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Volume 45 Issue 2
Feb.  2023
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NING Xiaoyan, ZHAO Dongxu, ZHU Yunfei, WANG Zhenduo. Two-dimensional Frequency Hopping Communication System and Performance Analysis Based on Discrete Fractional Fourier Transform[J]. Journal of Electronics & Information Technology, 2023, 45(2): 497-504. doi: 10.11999/JEIT211338
Citation: NING Xiaoyan, ZHAO Dongxu, ZHU Yunfei, WANG Zhenduo. Two-dimensional Frequency Hopping Communication System and Performance Analysis Based on Discrete Fractional Fourier Transform[J]. Journal of Electronics & Information Technology, 2023, 45(2): 497-504. doi: 10.11999/JEIT211338

Two-dimensional Frequency Hopping Communication System and Performance Analysis Based on Discrete Fractional Fourier Transform

doi: 10.11999/JEIT211338
Funds:  The National Natural Science Foundation of China (62001138), The Natural Science Foundation of Heilongjiang Province (LH2021F009), China Postdoctoral Science Foundation (2020M670885)
  • Received Date: 2021-11-15
  • Accepted Date: 2022-07-14
  • Rev Recd Date: 2022-06-20
  • Available Online: 2022-07-19
  • Publish Date: 2023-02-07
  • Because of the advantages of strong anti-interference ability and low probability of interception, Frequency Hopping (FH) is widely used in military and civilian fields. In view of the increasingly mature means of detecting FH and the information is easy to be intercepted, by drawing on the Orthogonal Frequency Division Multiplexing (OFDM) system framework, a Fractional Fourier Transform Frequency Hopping with Variable Time Wide and Fixed Bandwidth (FrFT-FH-VTFB) system based on Discrete Fractional Fourier Transform (DFrFT) is proposed in this paper and a new system framework is designed. While realizing the covert transmission of information, the DFrFT is used to avoid the problem that the hopping speed is limited by the frequency synthesizer. The system uses two PN sequences to select Chirp signals with different time width and frequency to achieve multi-dimensional transformation of system parameters. In addition, this paper establishes the relevant mathematical model and derives the theoretical bit error rate of the system under white noise channel. The simulation results show that the system designed in this paper has better anti-fading performance, the power spectrum is submerged under noise and the time-frequency domain characteristics have no obvious periodic characteristics.
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