LDPC CODE DESIGN AND ENCODING APPARATUS FOR THEIR APPLICATION

摘要

The invention relates to a method and an apparatus related to Low-Density Parity Check codes for wireless telecommunication systems. A method to encode a block of data bits comprises i) defining packets of bits including the data bits; ii) splitting each packet into sets of equal number of bits; iii) providing shift parameters that define circulant blocks, iv) performing consecutive shifting operations, based on the shift parameters either over bits within a set or over sets of bits within a packet. Each circulant block is established by cyclic permutation of a diagonal or anti-diagonal matrix and defined by a single shift parameter. An apparatus for encoding comprises a sparse matrix multiplier that includes a chain of components and a controller. The components include memory means to store sets with equal number of bits, and at least three cascaded processing means configured to perform binary operations. The controller is configured to provide the shift parameters to the processing means and the memory means.