Patent ID: 7088672
Filing Date: 2006-08-08
Classification: H04L

Abstract:
1. A device for restoring an orthogonal frequency division multiplexing (OFDM) signal by estimating a transmission channel property of the OFDM signal from correlation between the m-th and m+1th symbols of the OFDM signal, a device for receiving the OFDM signal, comprising: an ADC for converting an analog OFDM signal into a digital signal; a control device for sampling the digital signal from the ADC according to a sampling clock generated with a predetermined timing, and detecting a symbol from the sampling value; an FFT unit for performing a fast Fourier transform on the symbol from the control device; an operation device for calculating a common phase noise and an offset amount by the sampling clock timing in regard to the symbol from the FFT unit, compensating for the symbol according to the resultant value, and providing the offset amount by the sampling clock timing to the control device; a channel estimation unit for estimating a channel property value according to the symbol compensated by the operation device; and an equalizing device for compensating for channel distortion of the symbol from the FFT unit according to the channel property value from the channel estimation unit.