Encoder, decoder, and encoding method
US8397145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2009 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | May 29, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0058
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An encoder and decoder using LDPC-CC (Low Density Parity Check-Convolutional Codes) is disclosed. The encoder exhibits encoding rates realized with a small circuit-scale and a high data reception quality. In the encoder (200), an encoding rate setting unit (250) sets an encoding rate (s−1)/s (s=z), and an information creating unit (210) sets information including from information Xs,i to information Xz−1,i to zero. A first information computing unit (220-1) receives information X1,i at time point i to compute the X1(D) term of formula (1). A second information computing unit (220-2) receives information X2,i at time point i to compute the X2(D) term of formula (1). A third information computing unit (220-3) receives information X3,i at time point i to compute the X3(D) term of formula (1). A parity computing unit (230) receives parity Pi−1 at time point i−1 to compute the P(D) of formula (1). The exclusive OR of the results of the computation is obtained as parity Pi at time i. Ax.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.