Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection
When the amplitude of the laser Doppler signal is less than that of the noise amplitude, the speed information cannot be identified. In this paper, the recognition of weak Doppler signals is accomplished by superimposing multiple-frame Doppler signals in the frequency domain and eliminating the base...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/25/12/3775 |
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| _version_ | 1849425171665911808 |
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| author | Chongbin Xi Jian Zhou Xiaoming Nie Shilong Jin |
| author_facet | Chongbin Xi Jian Zhou Xiaoming Nie Shilong Jin |
| author_sort | Chongbin Xi |
| collection | DOAJ |
| description | When the amplitude of the laser Doppler signal is less than that of the noise amplitude, the speed information cannot be identified. In this paper, the recognition of weak Doppler signals is accomplished by superimposing multiple-frame Doppler signals in the frequency domain and eliminating the base noise. Meanwhile, the relative prominence is defined to assess the quality of Doppler signals. The theoretical analysis and experimental results demonstrate that the relative prominence can be enhanced by more than two orders of magnitude through the stacking of 10,000 frames of Doppler signals. Moreover, this paper establishes a foundation for determining the threshold of relative prominence in practical measurements. When the relative prominence at a specific point on the spectrum is 3, there is at least a 99.08% probability that this point corresponds to the target signal. |
| format | Article |
| id | doaj-art-27ebb5e4daa64e008cee4677e76ff9ea |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-27ebb5e4daa64e008cee4677e76ff9ea2025-08-20T03:29:52ZengMDPI AGSensors1424-82202025-06-012512377510.3390/s25123775Signal Processing Method and Evaluation Method for Weak Doppler Signal DetectionChongbin Xi0Jian Zhou1Xiaoming Nie2Shilong Jin3College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaCollege of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, ChinaWhen the amplitude of the laser Doppler signal is less than that of the noise amplitude, the speed information cannot be identified. In this paper, the recognition of weak Doppler signals is accomplished by superimposing multiple-frame Doppler signals in the frequency domain and eliminating the base noise. Meanwhile, the relative prominence is defined to assess the quality of Doppler signals. The theoretical analysis and experimental results demonstrate that the relative prominence can be enhanced by more than two orders of magnitude through the stacking of 10,000 frames of Doppler signals. Moreover, this paper establishes a foundation for determining the threshold of relative prominence in practical measurements. When the relative prominence at a specific point on the spectrum is 3, there is at least a 99.08% probability that this point corresponds to the target signal.https://www.mdpi.com/1424-8220/25/12/3775laser Doppler velocimeterweak Doppler signalsignal superpositionrelative prominencethreshold of relative prominence |
| spellingShingle | Chongbin Xi Jian Zhou Xiaoming Nie Shilong Jin Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection Sensors laser Doppler velocimeter weak Doppler signal signal superposition relative prominence threshold of relative prominence |
| title | Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection |
| title_full | Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection |
| title_fullStr | Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection |
| title_full_unstemmed | Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection |
| title_short | Signal Processing Method and Evaluation Method for Weak Doppler Signal Detection |
| title_sort | signal processing method and evaluation method for weak doppler signal detection |
| topic | laser Doppler velocimeter weak Doppler signal signal superposition relative prominence threshold of relative prominence |
| url | https://www.mdpi.com/1424-8220/25/12/3775 |
| work_keys_str_mv | AT chongbinxi signalprocessingmethodandevaluationmethodforweakdopplersignaldetection AT jianzhou signalprocessingmethodandevaluationmethodforweakdopplersignaldetection AT xiaomingnie signalprocessingmethodandevaluationmethodforweakdopplersignaldetection AT shilongjin signalprocessingmethodandevaluationmethodforweakdopplersignaldetection |