Unknown sound source number DOA estimation method based on S transformation
A number and sound source technology, applied in complex mathematical operations, systems for determining direction or offset, direction finders using ultrasonic/sonic/infrasonic waves, etc. effect of number
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[0055] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. Such as figure 1 Shown, the present invention provides a kind of unknown sound source number DOA estimation method based on S transform, comprises the following steps:
[0056] 1) In the sound field, arrange a uniform and linear array of microphones, use the data collector to collect a segment of voice signal synchronously, and obtain the array receiving signal;
[0057] 2) After setting the S-transform parameters according to the effective frequency band of the received signal, perform S-transform on the signal to obtain the S-transform result; the specific steps are as follows:
[0058] First define the received signal of the mth array element in the array as:
[0059]
[0060] P is the number of signal sources, s p (t) is the incident signal of P broadband signal sources, τ ...
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