FPGA-based software defined radio technologies for GNSS receiver design

用于 GNSS 接收器设计的基于 FPGA 的软件定义无线电技术

• 批准号: 501060-2016
• 负责人: Bisnath, Sunil
• 金额: $ 1.68万
• 依托单位: York University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618983
• 关键词: FPGA; based; software; defined; radio

The York University and COM DEV team has previously worked together on an NSERC Engage grant to develop a software defined radio (SDR) spaceborne Global Navigation Satellite System (GNSS) receiver. The current application follows-on by proposing the development of a prototype SDR GNSS receiver capable of tracking GNSS signals reflected from the Earth's surface and to distinguish variations in soil moisture content. COM DEV sees the significant potential of a future nanosatellite / microsatellite mission carrying such a commercialized payload for low-cost, near-real-time, regional or global near-surface soil moisture content determination, and the benefits for a host of users, including climate scientist, farmers, and policy-makers.The primary scientific issue is the ability to remotely sense near-surface soil moisture variations with reflected GNSS signals. Given the complexity of this problem, the goal will be to only distinguish differences in signal returns for different soil moisture content, rather than to make calibrated estimates.The specific research problems are 1) identiying the specifications and components for such a GNSS reflectometry system, including: antennas, RD front-end, GNSS receiver components, and measurement processing algorithms; 2) designing the FPGA-based SDR GNSS reflectometry receiver; and 3) testing and tuning the developed system.The potential value of the resulting prototype GNSS reflectometry receiver for soil moisture content could be a commercializable space product for COM DEV to sell domestically and for the export market. The York University partnership with COM DEV offers the potential to develop a family of new spaceborne satellite navigation products, as well as services.

约克大学和COM DEV团队此前曾在NSERC Engage资助下合作开发软件定义无线电（SDR）星载全球导航卫星系统（GNSS）接收器。目前的申请接着提出开发一种能够跟踪从地球表面反射的全球导航卫星系统信号并区分土壤含水量变化的软件无线电全球导航卫星系统接收器原型。COM DEV认为，未来的纳卫星/微卫星使命携带这种商业化的有效载荷，用于低成本，近实时，区域或全球近地表土壤水分含量测定的巨大潜力，以及对包括气候科学家，农民和决策者在内的许多用户的好处，主要的科学问题是利用反射的GNSS信号遥感近地表土壤水分变化的能力。鉴于这一问题的复杂性，我们的目标将是仅仅区分不同土壤含水量的信号返回的差异，而不是进行校准估计。具体的研究问题是：1）确定这种GNSS反射测量系统的规格和组件，包括：天线、RD前端、GNSS接收机组件和测量处理算法; 2）设计基于FPGA的SDR GNSS反射计接收器; 3）测试和调整所开发的系统。由此产生的用于土壤水分含量的原型GNSS反射计接收器的潜在价值可以是COM DEV在国内销售和出口市场的可商业化的空间产品。约克大学与COM DEV的伙伴关系提供了开发一系列新的星载卫星导航产品和服务的潜力。