Frequency Hopping Signals Tracking and Sorting Based on Dynamic Programming Modulated Wideband Converters

Abstract

Most of the earlier tracking and network sorting approaches with a high sampling rate for frequency hopping (FH) signals did not adapt to the wideband system during their implementation, whereas the sub-Nyquist based algorithms cannot satisfy the real-time requirement for dealing with the rapid change of sparsity. It is important to improve the compressed sensing (CS) methods for tracking and sorting wideband FH signals. In this paper, a dynamic programming modulated wideband converters (MWC) scheme is proposed. First, considering the wide gap of FH signals, an improved power estimation method is proposed to track the support set in the time domain. Second, to sort multiple signals more effectively, a feedback control algorithm based on dynamic programming is proposed. In the proposed method, the total sampling rate is decreased significantly, and multiple FH signals are separated rapidly without recovery based on the results of tracking and comparative power. Simulations show that the proposed method can track and sort FH signals efficiently and more practically than previous methods.

Design of anti‐jamming decision‐making for cognitive radar

“…In order to verify the effectiveness of the model and algorithm, the attacker's strategy in this section adopts the invariable interference strategy. MC-learning updates iterations with Equation ( 18) after the whole episode, while Sarsa and Q-learning update iterations with Equation (19) and Equation (20), respectively, when time changes in episode. The end of the iteration is based on whether the action-value function Q converges, and the total reward will be stable when Q converges.…”

“…On the other hand, the progress of radar anti‐jamming technology will also stimulate the innovation of radar jamming technology. For example, when the radar adopts anti‐jamming technologies such as frequency hopping [16], frequency agility [17], polarisation change [18] etc., the jammer needs to adopt jamming technologies such as frequency tracking [19], polarisation matching [20], waveform recognition [21] etc. to increase the jamming effect.…”

A Fast Estimation Algorithm for Parameters of Multiple Frequency-Hopping Signals Based on Compressed Spectrum Sensing and Maximum Likelihood

“…However, constant-frequency RF signals are very susceptible to interference from the complex surrounding electromagnetic environment and to eavesdropping by third parties [1,2]. In this case, frequency-hopping signals have gradually replaced constant-frequency RF signals due to their strong anti-interference capability and good confidentiality and are widely used for military communications and remote control [3][4][5][6][7]. Since the introduction of FH technology in the military, research on jamming, counter jamming, counter sabotage and sabotage for FH technology has never stopped [8].…”

Correction: Lei, Z., et al. Frequency Hopping Signals Tracking and Sorting Based on Dynamic Programming Modulated Wideband Converters. Appl. Sci. 2019, 9, 2906

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We, the authors, wish to make the following corrections to our paper [1]. We found that the first author's name of the 'Reference [27]' [2] had been omitted in our paper.

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