Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (8): 2857-2866.doi: 10.12305/j.issn.1001-506X.2024.08.33

• Communications and Networks • Previous Articles    

Design and performance analysis of LPD communication waveform based on FrFT-FH structure

Xiaoyan NING1, Yifei YANG1, Kaifeng GUO2, Zhenduo WANG1,*   

  1. 1. College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
    2. System Engineering Institute of China State Shipbuilding Corporation Limited, Beijing 100094, China
  • Received:2023-06-25 Online:2024-07-25 Published:2024-08-07
  • Contact: Zhenduo WANG

Abstract:

In order to solve the problem that the Chirp signal has obvious characteristics in fractional Fourier transform domain and the signal's period is easy to be detected, a low probability of detection (LPD) waveform construction method that can achieve multiple domain concealment is designed. The proposed method refers to fractional Fourier transform frequency hopping (FrFT-FH) architecture without changing the spread spectrum gain of Chirp signal. Through time width division and reorganization (TDR), the convergence property characteristic of Chirp signal in fractional Fourier transform domain and the periodic domain of the signal are reduced. The simulation results show that the proposed waveform which is preserving system's conmunication performance, achieves signal detecion probabilities below 0.2 in frequency detection, fractional Fourier transform domain detection, and periodic domains detection with the condition of signal-to-noise ratio of 10 dB. The proposed method addresses the limitaion of current LPD waveforms which are confined to concealment problem in a single feature domain, and meets the requirements for system in various feature domains.

Key words: ultiple domain concealment, low probability of detection (LPD), fractional Fourier transform-frequency hopping (FrFT-FH), time width division and reorganization (TDR)

CLC Number: 

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