A USRP-based GNSS and interference signal generator and playback system

Proceedings of the 2012 IEEE/ION Position, Location and Navigation Symposium Pub Date : 2012-04-23 DOI:10.1109/PLANS.2012.6236916

Ruihui Di, S. Peng, S. Taylor, Y. Morton

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引用次数: 17

Abstract

This paper presents a low cost, portable, and flexible GNSS signal and interference signal generator based on a general purpose software radio front end, the Universal Serial Radio Peripheral (USRP) family of devices. We paired a USRP-N210 mother board with appropriate RFX daughter boards to generate all GNSS signals controlled by a personal computer. The source of the signal can be pre-recorded digital samples obtained from specific RF front end or arbitrary samples generated using MATLAB programs. An adjustable low noise signal amplifier mounted between the USRP output and the transmitting antenna was used to control the transmitted power of the signal. A spectrum analyzer was used to directly monitor the transmitted signal. The NovAtel receiver was used to verify the performance of this signal generator and playback system. The received GNSS data after transmitting via USRP-N210 and the original GNSS data before transmitting are processed by NovAtel receiver and software receiver programs respectively for performance evaluation purposes. Some comparisons had been done to demonstrate the accuracy of the playback system.

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基于usrp的GNSS和干扰信号发生器和回放系统

本文提出了一种低成本、便携、灵活的GNSS信号和干扰信号发生器，该发生器基于通用软件无线电前端，即通用串行无线电外设(USRP)系列设备。我们将USRP-N210母板与适当的RFX子板配对，以产生由个人计算机控制的所有GNSS信号。信号源可以是预先记录的从特定射频前端获得的数字样本，也可以是使用MATLAB程序生成的任意样本。在USRP输出端和发射天线之间安装了一个可调的低噪声信号放大器来控制信号的发射功率。利用频谱分析仪对发射信号进行直接监测。用NovAtel接收机验证了该信号发生器和重放系统的性能。通过USRP-N210发送后接收到的GNSS数据和发送前的原始GNSS数据分别由NovAtel接收机和软件接收机程序进行性能评估。为了证明回放系统的准确性，已经做了一些比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 2012 IEEE/ION Position, Location and Navigation Symposium

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