Process for the recovery of data transmitted over a transmission path for digital data streams using decoding by cross-correlation of a data sequence coded by cyclic shifting and inversion
US5504781A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1994 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Aug 1, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4906
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A process for recovering, at the reception end, data transmitted over a transmission path for digital data streams. A code-word generator for generating a binary code word producing a Dirac pulse is provided. The binary code word is cyclically shifted to create further binary code words. The binary code word and further binary code words are inverted to create still further binary code words. The data is coded, on the transmission end of the transmission path, with the binary code word, with the further binary code words, and with the still further binary code words. On the reception end of the transmission path, the data is recovered by cross-correlating the data and by utilizing the position of the main maximum of the cross-correlation functions. To increase the number of code words, a second code-word generator and a third codeword generator, having different generator polynomials, are used for coding binary code words, further binary code words, and still further binary code words, by cyclical shifting and inversion in a manner similar to that above. On the reception end of the transmission path, second and third cross-correlators are additionally used. The main maximum of each…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.