基于DBF信噪比估计的数字阵列遥测接收灵敏度研究

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中图分类号：TP927 文献标识码：A 文章编号：2096-4706（2026）03-0021-05

Research on Telemetry Reception Sensitivity of Digital Array Based on DBF Signal-to-Noise Ratio Estimation

LU Changhai1，WANG Lei1，MAO Yongxin²， JIA Xinyu² （1.Team 42，Unit91550，Dalian 116023，China;2.Unit91445，Dalian 116043，China）

Abstract： Reception sensitivity isan important indicator characterizing the capabilityofa telemetry receiver to capture weak signals.For the link designandreceptionsensitivity index allcationof digital arraytelemetrysystems，this paper comprehensively evaluates thesensitivityindexof telemetryreceiving systems throughtheoreticalanalysiscombined withthe equivalentconversionofmeasuredtelemetrydemodulationlos，antenna gainandantennaquivalentnoise temperature.Inactual fieldtests，duetothe interferenceof surrounding environments，groundradiation，other RFmicrowaveradiation sources and otherfactors，tetestrsultsofwielesslinksesitivitydeviatesigificantlyfromtheoreticalvalues.Toaddressthisproblem，this paper proposes a SNR estimation method for left-right rotation I/Q recorded data based on DBF，and achieves accurate estimation of SNR parametersanddetectionand verificationofsystemsensitivitybyapplying the Welch spectrum estimationalgorithm to collected data.

Keywords： SNR estimation; telemetry reception sensitivity; digital array

0 引言

接收灵敏度是遥测系统的一个重要指标，表征遥测接收微弱信号的能力，即误码率满足一定条件下，接收机所能检测的最低信号电平 Simin[1-2] 。（剩余6003字）