Patent ID: 7035744

Claim:
A system for measuring the energy of a signal, comprising: an acquisition unit for providing samples of the signal; a Hilbert transformer for producing analytical signals from said samples of the signal; a local correlator for computing the convolutions of a CB kernel and instantaneous autocorrelation functions in a window of analysis of length M so as to yield generalized instantaneous autocorrelation functions; said CB kernel being defined by K ⁡ ( n , m ) = { exp ( C ⁡ ( 1 ( n 2 + m 2 ) ⁢ ( B M ) 2 - 1 + 1 ) ) if ⁢ ⁢ ( n 2 + m 2 ) ⁢ ( B M ) 2 < 1 0 Otherwise where B and C are predetermined parameters; and a Fourier transformer for determining a time-frequency distribution of the energy of the signal from said generalized instantaneous autocorrelation functions.