Patent ID: 8442474
Filing Date: 2013-05-14
Classification: H03D,H03G,H04B

Abstract:
1. A method of demodulating a received radio frequency (RF) signal in an Adaptive Differentiate Cross Multiply (ADCM) system of receiver containing in-phase (I) and quadrature phase (Q) components, the method comprising: producing, via a normalizing filter, a normalizing estimate; producing, via a differentiate-cross-multiply (DCM) circuit and as a function of the I and Q components, a DCM value; dividing the DCM scaler value by the normalizing estimate to produce a normalized ADCM signal; and adjusting a filter characteristic of the normalizing filter based on at least one of a signal characteristic of the RF signal, a presence or absence of an on-channel signal, and a setting of a component in the receiver other than the normalizing filter.