Time-division multiplex communication system with a synchronizing circuit at the receiving end which responds to the coding of words inserted in the transmitted information
US5280484A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1992 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Dec 23, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/048
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
There are TDM communication systems in which synchronization is accomplished by means of code words which are transmitted at regular time intervals and coded in a particular code. In systems where the signals are transmitted in packets of uniform length, each of the code words contains the information of the so-called header of a packet. The checking device according to the invention successively checks all n-bit bit groups (X.sub.j to X.sub.j+n-) beginning with any one (X.sub.j) of the successive bits of the received bit sequence as to whether they are coded in a particular code. This is done by calculating the syndrome (S.sub.1 to S.sub.n-k) in several networks (N.sub.1 to N.sub.n-k) which operate in parallel and each of which calculates one syndrome component. The received bit sequence is delayed until the networks have calculated the syndromes for a given n-bit bit group and until a syndrome evaluation circuit (LS) indicates whether the bit group is a code word.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.