Patent ID: 7443782
Filing Date: 2008-10-28
Classification: H04L

Abstract:
1. An adaptive inter-carrier interference (ICI) self-cancellation method for an orthogonal frequency-division multiplexing (OFDM) system, the method comprising the steps of: a) estimating in a first communication device a maximum frequency offset and signal-noise power ratio (SNR) of signals transmitted by a second communication device via a transmission channel; b) using the maximum frequency offset and SNR estimated in the step a) in said second communication device to select a working state of a digital modulator and an ICI self-cancellation modulator based on an adaptive strategy, and controlling said digital modulator and said ICI self-cancellation modulator to work in accordance with said working state; c) based on the working state of the digital modulator and the ICI self-cancellation modulator in said second communication device selected in the step b), determining, in the first communication device, the corresponding working state of a digital demodulator and an ICI self-cancellation demodulator in said first communication device, and controlling said digital demodulator and said ICI self-cancellation demodulator to work in accordance with said working state; and repeating periodically steps a), b), and c).