Method and apparatus for communicating interleaved data
US5241563A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1992 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Aug 10, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/33
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An interleaver processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver. The pseudorandom interleaved data is processed at the deinterleaver in a pseudorandom order corresponding to that used at the interleaver means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaver on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.