Patent ID: 6637006
Filing Date: 2003-10-21
Classification: H04L

Abstract:
A digital data decoder comprising:an equalizer for equalizing, de-interleaving and de-puncturing a received frame and outputting the frame; a first decoder for decoding the frame outputted from said equalizer and outputting the decoded frame; a first time reverse unit for reversing bits of the frame outputted from said equalizer in a time reversed direction and outputting the time reversed frame; a second decoder for decoding the frame outputted from said first time reverse unit and outputting the decoded frame; a second time reverse unit for reversing bits of the frame outputted from said second decoder in a time reversed direction and outputting the time reversed frame; a comparator for comparing the frame outputted from said first decoder with the frame outputted from said second time reverse unit and outputting the result of the comparison; and a judgment unit for judging the received frame as either reliable or unreliable in accordance with the result of the comparison outputted from said comparator.