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A New Fine Doppler Frequency Estimator Based on Two-Sample FFT for Pulse Doppler Radar

Title
A New Fine Doppler Frequency Estimator Based on Two-Sample FFT for Pulse Doppler Radar
Authors
Kim, Sang-DongLee, Jong-Hun
DGIST Authors
Kim, Sang-DongLee, Jong-Hun
Issue Date
2013-06
Citation
Ieice Transactions on Communications, E96B(6), 1643-1646
Type
Article
Article Type
Article
Keywords
DFTFFTFine Doppler Frequency EstimatorFourier CoefficientsHigh AccuracyInterpolationPulse Doppler Radar
ISSN
0916-8516
Abstract
We propose a new fine Doppler frequency estimator using two fast Fourier transform (FFT) samples for pulse Doppler radar that offers highly sensitive detection and a high resolution of velocity. The procedure of fine Doppler frequency estimation is completed through coarse frequency estimation (CFE) and fine frequency estimation (FFE) steps. During the CFE step, the integer part of the Doppler frequency is obtained by processing the FFT, after which, during the FFE step, the fractional part is estimated using the relationship between the FFT peak and its nearest resultant value. Our simulation results show that the proposed estimator has better accuracy than Candan's estimator in terms of bias. The root mean square error (RMSE) of the proposed estimator has more than 1.4 time better accuracy than Candan's estimator under a 1,024-point FFT and a signal-to-noise ratio (SNR) of 10 dB. In addition, when the FFT size is increased from 512 to 2,048, the RMSE characteristics of the proposed estimator improve by more than two-fold.
URI
http://hdl.handle.net/20.500.11750/5312
DOI
10.1587/transcom.E96.B.1643
Publisher
IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
Related Researcher
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Future Automotive Technology1. Journal Articles


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