Title :
A zero crossing algorithm for time delay estimation
Author :
Chao Zhou ; Chunjie Qiao ; Shen Zhao ; Weihua Dai ; Dongsheng Li
Author_Institution :
Mechatron. & Autom. Sch., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
A new algorithm for time delay estimation (TDE) is proposed, based on zero crossing (ZC). The basic model of zero crossing TDE is discussed, and the mean squared error with additive white Gaussian noise is derived by a theoretic equation. It is shown that the accuracy of TDE is a function of signal-to-noise ratio (SNR), signal frequency and numbers of ZC points. The ZC algorithm approaches a comparable accuracy with FFT method for high SNR, though with low computational complexity and low processing latency. The proposed zero crossing estimator is suitable for real-time applications.
Keywords :
AWGN; computational complexity; delays; estimation theory; fast Fourier transforms; mean square error methods; real-time systems; signal processing; FFT method; SNR; ZC points; additive white Gaussian noise; computational complexity; low processing latency; mean squared error; real-time applications; signal frequency; signal-to-noise ratio; time delay estimation; zero crossing TDE; zero crossing algorithm; zero crossing estimator; computational complexity; mean squared error; time delay estimation(TDE); zero crossing(ZC);
Conference_Titel :
Signal Processing (ICSP), 2012 IEEE 11th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-2196-9
DOI :
10.1109/ICoSP.2012.6491573
