Patent ID: 7898975

Claim:
A method for obtaining crosstalk information, comprising: obtaining, by a crosstalk coefficient obtaining module, transmission power variation of a crosstalk source and noise power of a crosstalk destination; obtaining a crosstalk coefficient at a frequency point at which a dynamic characteristic changes in accordance with the transmission power variation of the crosstalk source and the noise power of the crosstalk destination; obtaining, by an approximate crosstalk function obtaining module, an approximate crosstalk function H(f) with a Far-End Crosstalk (FEXT) model and line parameters of the crosstalk source and the crosstalk destination; obtaining, by a crosstalk information obtaining module, a approximate crosstalk function H new (f) for an entire frequency band using the crosstalk coefficient; updating the approximate crosstalk function in accordance with H(f) and H new (f); obtaining the crosstalk information by performing a recursive operation on the updated approximate crosstalk function; and setting a convergence coefficient, wherein updating the approximate crosstalk function comprises: obtaining the crosstalk information by calculating a product of the approximate crosstalk function and the convergence coefficient, calculating the difference between a constant 1 and the convergence coefficient, and calculating a product of the difference and the approximate function H new (f) for the entire frequency band, and calculating a sum of the two products.