Channel equalizer using multi antenna

The present invention relates to a channel equalizer for receiving a digital signal using that relates to a channel equalizer, in particular a plurality of antennas. According to the invention, it uses a plurality of antennas for receiving a signal transmitted from the digital receiving system, and signal-to-noise ratio is a maximum of equalization according to the signals received from the plurality of antennas to the channel impulse response value in the frequency domain, groups the initial coefficient and by using a value of adding the plurality of frequency domain equalizer, signal, each equalizer is output from the frequency domain through a plurality of frequency domain equalization for performing each of the channel equalizer adder, converting the output signal of the adder to the time domain by being configured to include IFFT unit for, is the signal-to-noise ratio of the final output like this has the effect of easily equalize the signal of a severe channel distortion. A channel equalizer, a frequency domain, the prediction decision feedback equalizer, noise predictor, antenna