·114·现代导航2024年简化Volterra级数的S模式信号失真恢复宫峰勋，刘焘（中国民航大学电子信息与自动化学院，天津300300）摘要：机场场面多点定位利用S模式信号到达时间差实现目标定位。针对S模式信号易受接收系统内部非线性影响和机场场面复杂电磁干扰的问题，研究S模式信号失真恢复方法。根据S模式信号频谱特征和接收基站弱非线性记忆系统特征简化Volterra级数，降低计算量的同时满足Volterra级数关键核函数对S模式信号非线性失真表示能力，得到S模式信号失真恢复模型。仿真结果表明：3阶简化Volterra级数模型恢复15dB和0dBS模式信号前导脉冲的失真前波形，误差仅有2.23%和12.59%，且模型在典型运用环境下满足一定的适用性、抗干扰性和稳定性，为S模式信号到达时间戳的准确提取提供基础。关键词：多点定位；S模式信号；到达时间；简化Volterra级数；非线性失真中图分类号：TN851文献标识码：A文章编号：1674-7976-(2024)-02-114-08Mode-SSignalDistortionRecoveryBasedonSimplifiedVolterraSeriesGONGFengxun,LIUTaoAbstract:Themulti-pointlocationoftheairportsceneusesthearrivaltimedfferenceofthemode-ssignaltorealizethetargetlocation.Aimingattheproblemthatthemode-ssignalissusceptibletotheinternalnonlinearinfluenceofthereceivingsystemandthecomplexelectromagneticinterferenceoftheairport,themethodofrestoringthedistortionofthemode-ssignalisstudied.Accordingtothespectrumcharacteristicsofmode-ssignalandthecharacteristicsoftheweaknonlinearmemorysystemofthereceivingbasestation,theVolterraseriesissimplified,andtheabilityofthekeykernelfunctionofVolterraseriestorepresentthenonlineardistortionofmode-ssignalisreduced.Thedistortionrecoverymodelofmode-ssignalisobtained.Thesimulationresultsshowthatthe3-ordersimplifiedVolterraseriesmodelcanrecoverthepre-distortedwaveformsoftheleadingpulsesof15dBand0dBmode-ssignals,andtheerrorsareonly2.23%and12.59%.Themodelmeetscertainapplicability,anti-interferenceandstabilityintypicalapplicationenvironment,whichprovidesabasisforaccurateextractionofarrivaltimestamps.Keywords:Multilateration;Mode-SSignal;TimeofArrival;SimplifyVolterraSeries;NonlinearDistortion目标位置[1-2]。但接收基站内部易受到谐波失真、互0引言多点定位系...
