Patent ID: 6785348
Filing Date: 2004-08-31
Classification: H04L

Abstract:
A method for demodulating a CPFSK-modulated signal, which comprises:obtaining an estimate Ã¢nâˆ’2 of an nâˆ’1-th substitute symbol anâˆ’1, which occurs in a linear approximation of the CPFSK modulated signal, as a function of a previously determined nâˆ’1-th input data symbol {circumflex over (d)}nâˆ’1; and determining an n-th input data symbol {circumflex over (d)}n on which the CPFSK modulated signal is based by using the estimate Ã¢nâˆ’1 of the nâˆ’1-th substitute symbol anâˆ’1 occurring in the linear approximation of the CPFSK modulated signal to compare a phase angle of a currently obtained n-th complex-value sample symbol yn relative to a phase angle of the estimate Ã¢nâˆ’1 of the nâˆ’1-th substitute symbol anâˆ’1 that has been estimated for an nâˆ’1-th time step.