强激光与粒子束2025，Vol.37Issue(11)：70-76,7.DOI:10.11884/HPLPB202537.250118
无人机数据链单音干扰效应规律研究
Study on the law of single-tone interference effect in unmanned aerial vehicle data links
摘要
Abstract
[Background]Unmanned aerial vehicle(UAV)data links operating in battlefield environments are highly susceptible to electromagnetic interference(EMI),frequently causing frame synchronization failures.direct sequence spread spectrum(DSSS)systems,while offering inherent interference resistance,remain vulnerable to intentional EMI attacks through front-door coupling pathways.[Purpose]This study aims to establish loss-of-lock threshold models for DSSS-based UAV data links under two critical interference scenarios:in-band single-source single-tone and dual-source dual-tone EMI.The research further seeks to experimentally validate these models.[Methods]Through rigorous EMI mechanism analysis with emphasis on front-door coupling effects,the theoretical threshold models were developed for both interference scenarios.Test validation employed EMI injection testing on an operational UAV data link platform.Controlled variables included working signal power,interference frequencies,and interference power.The interference thresholds were obtained from the tests.[Results]The test loss-of-lock thresholds demonstrated strong alignment with theoretical predictions across both interference scenarios.For single-source interference,the thresholds exhibited positive correlation with working signal power,and the absolute value of the frequency offset.Under dual-source interference,the thresholds of interference 1 showed inverse correlation with the power of interference 2.[Conclusions]The validated threshold models provide a theoretical foundation for EMI sensitivity assessment and test design in UAV data link systems.Key findings indicate:(1)The closer the interference frequency is to the carrier frequency of the working signal,the worse the anti-interference ability of the data link is.(2)Increasing the power of the working signal can improve the anti-interference ability of the data link.(3)Front-door coupling is an important way for EMI to enter the receiver in tactical scenarios.These findings could provide optimized EMI protection for the next generation of UAV data links.关键词
无人机/数据链/直接序列扩频/单音干扰/失锁阈值Key words
unmanned aerial vehicle/data link/direct sequence spread spectrum/single-tone interference/loss-of-lock threshold分类
信息技术与安全科学引用本文复制引用
张晓璐,陈亚洲,赵敏,李延松,王耀北..无人机数据链单音干扰效应规律研究[J].强激光与粒子束,2025,37(11):70-76,7.基金项目
国家自然科学基金项目(62301605) （62301605）
