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| High-accuracy Frequency Estimation Synthetic Algorithm in Laser Doppler Velocity Radar |
| Yang De-zhao Ou Pan Lin Zhi-li Song Ning-fang |
| School of Instrument Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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Abstract In order to achieve high accurate measurement of object’s velocity, a laser Doppler velocity radar system is established and the frequency estimation algorithm is investigated. The frequency estimation method based on autocorrelation operation is improved and the best performance of it is obtained. A new frequency estimation synthetic algorithm based on the Quinn and improved autocorrelation algorithms is propounded, which is adaptive to the Signal-Noise Ratio (SNR). Monte Carlo simulation and rotating cylinder experiment are carried out, and the experimental results indicate that the new algorithm is better than the methods previously reported. The root-mean-square error of the system is smaller than 2 mm/s and the relative error is less than 0.06 % while utilizing the new algorithm. The experimental results are consistent with the analytical and simulation results.
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Received: 16 December 2010
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Corresponding Authors:
Yang De-zhao
E-mail: yangdezhao1234@163.com
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2011, Vol. 33 
