Patent ID: 8121230

Claim:
A method, comprising: correcting mismatches between a digital signal in phase and a digital signal in quadrature, respectively on a channel in phase and a channel in quadrature, originating from a signal broadcast by terrestrial channel, by, measuring a set of first error values during a first period, each value being measured based on an estimated symbol originating from the broadcast signal and a theoretical symbol nearest to the estimated symbol; determining a current value of a second error based on a sum of the first error values of the set of first error values; comparing the current second error value with a previous second error value stored in memory; choosing a value of a current phase shift correction to be added to a previous phase shift introduced between the digital signal in phase and the digital signal in quadrature, the choice being made from at least two phase shift correction values, based on the result of the comparison, and the value of a previous phase shift correction stored in memory; adding the current phase shift correction value chosen to the previous phase shift to obtain a current phase shift; introducing the current phase shift obtained between the digital signal in phase and the digital signal in quadrature; storing in memory the current second error value and the current phase shift correction value; and repeating the above steps.