Results 261 to 270 of about 5,156 (280)
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Naval radar anti-jamming technique
Journal of the Institution of Electrical Engineers - Part IIIA: Radiolocation, 1946The use of radar in the 1939-45 War was quickly followed by the development of methods of "jamming" radar equipments in order to reduce their operational value. Specimen photographs are shown in the paper of the appearances of various types of jamming signal on radar displays.
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Anti-Jamming Techniques for GPS Receivers
2001Abstract : The fundamental objective of this research project is to improve the GPS receiver performance when subjected to strong nonstationary interference. The techniques applied and proposed to achieve this objective rely on the estimation of both time-frequency and spatial signatures of the jammers.
Yimin Zhang +3 more
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A self-recovery scheme in anti-jamming communications
1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings, 2002By exploiting the spatial diversity among different signals, anti-jamming communications can be accomplishing using antenna arrays. In this paper, we discuss the self-recovery problem for antenna array wireless systems after the communication link is broken due to abrupt environmental changes.
Hui Liu, Murat Torlak, Guanghan Xu
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Anti-jamming Performance Analysis of FRFT-OFDM
2010 First International Conference on Pervasive Computing, Signal Processing and Applications, 2010The OFDM system based on the fractional Fourier transform (FRFT-OFDM) is robust against fast-fading channel. However, the performance of anti-jamming is not analyzed. In this paper, the anti-jamming performance of the FRFT-OFDM system under multitone jamming (MTJ) and linear frequency modulated (LFM) jamming is evaluated.
Qian Yang, Jia Ni, Ran Tao
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Research on Anti-Jamming RF-EAS System
Advanced Materials Research, 2014This thesis takes AIO (All-In-One) type of RF-EAS systems as the object, to study how to improve its anti-interference performance. Interference noise in the article is divided into two types, which are steady noise and transient noise. According to the characteristics of different interference noises, their impacts on all aspects of the system are ...
Wei Li, Yan Bin Zhang, Ji Cai Deng
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The Integrative Application of Anti-Jamming Technology for Radar
2010 2nd International Workshop on Intelligent Systems and Applications, 2010This paper analyzed some primary techniques of anti-jamming technology for radar. Simulation results show the merit of each method. And it proposed a new idea that combines some typical anti-jamming techniques together. It was a more effective way of the integrative anti-jamming technology.
Ming Zhou, Qinglei Du, Mingjiu Lv
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Active Anti-jamming Solutions in CRNs
2015Cognitive radio nodes are motivated to perform jamming attacks, if the illegal gains exceed the payment due to the attacking cost and the loss from the resulting punishment. In this chapter, we present active anti-jamming solutions in CRNs, based on reciprocity principles, social norms and reinforcement learning techniques.
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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 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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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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