Circuit and method for handling wireless sensing

A processing circuit, comprising:

• an estimating circuit, for generating a phase vector according to a phase signal, and for estimating the phase vector to generate an estimated phase matrix;
• a decomposing circuit, coupled to the estimating circuit, for decomposing the estimated phase matrix to generate an eigenvalue matrix and an eigenvector matrix, wherein the eigenvalue matrix comprises a plurality of eigenvalues and the eigenvector matrix comprises a plurality of eigenvectors;
• a first computing circuit, coupled to the decomposing circuit, for performing a long-term average for the plurality of eigenvalues to generate a plurality of long-term eigenvalues;
• a second computing circuit, coupled to the first computing circuit, for computing a plurality of difference values for the plurality of long-term eigenvalues, and for determining an index corresponding to a difference value of the plurality of difference values;
• a spectrum generation circuit, coupled to the second computing circuit, for generating a pseudo spectrum according to the index, the plurality of eigenvectors and a steering vector;
• and
• a determining circuit, coupled to the spectrum generation circuit, for determining at least one peak of the pseudo spectrum and at least one parameter corresponding to the at least one peak.