·102·现代导航2024年基于共轭梯度法的空时抗干扰算法研究罗强1.2,牛曦辰3(1中国电子科技集团公司第二十研究所,西安710068;2陕西省组合与智能导航重点实验室,西安710068;3陕西交通职业技术学院,西安710018)摘要:由于卫星导航信号功率很小,所以卫星导航信号具有易受干扰的特点,目前卫星导航抗干扰算法主要用到的是协方差矩阵求逆的方法,比如空域和空时抗干扰算法,然而随着天线阵元数的增加和空时抽头数的增加,矩阵维数也随之增加,导致运算量的上升,而共轭梯度法可以避免高维矩阵求逆,且具有收敛快,计算量小的特点,因此基于共轭梯度法的求解空时抗干扰算法,并通过仿真分析证明所提方法的有效性。关键词:卫星导航;空时抗干扰算法;共轭梯度法;功率倒置算法中图分类号:TN953文献标志码:A文章编号:1674-7976-(2024)-02-102-05TimeDifferenceLocationMethodUsingTwoPlanesRealizedbySingle-BaseMidpointDFLUOQiang,NIUXichenAbstract:Sincethepowerofsatellitenavigationsignalsisverylow,satellitenavigationsignalsaresusceptibletointerference.Currently,satellitenavigationanti-interferencealgorithmsmainlyusethemethodofinvertingthecovariancematrix,suchasspace,space-timeandspace-frequencyanti-interferencealgorithms.However,asthenumberofantennaarrayelements,thenumberofspace-timetaps,andthefrequencypointsofthespace-frequencyalgorithmincrease,thematrixdimensionalsoincreases,resultinginanincreaseintheamountofcalculations.Theconjugategradientmethodcanavoidtheinversionofhigh-dimensionalmatrices.Ithasthecharacteristicsoffastconvergenceandsmallamountofcalculation.Therefore,thespace-timeanti-interferencealgorithmarestudiedbasedontheconjugategradientmethod,andtheeffectivenessoftheproposedmethodisprovedthroughsimulationanalysis.Keywords:SatlliteNavigation;Space-TimeAnti-JammingAlgorithm;ConjugateGradientMethod;SampleMatrixInversionAlgorithm极易受到有意或无意的外部电磁干扰,导致卫星定0引言卫星信号到达地面时信号强度只有-130dBm,收稿日期:2024-01-08。罗强(1996.10一),陕西礼泉人,硕士,工程师,主要研究方向为GNSS卫星导航、数理统计学及机器学习。位不准确或者不能定位。目前常用的卫星导航抗干扰算法是自适应调零算法[1-21,这类算法求解最优权值...