Moderate rate phase shift keying codec
US6735258B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2000 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | May 14, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0068
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided that yields bandwidth efficient low bit rate communication of digital signals in a noisy channel. According to one aspect of the present invention, the invention includes demultiplexing a received input bit stream to divide it into a first block and a second block, convolutionally coding the first block, block coding the second block, mapping the convolutionally coded first block to a sequence of three-bit symbols, so that the bits of the convolutionally coded first block make up one bit of each three-bit symbol, mapping the block coded bits of the second block to the sequence of three-bit symbols, so that the bits of the block coded second block make up two bits of the three-bit symbol, and mapping the three-bit symbols to a phase shift keyed constellation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.