Long-Time Coherent Integration Method for Passive Bistatic Radar Using Frequency Hopping Signals
Long-time coherent integration using frequency hopping signals is a challenging problem for passive bistatic radar due to its frequency hopping characteristics. Apart from range walk, range curve, and Doppler frequency migration, Doppler diffusion caused by frequency hopping characteristics occurs w...
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| Format: | Article |
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MDPI AG
2024-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/19/6236 |
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| author | Gang Chen Xiaowei Biao Yi Jin Changzhi Xu Yifan Ping Sujun Wang |
| author_facet | Gang Chen Xiaowei Biao Yi Jin Changzhi Xu Yifan Ping Sujun Wang |
| author_sort | Gang Chen |
| collection | DOAJ |
| description | Long-time coherent integration using frequency hopping signals is a challenging problem for passive bistatic radar due to its frequency hopping characteristics. Apart from range walk, range curve, and Doppler frequency migration, Doppler diffusion caused by frequency hopping characteristics occurs within the observation time, which also lowers the detection performance. To deal with this problem, a novel coherent integration method for frequency hopping signals based on passive bistatic radar is proposed in this paper. In this novel method, range curve and range walk are eliminated by applying generalized Keystone transform. Then, Doppler frequency migration caused by the target’s acceleration is compensated for by a parameter search with a designed search scope. Finally, Doppler frequency migration caused by frequency hopping characteristics is compensated for by designing a new acceleration compensation function and a revised rotation factor for Fourier transform. Since migration effects caused by frequency hopping characteristics are considered and compensated for when using frequency hopping signals, the weak target echo can be better integrated in the observation time compared to when using the existing methods. The simulation results and performance analysis illustrate the effectiveness of the proposed method. |
| format | Article |
| id | doaj-art-b7ab0b2e50a549e8b577c847eaadbe3f |
| institution | OA Journals |
| issn | 1424-8220 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-b7ab0b2e50a549e8b577c847eaadbe3f2025-08-20T01:47:34ZengMDPI AGSensors1424-82202024-09-012419623610.3390/s24196236Long-Time Coherent Integration Method for Passive Bistatic Radar Using Frequency Hopping SignalsGang Chen0Xiaowei Biao1Yi Jin2Changzhi Xu3Yifan Ping4Sujun Wang5China Academy of Space Technology, Xi’an 710100, ChinaChina Academy of Space Technology, Xi’an 710100, ChinaChina Academy of Space Technology, Xi’an 710100, ChinaChina Academy of Space Technology, Xi’an 710100, ChinaChina Academy of Space Technology, Xi’an 710100, ChinaChina Academy of Space Technology, Xi’an 710100, ChinaLong-time coherent integration using frequency hopping signals is a challenging problem for passive bistatic radar due to its frequency hopping characteristics. Apart from range walk, range curve, and Doppler frequency migration, Doppler diffusion caused by frequency hopping characteristics occurs within the observation time, which also lowers the detection performance. To deal with this problem, a novel coherent integration method for frequency hopping signals based on passive bistatic radar is proposed in this paper. In this novel method, range curve and range walk are eliminated by applying generalized Keystone transform. Then, Doppler frequency migration caused by the target’s acceleration is compensated for by a parameter search with a designed search scope. Finally, Doppler frequency migration caused by frequency hopping characteristics is compensated for by designing a new acceleration compensation function and a revised rotation factor for Fourier transform. Since migration effects caused by frequency hopping characteristics are considered and compensated for when using frequency hopping signals, the weak target echo can be better integrated in the observation time compared to when using the existing methods. The simulation results and performance analysis illustrate the effectiveness of the proposed method.https://www.mdpi.com/1424-8220/24/19/6236coherent integrationfrequency hoppingrange walkrange curveDoppler frequency migrationpassive bistatic radar |
| spellingShingle | Gang Chen Xiaowei Biao Yi Jin Changzhi Xu Yifan Ping Sujun Wang Long-Time Coherent Integration Method for Passive Bistatic Radar Using Frequency Hopping Signals Sensors coherent integration frequency hopping range walk range curve Doppler frequency migration passive bistatic radar |
| title | Long-Time Coherent Integration Method for Passive Bistatic Radar Using Frequency Hopping Signals |
| title_full | Long-Time Coherent Integration Method for Passive Bistatic Radar Using Frequency Hopping Signals |
| title_fullStr | Long-Time Coherent Integration Method for Passive Bistatic Radar Using Frequency Hopping Signals |
| title_full_unstemmed | Long-Time Coherent Integration Method for Passive Bistatic Radar Using Frequency Hopping Signals |
| title_short | Long-Time Coherent Integration Method for Passive Bistatic Radar Using Frequency Hopping Signals |
| title_sort | long time coherent integration method for passive bistatic radar using frequency hopping signals |
| topic | coherent integration frequency hopping range walk range curve Doppler frequency migration passive bistatic radar |
| url | https://www.mdpi.com/1424-8220/24/19/6236 |
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