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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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/11069288/ |
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| Summary: | 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. |
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| ISSN: | 2169-3536 |