Adaptive chaotic frequency hopping

Mansour, Ahmed E.; Saad, Walid; Ramly, Salwa H. El

doi:10.1109/icces.2015.7393068

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…The optimal frequency hopping rate was investigated in [15] to resist tracking jamming, considering detection expense and detection errors. In [16], an adaptive chaotic frequency hopping scheme was proposed to enhance anti-jamming capabilities. Antijamming techniques in the power domain are regarded as the most direct and effective anti-jamming schemes and have been widely used [8].…”

Section: Related Workmentioning

confidence: 99%

Learning-Based Multi-Domain Anti-Jamming Communication with Unknown Information

Li,

Wang,

Gao

2023

Electronics

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Due to the open nature of the wireless channel, wireless networks are vulnerable to jamming attacks. In this paper, we try to solve the anti-jamming problem caused by smart jammers, which can adaptively adjust the jamming channel and the jamming power. The interaction between the legitimate transmitter and the jammers is modeled as a non-zero-sum game. Considering that it is challenging for the transmitter and the jammers to acquire each other’s information, we propose two anti-jamming communication schemes based on the Deep Q-Network (DQN) algorithm and hierarchical learning (HL) algorithm to solve the non-zero-sum game. Specifically, the DQN-based scheme aims to solve the anti-jamming strategies in the frequency domain and the power domain directly, while the HL-based scheme tries to find the optimal mixed strategies for the Nash equilibrium. Simulation results are presented to validate the effectiveness of the proposed schemes. It is shown that the HL-based scheme has a better convergence performance and the DQN-based scheme has a higher converged utility of the transmitter. In the case of a single jammer, the DQN-based scheme achieves 80% of the transmitter’s utility of the no-jamming case, while the HL-based scheme achieves 63%.

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Section: Related Workmentioning

confidence: 99%

Learning-Based Multi-Domain Anti-Jamming Communication with Unknown Information

Li,

Wang,

Gao

2023

Electronics

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“…The real random noise radar transmits the noise waveform and spectrum with high range resolution [ 23 , 24 ], but faces many challenges in engineering, including reference signal storage, low signal-to-noise ratios (SNRs), and transmitter–receiver isolation [ 25 ]. Consequently, much research is focused on the topic of chaos [ 26 , 27 , 28 , 29 , 30 ]. Chaotic nonlinear dynamics can be considered a physical phenomenon that bridges the regular evolution of systems with random evolution [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Design and Processing of a Novel Chaos-Based Stepped Frequency Synthesized Wideband Radar Signal

Zeng

Chang

Fan

et al. 2018

Sensors

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The linear stepped frequency and linear frequency shift keying (FSK) signal has been widely used in radar systems. However, such linear modulation signals suffer from the range–Doppler coupling that degrades radar multi-target resolution. Moreover, the fixed frequency-hopping or frequency-coded sequence can be easily predicted by the interception receiver in the electronic countermeasures (ECM) environments, which limits radar anti-jamming performance. In addition, the single FSK modulation reduces the radar low probability of intercept (LPI) performance, for it cannot achieve a large time–bandwidth product. To solve such problems, we propose a novel chaos-based stepped frequency (CSF) synthesized wideband signal in this paper. The signal introduces chaotic frequency hopping between the coherent stepped frequency pulses, and adopts a chaotic frequency shift keying (CFSK) and phase shift keying (PSK) composited coded modulation in a subpulse, called CSF-CFSK/PSK. Correspondingly, the processing method for the signal has been proposed. According to our theoretical analyses and the simulations, the proposed signal and processing method achieve better multi-target resolution and LPI performance. Furthermore, flexible modulation is able to increase the robustness against identification of the interception receiver and improve the anti-jamming performance of the radar.

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“…On the basis of chaotic signals with noise-like and unpredictable features, the integration of FH technique and chaos theory is proposed to improve the security and the system performance [4][5][6]. In [5,6], some constructions of aperiodic FH sequence sets are proposed based on chaos theory to enhance robustness, but with a few frequency collision resulting in multi-access interference (MAI) in FHMA systems.…”

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confidence: 99%

Chaos theory‐based NHZ‐FH sequence set for quasi‐synchronous FHMA system

Zeng

Liu

2017

Electron. lett.

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Uniformity, good Hamming-correlation and long period are critical requirements for frequency-hopping (FH) sequence set. A new class of no-hit zone FH (NHZ-FH) sequence set is designed based on chaotic nonlinear map to meet above three demands. Some properties of the proposed sequence set and its performance for frequencyhopping-multiple-access (FHMA) system are investigated. The results show that the proposed NHZ-FH sequence set can offer more robustness to eavesdropper and lower BER for quasi-synchronous FHMA system in comparison with other traditional FH sequence sets.

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Adaptive chaotic frequency hopping

Cited by 7 publications

References 7 publications

Learning-Based Multi-Domain Anti-Jamming Communication with Unknown Information

Learning-Based Multi-Domain Anti-Jamming Communication with Unknown Information

Design and Processing of a Novel Chaos-Based Stepped Frequency Synthesized Wideband Radar Signal

Chaos theory‐based NHZ‐FH sequence set for quasi‐synchronous FHMA system

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