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Robust Chinese Remainder Theorem Ranging Method Based on Dual-Frequency Measurements

Robust Chinese Remainder Theorem Ranging Method Based on Dual-Frequency Measurements,10.1109/TVT.2011.2167690,IEEE Transactions on Vehicular Technolog

Robust Chinese Remainder Theorem Ranging Method Based on Dual-Frequency Measurements  
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The Chinese remainder theorem (CRT) is an effective tool to solve the phase ambiguity problem in phase-based range estimation. However, existing methods suffer from problems such as requiring special measuring frequency, low spectrum efficiency, noise sensitivity, etc. To overcome these problems, this paper presents a CRT ranging method using two "adjacent" frequencies. As a result, all the frequencies in the given frequency span can be used, which greatly increases spectrum utilization. Moreover, since the same distance is measured by different frequency pairs, statistical processing can be performed on the results, which fur- ther improves estimation accuracy. Simulations verify the validity of the proposed method. Index Terms—Carrier phase, Chinese remainder theorem (CRT), dual frequency, ranging, robustness.
Journal: IEEE Transactions on Vehicular Technology - IEEE TRANS VEH TECHNOL , vol. 60, no. 8, pp. 4094-4099, 2011
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