| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide techniques to support low density parity check (LDPC) encoding and decoding. <P>SOLUTION: LDPC encoding and decoding of packets of varying sizes may be supported with a set of base parity check matrices of different dimensions and a set of lifting values of different powers of two. A base parity check matrix G of dimension m<SB POS="POST">B</SB>×n<SB POS="POST">B</SB>may be used to encode a packet of up to k<SB POS="POST">B</SB>=n<SB POS="POST">B</SB>-m<SB POS="POST">B</SB>information bits to obtain a coded packet or a codeword of n<SB POS="POST">B</SB>code bits. This base parity check matrix G may be "lifted" by a lifting value of L to obtain a lifted parity check matrix H of dimension L m<SB POS="POST">B</SB>×L n<SB POS="POST">B</SB>. The lifted parity check matrix H may be used to encode a packet of up to L k<SB POS="POST">B</SB>information bits to obtain a codeword of L n<SB POS="POST">B</SB>code bits. <P>COPYRIGHT: (C)2013,JPO&INPIT |
