多像素光子计数器的水下弱光信号检测算法

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关键词：无线光通信；多像素光子计数器；微弱信号检测；广义安斯科姆根变换；反卷积滤波技术；光功率中图分类号：TN929.1-34 文献标识码：A 文章编号：1004-373X（2025）20-0001-09

Underwater weak light signal detection algorithm based on MPPC

HAODong1，LITian¹，LIBili，ZHAOPeirong²，XUEYajie³ （1.NavalEqpentDeprtment，eijingo5，hina;2.Xi'anIstituteofreisionchineryXi’anO6，ina; .SchoolofCommunicatinandforationEngineering，Xi’anUiversityofostsandelecommuicatios，Xi’ana）

Abstract：Whenamulti-pixel photoncounter（MPPC）isused todetect weak signals inunderwaterlong-distanceoptical wirelesscommunication （OWC），thereareseriouspulseacumulationefectandPoissonnoiseduetoitsoperationinGeiger mode，resulting indificultcountingandreduced measurementaccuracy.Tosolvethisproblem，the mathematical modelingof discretephotonsignalsreceivedbyMPPCisconducted，adeconvolutionuniongeneralizedAnscombetransform（DUGAT） detectionalgorithmisproposed.Thedeconvolutionfiltering technologyisused toprocesstheweak signaltoreducethe stacking efectandconvergethepulsewidth.ThegeneralizedAnscombetransform（GAT）isusedtoconvertthenoisesignalof the Poisson + Gaussian（P+G）distributionintoGaussan variable，which isequivalent toanadditive Gaussiannoisesignal.The detectionalgorithmbasedonharddecisionisused tocountthesignal.Bysetinguptheexperimentenvironment，thecollected experimentaldataisprocessdbymeansof theproposedalgorithm.Theresultsshowthatwhenthewaterqualityatenuation coefficient is 0.114m-1 and the signal error rate is 3.8×10-3 ，the average number of photons per pulse of the received signal is approximately11，andcomparedwithtraditionalARandMLdetectionalgorithms，thesensitivityoftheproposedalgorithmcan be improved by about 8.66 dB and 9.55 dB，respectively.When the water quality atenuation coefficient is 0.142m-1 ，the average numberof photonsperpulseof thereceivedsignal isapproximately15，andcomparedwithtraditionalARandMLdetection algorithms，thesensivityoftheproposedalgorithmcanbeimprovedbyabout7.83dBand9.26dB，respectively.Itdemostrates thattheproposedalgorithmcanefectivelyimprovethecommunicationdistanceof theunderwater wirelessopticalcommunication （UOWC） system.

Keywords：optical wirelesscommunication；multi-pixel photoncounter;weak signal detection；generalizedAnscombe transform;deconvolution filtering technology;optical power

0 引言

激光具有调制频率高、方向性好以及抗干扰能力强等优点，可以满足高速无线通信的现实需求，因此在大气或水下通信中，无线光通信（OWC）成为一种可行的选项。（剩余12265字）