In allusion to multi-parameter estimation of multi-spectrum spin echo train (SET) signal in the presence of additive white Gaussian noise

a two-dimensional (2-D) parameter estimation method based on eigenvector is proposed.Using SET signal to construct a 2-D data matrix

and according to the different manner to form Hankel block matrix pencil

the eigenvector is resolved by utilizing the shift-invariance structure of the signal subspace

and then

the damping factor and frequency are estimated according to the structure rule of the eigenvector.The complex amplitude of SET is then obtained on the basis of standard least squares.The method has the capability of auto association.Under relatively large signal-to-noise ratio (SNR) and available frequency resolution conditions

it can estimate the parameters effectively

and has an attractive computation complexity.Simulation results show the effectiveness of the proposed algorithm.