US Patent 7443782 Adaptive inter-carrier interference self-cancellation method and transceiver thereof

The present invention discloses an adaptive ICI self-cancellation method, which can adapt to the dynamical change of frequency offset and signal-noise power ratio (SNR), and a device thereof. The adaptive ICI self-cancellation method of the present invention comprises the steps of: estimating the maximum frequency offset and signal-noise power ratio (SNR) of signals, selecting a modulating state in accordance with an adaptive strategy, and determining a demodulating state based on the selected modulating state. An adaptive inter-carrier interference self-cancellation device using the method comprises: a transmitter including a digital demodulator, an inter-carrier interference self-cancellation modulator and an adaptive controller; and a receiver including a digital demodulator, an inter-carrier interference self-cancellation demodulator, a fast Fourier transformer, an estimator, a signaling demodulator and a demodulation controller. Through the present invention, the cancellation of inter-carrier interference is achieved, and at the same time the working state of the digital modulator and the ICI self-cancellation modulator satisfies the highest spectrum efficiency.