Results 271 to 280 of about 5,156 (280)
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Metricwave Radar Anti-jamming Technology
2019Apart from radar signals, there are a great deal of civil television, modulation frequency radio and communication signal in crowded metricwave frequency bands, which are usually adjacent to radar operation frequency, with very high power and incessancy, therefore metricwaver radar should firstly be characteristized with anti-jamming capability in ...
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Adaptive Algorithm for Anti-Jamming in Broadband Communication
Applied Mechanics and Materials, 2014This paper presents a method to suppress narrowband interference in the direct sequence spread spectrum communication based frequency domain adaptive algorithm. The method determines the interference threshold by N-sigma algorithm and calculates the cut-off condition by separating the signal.
Nai Ping Cheng, Jian Hua Cui
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Design and implementation of Beidou anti-jamming antenna
2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI), 2017This paper introduces the realization method of Beidou anti-jamming antenna hardware and software, theory analysis and MATLAB simulation of antenna array and adaptive algorithm. The space time joint anti-jamming algorithm based on the linear constraint minimum variance criterion is adopted as the core of the anti-jamming processor.
Yan Shuangshan, Quan Jichao, Hu Xuelong
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Anti-Jamming Process for Reply Extraction of MSSR
2006 6th International Conference on ITS Telecommunications, 2006This paper is about MSSR reply decoding and confidence bits. A novelty method is presented in this paper which can extract the reply code efficiently on highly high density reply occasion. The results of theoretical analysis and practical system-test have showed that this method can get very high detection probability and very low falsehood probability
Li Yubai, Jiang Rui, Yang Xiao-fei
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Incorporation of Anti-Jamming Techniques in a GPS Receiver
2008 International Conference on Signal Processing, Communications and Networking, 2008GPS guidance uses low power signals from satellites which are 11000 NMI away. The satellite transmitter power is modest nearly 10 W orders of magnitude. Neither satellite nor receivers have the luxury of very high antenna gain since both entities have significant field of view requirements. These factors result in a very low power density incident on a
Bimal Kumar Sarkar +3 more
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A novel cognitive anti-jamming stochastic game
2017 Cognitive Communications for Aerospace Applications Workshop (CCAA), 2017This paper proposes a new cognitive anti-jamming stochastic game model for multi-agent environments in which each wideband autonomous cognitive radio (WACR) attempts to predict and evade the transmissions of other radios as well as a dynamic jammer signal. The cognitive framework is divided into two operations: sensing and transmission.
Sudharman K. Jayaweera, Mohamed A. Aref
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Anti-jamming Strategies: A Stochastic Game Approach
2015Due to their shared and open-access design, wireless networks are very vulnerable to many malicious attacks, ranging from passive eavesdropping to active interfering. In this paper, using stochastic game modeling we study anti-jamming strategies and their effectiveness against two types of interference attacks: (i) a random jammer, where the malicious ...
Wade Trappe, Andrey Garnaev
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A convergence theory for a class of anti-jamming strategies
Journal of Optimization Theory and Applications, 1977A convergence theory for a class of anti-jamming strategies for nonlinear programming algorithms is presented. This theory generalizes previous results in this area by Zoutendijk, Topkis and Veinott, Mangasarian, and others; it is applicable to algorithms in which the anti-jamming parameter is fixed at some positive value as well as to algorithms in ...
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Spread Spectrum-Based Anti-jamming Techniques
2015In this chapter, we first introduce spread spectrum-based anti-jamming techniques in Sect. 2.1. We then investigate the anti-jamming transmissions based on frequency hopping in Sect. 2.2, and present DSSS-based anti-jamming systems in Sect. 2.3. We discuss the challenges of jammers in cognitive radio networks in Sect. 2.4, and summarize in Sect. 2.5.
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