Patent ID: 8611443

Claim:
A method for cancelling additive sinusoidal disturbances in an Orthogonal Frequency-Division Multiplexing (OFDM) receiver, in which a digital complex baseband signal input is cut into blocks of samples, a guard period thereof is removed, a Discrete Fourier Transform (DFT) is performed on a remainder of each sample block, and data equalization and symbol demapping is performed to output soft bits to be fed to a decoder, wherein a frequency of a disturbance is known, the method comprising: generating a test signal representing a disturbing signal of a known frequency that is presumed to occur in the OFDM receiver within a range of interest of a Radio Frequency (RF) received signal; subjecting said generated test signal to DFT; estimating, in a spur cancellation device with a subset of DFT output bins, an amplitude and a phase of said disturbing signal using said generated test signal to obtain amplitude and phase estimation values (P K ) by using only coefficients with largest absolute values for a weighting pattern; and eliminating said disturbing signal from the RF received signal using the obtained amplitude and phase estimation values.