Patent ID: 6732327
Filing Date: 2004-05-04
Classification: H03M

Abstract:
A method of iteratively decoding a Turbo-coded frame comprising the steps of:(a) setting a first feedback value to zero; (b) decoding X and Y1 elements of the frame and the first feedback value in a first decoder determined according to a first encoder at a transmitter of the signal; (c) calculating a first difference between output of the first decoder and a sum of the first feedback value and X element of the frame; (d) scaling the first difference by a predetermined value; (e) interleaving the scaled first difference in an interleaver determined according to an interleaver at the transmitter to produce a second feedback value; (f) decoding X and Y2 elements of the frame and the second feedback value in a second decoder determined according to a second encoder at the transmitter; (g) calculating a second difference between output of the second decoder and a sum of the second feedback value and X element of the frame; (h) scaling the second difference by the predetermined value; (i) deinterleaving output of the second decoder in a deinterleaver determined according to the interleaver at the transmitter to produce the first feedback value; (j) repeating steps (b) through (i) a predetermined number of times; and (k) after repeating steps (b) through (i) the predetermined number of times, outputting decoded frame data from the second decoder.