Process for determining the quality parameters of transmission link for digital data streams having a cellular structure
US5392314A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1992 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Dec 21, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2012/5652
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A process for determining quality parameters of a transmission link for digital data streams. The digital data streams have a cellular structure, each cell having a useful field able to be freely occupied with data. In the process, a sequence of test cells is provided as a test signal. The useful fields of the test cells are partially occupied, in each case, with a test pattern. The test pattern consists of a number of binary-coded data wherein the auto-correlation function of the test pattern roughly corresponds to a Dirac pulse. The position of the test pattern within the useful fields of the test cells is shifted within the series of test cells such that the position of the test pattern within the useful field is not repeated in the sequence. The series of test cells is then transmitted though the transmission link. After being transmitted through the transmission link, each cell of the data stream is correlated with a reference pattern. The reference pattern is either identical to the test pattern or to the inverse of the test pattern. Lastly, the maximum of the obtained cross-correlation function is evaluated with respect to its position relative to the start of the particular…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.