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A Comparative Study of Two Discrete-Time Phase Delay Estimators.
- Source :
- IEEE Transactions on Instrumentation & Measurement; Dec2005, Vol. 54 Issue 6, p2501-2504, 4p
- Publication Year :
- 2005
-
Abstract
- Two simple discrete-time methods for unbiased estimation of the phase-shift between two real sinusoidal signals in white noise are proposed. The first estimator removes the bias of the recently proposed quadrature delay estimator (QDE) by utilizing all in-phase and quadrature-phase components of the received signals. The phase estimate of the second method is given by the phase difference of the discrete-time Fourier transforms (DTFTs) of two complex sinusoids derived from the real signals. In particular, we have derived the mean square phase-shift error of the DTFT-based estimator as well as the minimum achievable variance for phase-shift estimation, which are identical. Computer simulations show that the two proposed estimators are superior to the biased QDE and can attain optimum performance, although the second estimator has a larger signal-to-noise ratio operation range. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189456
- Volume :
- 54
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Instrumentation & Measurement
- Publication Type :
- Academic Journal
- Accession number :
- 19118680
- Full Text :
- https://doi.org/10.1109/TIM.2005.859143