Adaptive inter-carrier interference self-cancellation method and transceiver thereof

A receiver of a first communication device in an orthogonal frequency-division multiplexing (OFDM) system, comprising a digital demodulator, an inter-carrier interference (ICI) self-cancellation demodulator connected to said digital demodulator, and a fast Fourier transformer for fast Fourier transforming signals from a baseband filter and outputting to said ICI self-cancellation demodulator, said receiver further comprises:

• an estimator in association with said receiver at work for estimating the maximum frequency offset and signal-noise power ratio (SNR) of signals transmitted from a second communication device via a transmission channel, the maximum frequency offset and SNR obtained from the estimation returning to the second communication device via the communication device where the receiver is located;
• a signaling demodulator in association with said receiver at work for signaling demodulating signals that have been transformed by the fast Fourier transformer;
• and
• a demodulation controller in association with said receiver at work for obtaining from signaling that have been demodulated by a signaling demodulator the working state, transmitted by the second communication device, of a digital modulator and an ICI self-cancellation modulator of the second communication device, determining the corresponding working state of said digital demodulator and said ICI self-cancellation demodulator, and controlling said digital demodulator and said ICI self-cancellation demodulator to work in accordance with said working state.