Patent ID: 7023930

Claim:
A method for reducing the crest factor of a multi-carrier signal, the method comprising: (a) evaluating an inverse Fourier transform of the multi-carrier signal, thereby generating a transformed multi-carrier signal; (b) defining a signal-to-be-corrected to be the transformed multi-carrier signal; (c) generating a simulated output signal, wherein generating a simulated output signal comprises filtering the signal-to-be-corrected; (d) estimating a signal maximum of the simulated output signal; (e) deriving a first correction variable on the basis of the estimate; (f) correcting the signal-to-be-corrected using at least the first correction variable, thereby generating a corrected output signal having a reduced crest factor; (g) defining the corrected output signal to be the signal-to-be-corrected; and (h) iteratively repeating steps (c) through (g) until the occurrence of a condition selected from the group consisting of causing the corrected output signal to have a crest factor below a predetermined threshold, and performing a predetermined number of iterations; the method further comprising reducing a bit width of the transformed multi-carrier signal.