A Truncated Matched Filter Method for Interrupted Sampling Repeater Jamming Suppression Based on Jamming Reconstruction
Abstract
:1. Introduction
2. Signal Model
2.1. Signal Model of LFM Radar
2.2. Mechanism of ISRJ
3. Truncated Matched Filter for ISRJ Suppression
3.1. Truncated Matched Filter
3.2. Extraction and Reconstruction of Jamming Slice
Algorithm 1: Truncated Matched Filter Method for jamming slice extraction. |
Input: The max-peak function , the transmitting cycle time T, echo signal Output: The reconstructed jamming signal
|
4. Simulation
4.1. Interference Suppression Based on TMF
4.2. Monte-Carlo Simulations and Results
- (i)
- Under the three jamming suppression methods, the probability of target detection will improve with the increase of SNR and JSR. The reason is that, when SNR and JSR rise, the distinction between jamming and true target signals becomes increasingly clear, which makes it easier to extract interference-free segments for MaxTF and EFDBP methods. In the TMF method, higher SNR and JSR mean higher jamming-noise ratio (JNR) and better recovery of jamming signals, which improves interference suppression.
- (ii)
- The TMF method shows better performance in lower SNR and JSR compared with other methods. The other two methods rely on the extraction of interference-free segments, whereas their extraction performance in the low SNR and JSR regimes is poor. In addition, the TMF method is to recover jamming signals directly. When the SNR and JSR are low, the JNR is still high enough to ensure the recovery of jamming signals, resulting in a greater interference suppression effect.
- (iii)
- For the same jamming type, the performance of the three jamming suppression methods increases with the SNR raising. For the same jamming suppression method, the performance under the three jamming types show the similar improvement characteristic. The other two methods are not sensitive to jamming types because they rely on identifying interference-free segments. The TMF method provides great interference suppression for them because it recovers each independent jamming slice, and all three types of jamming are based on the combination of multiple jamming slices.
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameter | Symbol | Unit | Value |
---|---|---|---|
Signal-to-noise ratio | dB | 0 | |
Jamming-to-signal ratio | dB | 15 | |
Radar signal cycle | T | s | 10 |
Radar signal band width | B | MHz | 100 |
Radar receiver complex sampling frequency | MHz | 150 | |
Target location | m | 200 | |
Main false target location | m | 678 | |
ISRJsampling pulse width | s | 1 | |
Pulse repetition interval of ISPRJ | s | 2 | |
Slice number of ISPRJ | 3 |
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Lu, L.; Gao, M. A Truncated Matched Filter Method for Interrupted Sampling Repeater Jamming Suppression Based on Jamming Reconstruction. Remote Sens. 2022, 14, 97. https://doi.org/10.3390/rs14010097
Lu L, Gao M. A Truncated Matched Filter Method for Interrupted Sampling Repeater Jamming Suppression Based on Jamming Reconstruction. Remote Sensing. 2022; 14(1):97. https://doi.org/10.3390/rs14010097
Chicago/Turabian StyleLu, Lu, and Meiguo Gao. 2022. "A Truncated Matched Filter Method for Interrupted Sampling Repeater Jamming Suppression Based on Jamming Reconstruction" Remote Sensing 14, no. 1: 97. https://doi.org/10.3390/rs14010097