Music spectrum calculating method, device and medium
OwnerShigeki Ohshimainventor
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Abstract
When the inner product of signal eigenvalue vectors and azimuth vectors is transformed using an FFT and a MUSIC spectrum is calculated (Step 15), the inner product of noise eigenvalue vectors and azimuth vectors is transformed using the FFT and a MUSIC specturm is calculated (Step 17). A DOA is then estimated based on the MUSIC spectrum obtained (Step 16), thereby decreasing the quantity of calculations required for detecting a DOA of an incident wave using MUSIC algorithm.
Claims7
A MUSIC spectrum calculating method of estimating a direction of arrival (DOA) of an incident wave using a MUSIC algorithm, wherein an inner product of a mode vector and one of noise subspace and signal subspace in a calculation of a MUSIC spectrum is calculated, and when the noise subspace is used, the inner product is calculated using a Fourier transformation.
A MUSIC spectrum calculating device for estimating a DOA of an incident wave using MUSIC algorithm, wherein an inner product of a mode vector and one of noise subspace and signal subspace in a calculation of a MUSIC spectrum is calculated, and when the noise subspace is used, the inner product is calculated using a Fourier transformation.
A medium on which a MUSIC spectrum calculation program for estimating a DOA of an incident wave by MUSIC algorithm is recorded, wherein said the MUSIC spectrum calculation program causes a computer to calculate an inner product of a mode vector and one of noise subspace and signal subspace in a calculation of a MUSIC spectrum, and to use a Fourier transformation when the noise subspace is used in a calculation of the inner product.
Dependencies are inferred from the claim text.