial potential of this project is to enable wireless industry carriers and equipment providers with an affordable technology solution to meet the continuing explosive societal/customer demands for data access. The expected technical and commercial outcome from the project is an active interference mitigation capability with product features including a significantly improved quality of service, simplified network equipment design and installation, and reduced requirements for many components such as antenna and filters. This in turn will reduce the overall cost per data link, as well as reducing the size, weight, and power requirements of the system. It is projected that the cost per 80 MHz link with the active interference cancellation system for the wireless backhaul application will be approximately $2,000. At this cost value, the technology can be implemented into a variety of commercial applications including video surveillance, smart grid, and mobile data.This Small Business Innovation Research (SBIR) Phase I project provides a unique solution to the challenging interference problem in many wireless networks. This problem is particularly troublesome in the emergent market of the unlicensed 5GHz range for wireless backhaul systems. Unlike conventional radio frequency (RF) and digital interference mitigation or cancelation techniques, the proposed interference cancellation system (ICS) generates unmatched levels of cancellation by using analog signal processing with electro-optic components. The ICS is the key approach that can enable high quality of service in backhaul networks. Taking advantage of the already developed prototype, the proposed system configuration will be demonstrated with representative signal types and components. In addition, as an alternative to the off-the-shelf mechanical delay line, an interferometric based delay line will be investigated for faster tuning speed. Based on the investigations, the product design for backhaul application will be analyzed for commercialization. The anticipated key performance parameters of the product could provide maximum of 80 dB of cancellation over narrowband (10kHz) and 40 dB over broadband (80MHz) for co-site interference.