Patent ID: 7389464
Filing Date: 2008-06-17
Classification: H03M,H04L

Abstract:
1. A method for generating a parity check matrix of a space-time low density parity check (LDPC) code in a mobile communication system including a transmitter using a plurality of transmission antennas and a receiver using a plurality of reception antennas, the method comprising the steps of: determining a size of a parity check matrix such that the size of the parity check matrix corresponds to a coding rate used when information data is encoded into a space-time LDPC code and a length of a codeword of the space-time LDPC code; dividing the parity check matrix having the determine size into a first partial matrix corresponding to the information data and a second partial matrix corresponding to a parity; generating a third partial matrix comprised of even-numbered columns of the first partial matrix, a fourth partial matrix comprised of odd-numbered columns of the second partial matrix, a fifth partial matrix obtained by combining the third partial matrix with the fourth partial matrix, a sixth partial matrix comprised of odd-numbered columns of the first partial matrix, a seventh partial matrix comprised of even-numbered columns of the second partial matrix, an eighth partial matrix obtained by combining the sixth partial matrix with the seventh partial matrix, and a ninth partial matrix obtained by exclusive-ORing the first partial matrix and the second partial matrix; and generating the parity check matrix such that the fifth partial matrix and the eighth partial matrix have a predetermined rank in the ninth partial matrix and a binary field.