Burst Digital Correlator for LDV Signal Processing. 3rd Report. Burst Detection of LDV by Correlation Method.
Yuji Ikeda, Noboru Kurihara, Tsuyoshi Nakajima · TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B · 1992
This paper presents a burst detection method, called a correlation trigger, which can extract Doppler signals from noisy and visually indistinguishable signals. The correlation trigger uses a burst digital correlator in which the strength of correlation is expressed by the height between the peaks and troughs of the correlation function, and depends on the SNR. The results of numerical simulation show that the correlation trigger can detect the Doppler signals down to SNR=-10dB. It was found that the amplitude triggering can not detect low SNR data of less than 0dB, and the reasonable correlation threshold level was one-sixth of the sample number to be correlated. The BDC correlation trigger is effective for low SNR, wide bandwidth, wide dynamic range, small fringe number, and high deta-rate.