Patent ID: 7203244
Filing Date: 2007-04-10
Classification: H04L

Abstract:
1. A demodulator, comprising: a fast Fourier transform circuit to analyze a received signal in a window corresponding to a symbol, each symbol conveying several phase- and/or amplitude-modulated carriers, some of which are signaling carriers; a circuit to position said window, said circuit to position said window having a processing unit to process the signaling carriers and a window setting unit coupled to the processing unit, wherein the circuit to position said window is able to use non demodulated signaling carriers and wherein the processing unit is able to determine a quality criterion from the signaling carriers; and one or more first correction units coupled to the fast Fourier transform circuit and controlled using said quality criterion, wherein the circuit to position said window has at least one test circuit including one or more second correction units having a same function as said one or more first correction units, and coupled to the processing unit, itself coupled to the window setting unit and able to control the one or more second correction units.