Ldpc encoding and decoding of packets of variable sizes

A method of processing data, comprising:

• encoding or decoding packets of variable sizes based on a set of base parity check matrices of different dimensions and a set of lifting values of different powers of two.

An apparatus for processing data, comprising:

• means for encoding or decoding packets of variable sizes based on a set of base parity check matrices of different dimensions and a set of lifting values of different powers of two.

A computer program product, comprising:

• a computer-readable medium comprising:
• code for causing at least one computer to encode or decode packets of variable sizes based on a set of base parity check matrices of different dimensions and a set of lifting values of different powers of two.

An apparatus comprising:

• at least one processor configured to determine a first set of cyclic shift values for a first parity check matrix of a first lift size based on a second set of cyclic shift values for a second parity check matrix of a second lift size, the first and second lift sizes being different powers of two, to generate the first parity check matrix based on the first set of cyclic shift values, and to encode or decode a packet based on the first parity check matrix;
• and
• a memory coupled to the at least one processor.

An apparatus comprising:

• at least one processor configured to obtain a lifted parity check matrix by replacing each non-zero element of a base parity check matrix with an L×L permutation matrix of a particular cyclic shift value, where L is a power of two, to use cyclic shift values of s and s+L/m for two non-zero elements in a column of the base parity check matrix having at least three non-zero elements, where s is an arbitrary value and m is a power of two, and to encode or decode a packet based on the lifted parity check matrix;
• and
• a memory coupled to the at least one processor.