Acoustic signal collection method based on compressed sensing
An acoustic signal and compressed sensing technology, applied in wireless communication, using sound waves/ultrasonic waves/infrasonic waves to analyze fluids, electrical components, etc. The effect of transmission pressure
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[0028] The invention patent realizes acoustic signal acquisition at low sampling frequency through a random sparse sampling method on the basis of compressed sensing theory. The principle of the new acoustic signal acquisition is: through figure 2 The specific hardware implementation shown realizes random sparse sampling of acoustic signals, and completes signal reconstruction through weighted L1 norm optimization algorithm.
[0029] In compressed sampling theory, the original signal is defined as , , if the signal is in a transformation basis The following is sparse, then the original signal can be sparsely represented by several vectors under this basis: , where the right formula shows the k-sparse nature of the signal. According to the existing conclusions of compressed sensing, it is possible to perform low-speed sampling on the signal in the sparse domain and realize signal reconstruction. In the acoustic signal, the discrete Fourier or DCT transform domain is us...
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