Patent ID: 8481912

Claim:
A spectrum analyzer for analyzing a spectrum of a real-valued time series signal [X(n), n=1, 2, . . . , N], comprising: an input port for receiving the real-valued time series signal [X(n), n=1, 2, . . . , N] for analysis; processor means for implementing a least absolute deviations regression operation on the real-time series signal to derive coefficients [A N (ω), B N (ω)] representative of an L1-norm harmonic regression of the real-valued time series signal; processor means for squaring the coefficients; processor means for summing the squared coefficients; and processor means for scaling the summed, squared coefficients by a constant “c” to realize a Laplace periodogram of X(n) as L N (ω)=c{[A N (ω)] 2 +[B N (ω)] 2 }.