OFDM-Based Carrier Phase Localization With Integer Ambiguity Resolution
This study introduces a two-stage Time Difference of Arrival (TDoA) localization method using OFDM signals with carrier-phase measurements. Unlike conventional methods, our approach uniquely resolves integer ambiguities in carrier-phase signals by combining the coarse estimates derived from multiple...
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| Format: | Article |
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IEEE
2025-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/11069288/ |
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| author | Jai Hyung Cho Jie Hyun Lee |
| author_facet | Jai Hyung Cho Jie Hyun Lee |
| author_sort | Jai Hyung Cho |
| collection | DOAJ |
| description | This study introduces a two-stage Time Difference of Arrival (TDoA) localization method using OFDM signals with carrier-phase measurements. Unlike conventional methods, our approach uniquely resolves integer ambiguities in carrier-phase signals by combining the coarse estimates derived from multiple long-wavelength subcarrier phase differences within a single OFDM symbol. Subsequently, fine TDoA measurements from high-frequency carrier-phase signals utilize these coarse references for precise positioning. We present a maximum-likelihood estimator (MLE), analyze its performance using the Fisher information matrix and Cramér-Rao Lower bound (CRLB), and validate our method through simulations and field tests, demonstrating sub-meter accuracy and significant robustness improvements over existing techniques. |
| format | Article |
| id | doaj-art-4b1b241db5884ca3a253a4fa25775654 |
| institution | DOAJ |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-4b1b241db5884ca3a253a4fa257756542025-08-20T02:45:41ZengIEEEIEEE Access2169-35362025-01-011312475212476210.1109/ACCESS.2025.358549511069288OFDM-Based Carrier Phase Localization With Integer Ambiguity ResolutionJai Hyung Cho0https://orcid.org/0009-0008-2793-5603Jie Hyun Lee1https://orcid.org/0009-0009-2899-7264Locaila, Inc., San Jose, CA, USAElectronics and Telecommunications Research Institute (ETRI), San Jose, CA, USAThis study introduces a two-stage Time Difference of Arrival (TDoA) localization method using OFDM signals with carrier-phase measurements. Unlike conventional methods, our approach uniquely resolves integer ambiguities in carrier-phase signals by combining the coarse estimates derived from multiple long-wavelength subcarrier phase differences within a single OFDM symbol. Subsequently, fine TDoA measurements from high-frequency carrier-phase signals utilize these coarse references for precise positioning. We present a maximum-likelihood estimator (MLE), analyze its performance using the Fisher information matrix and Cramér-Rao Lower bound (CRLB), and validate our method through simulations and field tests, demonstrating sub-meter accuracy and significant robustness improvements over existing techniques.https://ieeexplore.ieee.org/document/11069288/Ambiguity resolutioncarrier-phaselocalizationmaximum likelihood estimationOFDMtime difference of arrival (TDoA) |
| spellingShingle | Jai Hyung Cho Jie Hyun Lee OFDM-Based Carrier Phase Localization With Integer Ambiguity Resolution IEEE Access Ambiguity resolution carrier-phase localization maximum likelihood estimation OFDM time difference of arrival (TDoA) |
| title | OFDM-Based Carrier Phase Localization With Integer Ambiguity Resolution |
| title_full | OFDM-Based Carrier Phase Localization With Integer Ambiguity Resolution |
| title_fullStr | OFDM-Based Carrier Phase Localization With Integer Ambiguity Resolution |
| title_full_unstemmed | OFDM-Based Carrier Phase Localization With Integer Ambiguity Resolution |
| title_short | OFDM-Based Carrier Phase Localization With Integer Ambiguity Resolution |
| title_sort | ofdm based carrier phase localization with integer ambiguity resolution |
| topic | Ambiguity resolution carrier-phase localization maximum likelihood estimation OFDM time difference of arrival (TDoA) |
| url | https://ieeexplore.ieee.org/document/11069288/ |
| work_keys_str_mv | AT jaihyungcho ofdmbasedcarrierphaselocalizationwithintegerambiguityresolution AT jiehyunlee ofdmbasedcarrierphaselocalizationwithintegerambiguityresolution |