简介：Anewtechnologyoflightninglocationisdescribed,whichisbasedondetectingthestateofpolarization(SOP)fluctuationofthelaserlightintheopticgroundwire(OPGW).Comparedwiththeconventionallightninglocationmethod,thenewmethodismoreaccurate,morestable,andcheaper.TheoriesofStokesparametersandPoincaresphereareintroducedtoanalyzetheSOPatthelightningstrikepoint.ItcanbeconcludedthatalthoughtheinitialpointsofSOPonthePoincarespherearerandom,theSOPfluctuationgeneratedbylightningstrikecanstillbeaccuratelyidentifiedbydetectingthevelocityofpolarizationmotion.Anewalgorithmtoquantifythevelocityisalsointroduced.

简介：Acombinationoflight-emittingdiode(LED)identificationandatime-divisionmultiplexingschemeisproposedinthisLetterforindoorlocation-basedservice.Withthescheme,thearrangementofwhiteLEDlampsandthestructureofadataframearedesignedtorealizehigh-accuracyindoorpositioningandlocation-basedpayloaddatatransmissionsimultaneously.Theresultsoftheexperimentdemonstratethattheindoorpositioningaccuracyis10cmand2Mb/sdatatransmissionwithhighsignalqualityisrealized.