Methods of joint coding in mobile communication system
A joint coding method in a mobile communication system is disclosed. To block-code kχ-bit first data requiring a received signal quality and k2˜bit second data requiring a different received signal quality, the present invention includes configuring a first block code generation matrix meeting a first minimum hamming distance, configuring a second block code generation matrix meeting a second minimum hamming distance, and configuring a third block code generation matrix including the first block code generation matrix, the second block code generation matrix and a zero matrix of a specific size. Accordingly, the present invention encodes and transmits two data requiring different received signal qualities by one coding scheme, thereby enabling each data to have the required received signal quality in decoding.
1. In performing block coding on k1-bit first data requiring a received signal quality and k2-bit second data requiring a different received signal quality, a method of joint coding, the method comprising:
configuring a first block code generation matrix meeting a first minimum hamming distance;
configuring a second block code generation matrix meeting a second minimum hamming distance;
configuring a third block code generation matrix including the first block code generation matrix, the second block code generation matrix and a zero matrix having a predetermined size; and
coding a serial combination of the first and second data to have an n-bit length using the third block code generation matrix,
wherein the first block code generation matrix is divided into a first partial matrix having a third minimum hamming distance equal to or greater than the first minimum hamming distance and a second partial matrix having a fourth minimum hamming distance equal to or greater than the first minimum hamming distance,
wherein the third block code generation matrix includes the zero matrix located at a right side of the first partial matrix, and the second block code generation matrix located at a right side of the second partial matrix.
2. The method of claim 1 , wherein a last n2 column of the third block code generation matrix is column-permutated with columns of the third block code generation matrix other than the n2 column, and wherein n2 indicates a column size of the second block code generation matrix.
3. The method of claim 1 , wherein:
the first data comprises a channel quality indicator (CQI); and
the second data comprises an ACK/NACK indicator for acknowledgement of a HARQ process indicator.
4. The method of claim 1 , wherein the received signal quality required for the second data is higher than the received signal quality required for the first data.
5. The method of claim 4 , wherein in a class corresponding to an exclusive-OR operation set between at least one portion of a first sub-codeword generated from the first data and a first sub-code generation matrix corresponding to a k1 row of the third block code generation matrix and at least one portion of a second sub-codeword generated from the second data and a second sub-code generation matrix corresponding to rows of the third block code generation matrix other than the k1 row, an intra-class minimum hamming distance is smaller than an inter-class minimum hamming distance.
6. The method of claim 4 , wherein:
the first data comprises a channel quality indicator (CQI); and
the second data comprises an ACK/NACK indicator for acknowledgement of a HARQ process indicator.