Patent ID: 6088403
Filing Date: 2000-07-11
Classification: H04J,H04L

Abstract:
Method for extracting component information waves from a combined information wave, said combined information wave comprising two or more component information waves of known and distinct frequencies and known wave forms and relative phases, one half cycle of each component information wave, an information segment, having its amplitude determined as a function of the information carried and the other half cycle, a calibration segment, having a known calibration amplitude, said method comprising:a) a step of determining an amplitude of the combined information wave at the mid-cycle zero crossing point of each of the component information waves;b) a step of generating amplitude equations, one of the amplitude equations corresponding to each of the mid-cycle zero crossing points, with the sum of the unknown or known amplitude coefficients of each of the non-zero component information waves, as adjusted by the phase factor for the corresponding component information wave, being equal to the measured amplitude of the combined information wave at the mid-cycle zero crossing point;c) a step of solving the amplitude equations to determine the amplitude coefficients of each of the component information waves;d) a step of generating a calibration amplitude equation for one or more selected points on the combined information wave, at which points each of the component information waves has a known amplitude, and the sum of the products of the known amplitude coefficients of the respective component information waves, as adjusted by the known phase factor for the corresponding component information wave, multiplied by the respective known amplitudes of corresponding component information waves being equal to the amplitude of the combined information wave at the selected points; ande) a step of computing the amplitude of the combined information wave through use of the calibration amplitude equations, comparing the computed amplitude with the measured amplitude at each of the calibration points, and calibrating the amplitude coefficients determined above for each of the component information waves.