Correlation function generation device, correlation function generation method, correlation function generation program, and wave source direction estimation device

摘要

Even in an environment with a high ambient noise level, a correlation function having a clear peak is generated. The correlation function generation device 100 includes a plurality of input signal acquisition units 101, a change unit 102, a cross spectrum calculation unit 103, a variance calculation unit 104, and a correlation function calculation unit 105. The input signal acquisition unit 101 acquires a wave generated at the wave source as an input signal. The converter 102 converts a plurality of input signals acquired by a plurality of input signal acquisition means to obtain a plurality of frequency domain signals. The cross spectrum calculation unit 103 calculates a cross spectrum based on a plurality of frequency domain signals. The variance calculation unit 104 calculates the variance of the cross spectrum. The correlation function calculation unit 105 calculates and generates a correlation function based on the cross spectrum and the variance.