Patent ID: 8611443
Filing Date: 2013-12-17
Classification: H04L

Abstract:
1. 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 eliminating said disturbing signal from the RF received signal using the obtained amplitude and phase estimation values.