Binary-Sequence Frequency Hopping Communication Method Based on Pseudo-Random Linear Frequency Modulation

Tang, Zhiqiang; Quan, Houde; Sun, Hairong; Pei-zhang, Cui

doi:10.1007/s12204-020-2250-8

Cited by 4 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, its frequency has a large error when the SNR is as low as -10 dB. In 2021, Fan Cai [12] proposed a method based on parity alternating channelized reception in the fractional order domain. This method is highly effective in improving the signal-to-noise ratio of the output signal and can better identify the LFM signal in a 0 dB SNR environment.…”

Section: Introductionmentioning

confidence: 99%

High-precision measurement of satellite-borne SAR signal bandwidth based on channelized waterfall diagrams

Liu,

Zhang,

Feng

et al. 2023

Third International Conference on Optics and Communication Technology (ICOCT 2023)

View full text Add to dashboard Cite

Spaceborne SAR has a vast scope of operation that is not restricted by national borders or airspace, so it has been extensively utilized in diverse fields. Due to its non-cooperation, it is difficult for the reconnaissance antenna to obtain the main lobe signal for parameter analysis and working mode identification of the SAR signal, especially when the spaceborne SAR imaging area is far from the location of the reconnaissance antenna. The reconnaissance receiving antenna can only receive a weak SAR signal with a low signal-to-noise ratio, resulting in a significant error in signal parameter measurement and making it unable to fulfill the analysis of its intended operation. Aiming to address the issue of significant measurement errors in spaceborne SAR signal bandwidth parameters under low signal-to-noise ratio conditions, a high-precision measurement method for spaceborne SAR signal bandwidth is proposed. This method is based on a channelized waterfall diagram, which involves accumulating the channelized signal twice to create the chart. The chirp signal on the waterfall chart is then extracted using an image processing technique to accurately measure the signal bandwidth. Additionally, scene simulation under low signal-to-noise ratio conditions is conducted. The simulation results show that even when the signal-to-noise ratio is as low as -10dB, the error in signal bandwidth measurement does not exceed 17%, indicating stable measurement accuracy.

show abstract

Section: Introductionmentioning

confidence: 99%

High-precision measurement of satellite-borne SAR signal bandwidth based on channelized waterfall diagrams

Liu,

Zhang,

Feng

et al. 2023

Third International Conference on Optics and Communication Technology (ICOCT 2023)

View full text Add to dashboard Cite

show abstract

“…However, the antijamming ability is naturally stronger. Aiming at the poor antijamming ability of dual channels, linear frequency modulated (LFM) wave and pseudorandom code were modulated in DSFH RF signal to enhance the system's antijamming ability in [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Research on Stochastic Resonance Detection Method for Periodic Signals under Low SNR and α-Stable Noise

Liu³

et al. 2021

Mobile Information Systems

View full text Add to dashboard Cite

In Dual Sequence Frequency Hopping (DSFH) communication mode, aiming at improving the detection performance to weak signal under low signal-to-noise ratio (SNR) conditions, stochastic resonance (SR) detection method is proposed. First, the α-stable distribution is used as the impulsive noise model and the influence of α value on the properties of α-stable noise is analyzed. Second, the transmitting and receiving signal model of DSFH communication system is introduced. The SR method is used to detect DSFH signal. In order to analyze the output signal, the fractional Fokker–Planck equation (FFPE) is established, and a new simplified solution method based on sampling decision time is proposed to solve the time-varying fractional differential equation. Base on the theoretical solution of FFPE, a binary hypothesis test statistic is constructed to quantify the signal detection probability and false alarm probability, and the detection performance is analyzed. Finally, simulation experiments verify the theoretical conclusions. The minimum effective SNR for SR detection is obtained, and it is about −20 dB, which provides a theoretical basis for the application of SR in the DSFH communication system.

show abstract

A High Speed Frequency Hopping Capture Synchronization Method

Liu

Han

2022

2022 International Communication Engineering and Cloud Computing Conference (CECCC)

View full text Add to dashboard Cite

Binary-Sequence Frequency Hopping Communication Method Based on Pseudo-Random Linear Frequency Modulation

Cited by 4 publications

References 6 publications

High-precision measurement of satellite-borne SAR signal bandwidth based on channelized waterfall diagrams

High-precision measurement of satellite-borne SAR signal bandwidth based on channelized waterfall diagrams

Research on Stochastic Resonance Detection Method for Periodic Signals under Low SNR and α-Stable Noise

A High Speed Frequency Hopping Capture Synchronization Method

Contact Info

Product

Resources

About