Research And Analysis On The Performance Of Jammer Localization Algorithm Based On Stochastic Geometry

The wide application of wireless networks in civil fields such as traffic detection,in telligent medical care and civil livelihood has driven the continuous upgrade of wireless communication technology.In the military field with strategic significance,wireless net work technology can be used for battlefield management,coordination of operations,rea l-time sharing of battlefield information and accomplishing tasks such as intelligence col lection.Military communications have higher security requirements than civilian comm unications.However,due to the openness of wireless signal transmission and broadcasti ng mechanism,wireless communication networks have been facing serious security prob lems,especially Jamming problems.Jamming attacks can lead to data loss,erroneous da ta transmission,and communication interruptions in the network,severely damaging co mmunication lines and causing system failures.The increasingly flexible programming i nterfaces of commodity devices allow attackers to easily launch jamming.While traditio nal anti-jamming techniques are mainly implemented by means of frequency hopping,s pread spectrum,and multiple antennas,jamming source localization techniques are of gr eat interest as they offer the opportunity to "remove" the jamming source from the physi cal layer.Some of the existing localization schemes require additional measurement equ ipment,while others fail to take full advantage of the distribution information of wireles s network nodes.In order to address these challenges,the research in this paper focuses on the follow ing tasks.This paper proposes an improved least-squares based jamming localization algorith m.To address the problem that existing interference source localization algorithms cann ot achieve low-cost localization,this paper uses a least-squares algorithm based on large-scale fading channels to determine the location of the jammer,and draws on the idea of stochastic geometry to model the network and achieve the estimation of the location of t he jammer.The scheme adopts the idea of non-ranging class localization,i.e.,it achieves the location estimation without involving additional measurement devices and relies onl y on the distance information provided by neighboring nodes,thus reducing the localizat ion cost.At the same time,the distribution of nodes can be fully utilized through networ k analysis with random geometric modeling,so the scheme alleviates the shortcomings o f traditional localization schemes to a certain extent.Extensive simulation results show t hat the improved least-squares-based localization jamming source scheme is very effecti ve in locating the attacker,and the localization accuracy is improved by about 35% over the existing scheme.For the problem of locating the interferer source in small-scale fading scenarios,an interferer source localization algorithm based on Nakagami fading channels is proposed in subsequent sections of this paper,and the performance of the network in terms of sig nal-to-noise ratio and coverage probability in the presence of interference is analyzed.Fi nally,the localization performance after the introduction of the small-scale fading chann el is evaluated through simulation experiments.Also,in order to compare different chan nel environments,the performance of the network in terms of signal-to-noise ratio,cove rage and localization accuracy under Rayleigh fading channel is also analyzed in this pa per.Extensive simulation results show that the interference source localization scheme c onsidering the small-scale fading channel is very effective in locating the attacker.