A receive-coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errors
Abstract Airborne distributed coherent aperture radar (ADCAR) obtain target coherent parameters (TCPs) and improve target detection performance significantly in the receive-coherent (RC) stage by multiple physically isolated airborne radars with orthogonal waveforms. However, the heterogeneous clutt...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-05-01
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| Series: | EURASIP Journal on Advances in Signal Processing |
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| Online Access: | https://doi.org/10.1186/s13634-025-01217-8 |
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| author | Xiaochuan Liu Dongming Zhou Hongwei Gao Yaobing Lu |
| author_facet | Xiaochuan Liu Dongming Zhou Hongwei Gao Yaobing Lu |
| author_sort | Xiaochuan Liu |
| collection | DOAJ |
| description | Abstract Airborne distributed coherent aperture radar (ADCAR) obtain target coherent parameters (TCPs) and improve target detection performance significantly in the receive-coherent (RC) stage by multiple physically isolated airborne radars with orthogonal waveforms. However, the heterogeneous clutter with unknown power arising from imperfect orthogonal waveforms, and the random phase errors (RPE) introduced by phase synchronization between nodes, all of which cause severe degradation of detection performance. In this paper, we propose a RC signal model of ADCAR in cluttered environments under the RPE modeling by the von Mises distribution. Then, a two-step RC generalized likelihood ratio test (GLRT) detector with a simplified expectation maximization (EM) algorithm (2S-RVEM-G) is proposed, which iteratively solves for the unknown parameters under the alternative hypotheses by the EM algorithm to achieve target detection of ADCAR under heterogeneous clutter and RPE. Then, a detection strategy without prior information is proposed to enhance the proposed algorithm’s feasibility further. Finally, experimental results indicate that the target detection performance of 2S-RVEM-G is better than the traditional detectors, and the proposed strategy also ensures decent performances without prior information, proving the proposed method’s effectiveness. |
| format | Article |
| id | doaj-art-3efd730a00e044cfa49fa3fdb2da8f2e |
| institution | DOAJ |
| issn | 1687-6180 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Advances in Signal Processing |
| spelling | doaj-art-3efd730a00e044cfa49fa3fdb2da8f2e2025-08-20T03:08:43ZengSpringerOpenEURASIP Journal on Advances in Signal Processing1687-61802025-05-012025112710.1186/s13634-025-01217-8A receive-coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errorsXiaochuan Liu0Dongming Zhou1Hongwei Gao2Yaobing Lu3Beijing Institute of Radio MeasurementBeijing Institute of Radio MeasurementBeijing Institute of Radio MeasurementBeijing Institute of Radio MeasurementAbstract Airborne distributed coherent aperture radar (ADCAR) obtain target coherent parameters (TCPs) and improve target detection performance significantly in the receive-coherent (RC) stage by multiple physically isolated airborne radars with orthogonal waveforms. However, the heterogeneous clutter with unknown power arising from imperfect orthogonal waveforms, and the random phase errors (RPE) introduced by phase synchronization between nodes, all of which cause severe degradation of detection performance. In this paper, we propose a RC signal model of ADCAR in cluttered environments under the RPE modeling by the von Mises distribution. Then, a two-step RC generalized likelihood ratio test (GLRT) detector with a simplified expectation maximization (EM) algorithm (2S-RVEM-G) is proposed, which iteratively solves for the unknown parameters under the alternative hypotheses by the EM algorithm to achieve target detection of ADCAR under heterogeneous clutter and RPE. Then, a detection strategy without prior information is proposed to enhance the proposed algorithm’s feasibility further. Finally, experimental results indicate that the target detection performance of 2S-RVEM-G is better than the traditional detectors, and the proposed strategy also ensures decent performances without prior information, proving the proposed method’s effectiveness.https://doi.org/10.1186/s13634-025-01217-8Airborne distributed coherent aperture radar (ADCAR)Target detectionReceive-coherent stageHeterogeneous clutter mitigationRandom phase errors |
| spellingShingle | Xiaochuan Liu Dongming Zhou Hongwei Gao Yaobing Lu A receive-coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errors EURASIP Journal on Advances in Signal Processing Airborne distributed coherent aperture radar (ADCAR) Target detection Receive-coherent stage Heterogeneous clutter mitigation Random phase errors |
| title | A receive-coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errors |
| title_full | A receive-coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errors |
| title_fullStr | A receive-coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errors |
| title_full_unstemmed | A receive-coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errors |
| title_short | A receive-coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errors |
| title_sort | receive coherent detector for airborne distributed coherent aperture radar under heterogeneous clutter and random phase errors |
| topic | Airborne distributed coherent aperture radar (ADCAR) Target detection Receive-coherent stage Heterogeneous clutter mitigation Random phase errors |
| url | https://doi.org/10.1186/s13634-025-01217-8 |
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