CZT-Based High Performance Frequency Estimation

Accurate and high-performance frequency estimation of a noisy sampled sinusoid sequence with short time length and adjacent overlapping has been attracting top focus in the field of signal processing. Based on the CZT of a single-tone sequence, this paper presents a novel improved Rife CZT-interpola...

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Bibliographic Details
Main Authors: Huang Yuchun, Huang Zailu, Huang Benxiong, Xu Shuhua
Format: Conference Proceeding
Language:English
Subjects:
Computational modeling
Computer simulation
CZT
Frequency estimation
Interference
Maximum likelihood estimation
Parameter estimation
Power system faults
Radar signal processing
Sampling methods
Signal processing algorithms
Online Access:Request full text
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Summary:Accurate and high-performance frequency estimation of a noisy sampled sinusoid sequence with short time length and adjacent overlapping has been attracting top focus in the field of signal processing. Based on the CZT of a single-tone sequence, this paper presents a novel improved Rife CZT-interpolated frequency estimator, which develops an improved Rife algorithm on the symmetry of CZT Linear Spectrum Model by the magnitude relationship between peak and its adjacent CZT coefficients. Computer Monte -Carlo simulations show that the algorithm is effective and the proposed estimator outperforms the traditional Rife-Jane's estimator in accuracy, the CRLB-approximation RMSE of estimation and discriminating capability for adjacent overlapping. It is also shown that the CZT-based estimator has as lower SNR threshold as to about -12 dB and good estimation performance even in the case of very short samples, which is quite suitable for applications of strict stationary requirement.
ISSN:2165-0608
2693-3616
DOI:10.1109/SIU.2007.4298767