Patent ID: 8259843
Filing Date: 2012-09-04
Classification: H03F,H04B,H04W

Abstract:
1. A method for generating covariance matrices A and B for each data capture of a transmit signal, the covariance matrices A and B for use in computing weights W and producing a pre-distorted transmit signal to cancel nonlinearities created by a distorting element or distorting system when transmitting the transmit signal, the method comprising: computing a weighted average of (a) current A and B matrices based solely on a current transmit signal level and (b) one or more previously computed covariance matrices A and B from previous data captures; computing the weights W for each data capture using the current averaged covariance matrices A and B; and validating W by: computing ΔB=B−AW; computing the normalized error rejecting W and utilizing previous W values if E is larger than a predetermined threshold.