Time-Delay Estimation Based on Multilayer Correlation
نویسندگان
چکیده
Time-delay estimation technique is a key to acoustic temperature field measurement. In order to acquire a stable acoustic time-of-flight in low SNR, a time-delay estimation method combined multilayer cross-correlation and multilayer auto-correlation (MC method for short) is proposed. Crosscorrelation method and second correlation method are described briefly for comparison. Theory analysis and simulation research in MATLAB prove that MC method can obtain highest estimation precision among these three methods when the signal to noise ratio is low.
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