实现一个高灵敏度的全球导航卫星系统接收器在一个系统上芯片的现场可编程门阵列平台上
Marc Majoral1, Javier Arribas1, Carles Fernández-Prades1
1Centre Tecnològic de Telecomunicacions de Catalunya (CTTC/CERCA), Parc Mediterrani de la Tecnologia, Building B4, Av. Carl Friedrich Gauss 7, 08860 Castelldefels, Spain.
Sensors (Basel, Switzerland)
|March 13, 2024
概括
这项研究介绍了一种负担得起的,高灵敏度的全球导航卫星系统 (GNSS) 接收器,能够跟踪弱的利略信号. 新的System-on-Chip Field-Programmable Gate Array设计能够在具有挑战性的低信号对噪声环境中提供强大的性能.
科学领域:
- 电气工程 电气工程
- 卫星导航系统 卫星导航系统
- 信号处理 信号处理
背景情况:
- 传统的全球导航卫星系统 (GNSS) 接收器在信号采集方面很弱,特别是在具有高信号衰减的具有挑战性的环境中.
- 在GNSS信号处理算法的进步对于提高接收器性能和扩大应用领域至关重要.
- 软件定义无线电 (SDR) 概念与硬件加速的整合为开发更高效,更适应性的GNSS接收器提供了有希望的途径.
研究的目的:
- 设计和实施一个实惠的,实时的高灵敏度 (HS) GNSS接收器.
- 特别是为了能够捕获和跟踪微弱的利略E1b/c信号.
- 为在低信号对噪声环境中研究先进的GNSS信号处理算法提供一个平台.
主要方法:
- 使用了系统在芯片上的可编程门阵列 (SoC-FPGA) 技术,将SDR灵活性与FPGA硬件处理合并.
- 在SoC-FPGA架构内开发了一个模块化的GNSS基带处理引擎.
- 在各种信号强度条件下,用实时利略信号测试了接收器.
主要成果:
- 证明了接收器能够获取和跟踪微弱的利略E1b/c信号的能力.
- 取得成功的导航解决方案,即使在载波与噪声密度比率 (C/N0) 低至20dB-Hz.
- 与传统的基于处理器的设计相比,展示了增强的功率效率.
结论:
- 开发的HS GNSS接收器是一个可行的,低成本的解决方案,用于研究先进的信号处理.
- SoC-FPGA架构为嵌入式软件定义接收器提供了一种节能且可适应的平台.
- 这项工作有助于在具有挑战性的环境中开发,测试和验证实验性GNSS信号处理技术.
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