ADAPTIVE FREQUENCY DOMAIN EQUALIZER AND ADAPTIVE FREQUENCY DOMAIN EQUALIZATION METHOD

摘要

An adaptive frequency domain equalizer and an adaptive frequency domain equalization method are provided to minimize an EMSE(Excess Mean Square Error) by adopting a high-stable root square algorithm. A first DFT(Discrete Fourier Transform)(204) converts a received signal into a frequency domain. A pseudo-time space code matrix generator(208) generates a pseudo-time space code matrix from two successively received signal blocks from the first DFT. An input block matrix generator(210) generates an equalizer input block matrix based on the pseudo-time space code matrix. A channel equalizer(212) performs a channel equalization on the equalizer input block matrix according to an equalizer coefficient. An IDFT(Inverse Discrete Fourier Transform)(214) converts the channel-equalized signal into a time domain. A determining unit(216) generates a determination signal by estimating a transmission signal from the time domain signal. A second DFT(218) converts the determination signal into the frequency domain. An error calculator calculates an error from the determination signal. A compensator(222) compensates for the equalizer coefficient by using the error and the equalizer input block matrix.