基于开源模拟与接收平台的GPS欺骗信号关键参数分析

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关键词：GPS欺骗信号；时间延迟；位置距离差；信号功率；开源模拟平台中图分类号： 文献标志码： A

Key parameters analysis of GPS spoofing signals based on open-source simulation and reception platforms

SONG Zhiyuan，XU Lu，PENG Lei，JIANG Yukun，ZHANG Yijia （School of Information Science and Engineering，Zhejiang Sci-Tech University， Hangzhou 310018， Zhejiang，China）

Abstract： GPS spoofing signals have garnered significant attention due to their security threats to navigation systems and potential applications.Existing researches typically rely on expensive hardware simulators and dedicated receivers，limiting the reproducibility and scalability. The open-source GPSSDR-SIM signal simulator and the GNSS-SDR reception platform are employed to design a flexible and reproducible experimental scheme，investigating the effects of time delay，positional distance difference，and signal power on receiver response.Experimental results indicate that when the time delay exceeds 600ns ，the receiver fails to achieve successful positioning，rendering the spoofing signal largely ineffective；when the positional distance difference reaches 500m ，the receiver’s positioning error extends to 4000m ，causing spoofing failure；when the signal power drops below -8dB ，the positioning result remains within 20m of the real signal，making it difficult for the spoofing signal to interfere with normal positioning.This study demonstrates the potential of open-source experimental platforms in GPS spoofing signal research and provides critical support for navigation system security assessments and the development of anti-spoofing interference technologies.

Key words：GPS spoofing signal;time delay；positional distance difference；signal power；opensource simulation platform

0 引言

全球导航卫星系统1（GPS）是现代定位、导航与授时2-3的重要技术基础，应用于各种领域，如海上航行活动[4]、精准农业实施[5]、车辆自动驾驶、地震灾害监测移动蜂窝网络8以及智慧数字城市等。（剩余10667字）