Weak signal extraction in non-stationary channel with weak measurement
Abstract An emerging challenge of integrated communication and sensing is the extraction of weak sensing signals transmitted through an unknown non-stationary channel. In this work, we propose a weak signal extraction method with weak measurement. Taking advantage of time division multiplexing, we p...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-12-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-023-01492-7 |
| _version_ | 1797376900526505984 |
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| author | Qi Song Hongjing Li Jingzheng Huang Peng Huang Xiaorui Tan Yu Tao Chunhui Shi Guihua Zeng |
| author_facet | Qi Song Hongjing Li Jingzheng Huang Peng Huang Xiaorui Tan Yu Tao Chunhui Shi Guihua Zeng |
| author_sort | Qi Song |
| collection | DOAJ |
| description | Abstract An emerging challenge of integrated communication and sensing is the extraction of weak sensing signals transmitted through an unknown non-stationary channel. In this work, we propose a weak signal extraction method with weak measurement. Taking advantage of time division multiplexing, we preliminarily estimate the channel via adjustable finite impulse response filter, further suppressing the interfering signal caused by background noises via spectrum shift. By subsequently using the time-varying phase estimation method via weak measurement, the real-time detection of weak signals in the non-stationary channel is achieved. We demonstrate via theoretical analysis and confirmatory experiment that our method is able to amplify the phase shift, to suppress technical noise and to improve detection resolution limit, while proving robust against light source fluctuations, initial phase differences and detector saturation. The method hence enables weak sensing signal extraction with a low signal-to-noise ratio non-stationary channel. Furthermore, we interface our measurement method to squeezed light sources, offering the possibility of surpassing standard quantum limit. |
| first_indexed | 2024-03-08T19:46:13Z |
| format | Article |
| id | doaj.art-3946266bd10c476e83590e1e9c1863e9 |
| institution | Directory Open Access Journal |
| issn | 2399-3650 |
| language | English |
| last_indexed | 2024-03-08T19:46:13Z |
| publishDate | 2023-12-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj.art-3946266bd10c476e83590e1e9c1863e92023-12-24T12:21:14ZengNature PortfolioCommunications Physics2399-36502023-12-01611910.1038/s42005-023-01492-7Weak signal extraction in non-stationary channel with weak measurementQi Song0Hongjing Li1Jingzheng Huang2Peng Huang3Xiaorui Tan4Yu Tao5Chunhui Shi6Guihua Zeng7State Key Laboratory of Advanced Optical Communication Systems and Networks, Institute for Quantum Sensing and Information Processing, School of Sensing Science and Engineering, Shanghai Jiao Tong UniversityState Key Laboratory of Advanced Optical Communication Systems and Networks, Institute for Quantum Sensing and Information Processing, School of Sensing Science and Engineering, Shanghai Jiao Tong UniversityState Key Laboratory of Advanced Optical Communication Systems and Networks, Institute for Quantum Sensing and Information Processing, School of Sensing Science and Engineering, Shanghai Jiao Tong UniversityState Key Laboratory of Advanced Optical Communication Systems and Networks, Institute for Quantum Sensing and Information Processing, School of Sensing Science and Engineering, Shanghai Jiao Tong UniversityState Key Laboratory of Advanced Optical Communication Systems and Networks, Institute for Quantum Sensing and Information Processing, School of Sensing Science and Engineering, Shanghai Jiao Tong UniversityState Key Laboratory of Advanced Optical Communication Systems and Networks, Institute for Quantum Sensing and Information Processing, School of Sensing Science and Engineering, Shanghai Jiao Tong UniversityState Key Laboratory of Advanced Optical Communication Systems and Networks, Institute for Quantum Sensing and Information Processing, School of Sensing Science and Engineering, Shanghai Jiao Tong UniversityState Key Laboratory of Advanced Optical Communication Systems and Networks, Institute for Quantum Sensing and Information Processing, School of Sensing Science and Engineering, Shanghai Jiao Tong UniversityAbstract An emerging challenge of integrated communication and sensing is the extraction of weak sensing signals transmitted through an unknown non-stationary channel. In this work, we propose a weak signal extraction method with weak measurement. Taking advantage of time division multiplexing, we preliminarily estimate the channel via adjustable finite impulse response filter, further suppressing the interfering signal caused by background noises via spectrum shift. By subsequently using the time-varying phase estimation method via weak measurement, the real-time detection of weak signals in the non-stationary channel is achieved. We demonstrate via theoretical analysis and confirmatory experiment that our method is able to amplify the phase shift, to suppress technical noise and to improve detection resolution limit, while proving robust against light source fluctuations, initial phase differences and detector saturation. The method hence enables weak sensing signal extraction with a low signal-to-noise ratio non-stationary channel. Furthermore, we interface our measurement method to squeezed light sources, offering the possibility of surpassing standard quantum limit.https://doi.org/10.1038/s42005-023-01492-7 |
| spellingShingle | Qi Song Hongjing Li Jingzheng Huang Peng Huang Xiaorui Tan Yu Tao Chunhui Shi Guihua Zeng Weak signal extraction in non-stationary channel with weak measurement Communications Physics |
| title | Weak signal extraction in non-stationary channel with weak measurement |
| title_full | Weak signal extraction in non-stationary channel with weak measurement |
| title_fullStr | Weak signal extraction in non-stationary channel with weak measurement |
| title_full_unstemmed | Weak signal extraction in non-stationary channel with weak measurement |
| title_short | Weak signal extraction in non-stationary channel with weak measurement |
| title_sort | weak signal extraction in non stationary channel with weak measurement |
| url | https://doi.org/10.1038/s42005-023-01492-7 |
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