• Title/Summary/Keyword: reactive jamming

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Performance Analysis on The Reactive Repeater Jamming Techniques Against an RCIED Using Mobile Devices (모바일 단말을 이용한 RCIED에 대한 repeater 방식의 반응 재밍 기법 성능 분석)

  • Kim, Yo-Han;Kim, Dong-Gyu;Kim, Hyoung-Nam
    • Journal of the Institute of Electronics and Information Engineers
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    • v.52 no.12
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    • pp.55-63
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    • 2015
  • Recently, terroristic threats using a radio controlled improvised explosive device (RCIED) that is remotely controlled and exploded have been increased around the world. In order to prevent the explosion of an RCIED, jamming techniques that interrupt an RCIED receiver can be used, so that the receiver can not demodulate the trigger code. Conventional jamming technique is a type of active barrage jamming that always emits the noise jamming signal for all the frequency band. However, it needs large power consumption and thus is limited in operation time for a vehicle. In order to overcome the shortage of the active barrage jamming, reactive jamming technique has drawn attention. In reactive jamming, all the frequency band is firstly scanned, and then if any trigger signal exists, one emits the jamming signal to the corresponding frequency band. Therefore, the reactive jamming is superior to the active barrage jamming in terms of power efficiency. However, a reactive jammer emits a jamming signal only after the trigger signal is intercepted, which means that the jamming signal may be late for interrupting an RCIED receiver. In this sense, it is needed to evaluate a delay in an RCIED receiver. To achieve this, we analyze the reaction time and present the simulation result for jamming performance of reactive jamming against an RCIED using mobile devices.

Iterative Channel Estimation Algorithm for Anti-jamming in MIMO Communication Systems (MIMO 통신 시스템에서 항재밍을 위한 반복적인 채널 추정 알고리즘)

  • Jung, Jun Hee;Hwang, Yu Min;Cha, Kyung Hyun;Lee, Jae Seang;Shin, Yoan;Kim, Jin Young
    • Journal of Satellite, Information and Communications
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    • v.11 no.3
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    • pp.32-36
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    • 2016
  • In wireless communication systems, jamming attack is a critical threat. Especially, reactive jamming can jam when the sender and receiver are communicating, which can maximize the attack efficiency of jamming. In this paper, we use the property of multi-input multi-output (MIMO) technology to achieve jamming resilient orthogonal frequency-division multiplexing (OFDM) communications. In particular, we use MIMO interference cancellation to remove the jamming signals strategically. We first investigate the reactive jamming attack model and their impacts on the MIMO-OFDM systems. We then present an iterative channel estimation algorithm that exploits MIMO interference cancellation. Our simulations show various anti-jamming methods and demonstrate the efficiency of our proposed algorithm under the reactive jamming attack.

Anti-Reactive Jamming Technology Based on Jamming Utilization

  • Xin Liu;Mingcong Zeng;Yarong Liu;Mei Wang;Xiyu Song
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.17 no.10
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    • pp.2883-2902
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    • 2023
  • Since the existing anti-jamming methods, including intelligent methods, have difficulty against high-speed reactive jamming, we studied a new methodology for jamming utilization instead of avoiding jamming. Different from the existing jamming utilization techniques that harvest energy from the jamming signal as a power supply, our proposed method can take the jamming signal as a favorable factor for frequency detection. Specifically, we design an intelligent differential frequency hopping communication framework (IDFH), which contains two stages of training and communication. We first adopt supervised learning to get the jamming rule during the training stage when the synchronizing sequence is sent. And then, we utilize the jamming rule to improve the frequency detection during the communication stage when the real payload is sent. Simulation results show that the proposed method successfully combated high-speed reactive jamming with different parameters. And the communication performance increases as the power of the jamming signal increase, hence the jamming signal can help users communicate in a low signal-to-noise ratio (SNR) environment.