Intermediate rate applications of punctured convolutional codes for 8PSK trellis modulation over satellite channels
US5909454A · kind A · utility
57Cited by
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Key dates
| Filing date | Jan 20, 1998 |
| Grant date | Jun 1, 1999 |
| Priority date | — |
| Expiry date | Jan 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/006
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for convolutionally encoding digital data with a rate 5/8 convolutional code. A standard rate 1/2 convolutional code is punctured to rate 5/8 using a puncture map of ##EQU1## and octal generators 133, 171 wherein the constraint length K=7. An incoming data stream is processed using the rate 5/8 code. In another embodiment, a rate 1/3 convolutional code is punctured to rate 5/8 using a puncture map of ##EQU2## and octal generators 117, 135, 161 wherein the constraint length K=7.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.