基于时域插值的小脉宽信号高精度测频方法

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中图分类号：TN911.7；TP273.4 文献标识码：A 文章编号：2096-4706（2025）07-0009-05

Abstract： Aiming at the problem of frequency measurement accuracy of smallpulse width signal in low Signal-toNoise Ratio environment，this paper proposes the FFT high-precision frequency measurement method based on time domain interpolationandcobsenalgorit.roughsiulatioaalysis，teetsofdifeentintepotionmethods，eetial to-NoiseRatio，anddifferentFFTpointsonfrequencymeasurementaccuracyarestudied.Theresultsshow thatcomparedwith thetraditionalJacobsenalgorithm，thismethodfurtherimproves thefrequencymeasurementaccuracyandexhibitsstrongantinoiseperformance.Inaddition，the methodisverifedontheXilinxPGAplatform，whichproves itsengineringfeasibilityand accuracy.Duetothesmallamountofcalculation，the methodiseasytorealizereal-time procesingandhasa good prospectof engineringapplication.Theresearchresults provideanefectivesolution for thefrequency measurementofsmallpulse width signals in digital receivers.

Keywords： small pulse width; FFT frequency measurement; Jacobsen; time domain interpolation

0 引言

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