A Range-Doppler Domain Approach for Random Frequency-Phase Coded Signal Against Interrupted Sampling Repeater Jamming

Interrupted sampling repeater jamming (ISRJ) can severely degrade the detection capability of linear frequency modulation (LFM) radars, due to its fast response and flexible modulation modes. To address the issue, this paper proposes a random inter-pulse frequency joint intra-pulse phase coding LFM...

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Vydané v:IEEE transactions on aerospace and electronic systems s. 1 - 20
Hlavní autori: Liu, Lipeng, Cao, Fei, Peng, Wenshen, Ju, Xin, He, Chuan
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: IEEE 2025
Predmet:
Accuracy
Ambiguity function (AF)
Codes
Couplings
Doppler effect
Encoding
interrupted sampling repeater jamming (ISRJ)
Jamming
multi-channel one-shot phase compensation
non -uniform sparse fourier transform (NUSFT)
Radar
random inter-pulse frequency joint intra-pulse phase coding LFM (RIF-PCLFM) signal
Repeaters
Signal processing algorithms
Signal to noise ratio
ISSN:0018-9251, 1557-9603
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Popis
Shrnutí:Interrupted sampling repeater jamming (ISRJ) can severely degrade the detection capability of linear frequency modulation (LFM) radars, due to its fast response and flexible modulation modes. To address the issue, this paper proposes a random inter-pulse frequency joint intra-pulse phase coding LFM waveform (RIF-PCLFM) and the corresponding method against ISRJ. The analytical expression of the ambiguity function (AF) is firstly derived. Based on this results, an excellent characteristic is revealed: the RIF-PCLFM signal inherits the high range resolution of the LFM signal while canceling the range-Doppler (RD) coupling effect. Thereby, we impose favorable constraints on the false targets generated by ISRJ, resulting in only a sparse deception effect rather than expansion or migration in the RD domain. This enables us to design a multi-channel one-shot phase compensation method for reconstructing, identifying, and suppressing false targets in the RD domain. Furthermore, to address the coherent processing challenge under inter-pulse phase nonlinearity, we propose an efficient non-uniform sparse Fourier transform (ENUSFT) algorithm with a decoupled inner-loop structure, which can well meet the real-time requirements of ISRJ suppression process. Multiple simulation results demonstrate that the proposed method exhibits outstanding detection and anti-jamming performance across various scenarios, with a processing efficiency reaching the millisecond level.
ISSN:0018-9251
1557-9603
DOI:10.1109/TAES.2025.3634077