Patent ID: 6304136
Filing Date: 2001-10-16
Classification: H03D,H04L

Abstract:
A method of demodulating signals from a source, comprising:differentiating an in-phase signal and a quadrature signal to produce a differentiated value of the in-phase signal and a differentiated value of the quadrature signal;oversampling the in-phase and the quadrature signals by a predetermined factor with respect to data rate, wherein data is sampled using a predetermined time period;modifying a sign for the differentiated values of the in-phase and the quadrature signals based on the sign of the quadrature and in-phase signals respectively to produce modified values of the differentiated in-phase and quadrature signals;processing the modified differentiated in-phase and quadrature values to produce an output, wherein sensitivity to noise is reduced by discarding a smaller of the modified differentiated in-phase or quadrature signal; andthe oversampling of the in-phase and the quadrature signals comprising reducing sensitivity to noise by implementing the predetermined time period allowing use of a plurality of circuitry.