Results 271 to 279 of about 5,050 (279)
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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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Low profile and anti-jam GPS array
2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2013This paper presents an anti-jam GPS array. The antenna is comprised of 4 small size radiating cavities filled with two stacked patches and a series of dielectric substrates and a foam layer. The main features of the antenna are low profile shape and low inter-element coupling. The antenna design is compatible with high impedance surface (HIS) insertion,
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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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An Intelligent Anti-jamming Frequency Hopping System
2010 First International Conference on Pervasive Computing, Signal Processing and Applications, 2010This paper proposes an integrated intelligent anti-jamming scheme for frequency hopping (FH) system based on the modern signal processing, including the algorithms for jamming recognition and jamming suppression. Without increasing the bandwidth and hopping rate, the proposed scheme can improve the robustness of the FH system against various jamming.
Lin-Na Jia, Xiang-Yi Meng, Ran Tao
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Design of Anti-jamming Antenna for the GPS Receiver
2007 8th International Conference on Electronic Measurement and Instruments, 2007Since GPS signal is very weak when arriving at the ground, even smaller than the background noise of space. This makes GPS receiver's capability of resisting repressive interference poor. By using power inversion algorithm, a GPS receiver antenna is designed.
Wu Pengfei, Zhang Qiu-yu, Chen Si
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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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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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