Patent · US Active

Method and device for determining the occupancy of a transmission channel

US7633996B2 · kind B2 · utility

19Cited by

1References

22Claims

0Family size

Assignee

Atmel Automotive GmbH · DE

Inventors

Dirk Haentzschel · Langenburg, DE
Thomas Hanusch · Dresden, DE
Eric Sachse · Leipzig, DE

Key dates

Filing date	Jun 7, 2006
Grant date	Dec 15, 2009
Priority date	—
Expiry date	Jan 19, 2028

Classification

Technology area (CPC H)Electricity
CPC primaryH04W72/0466
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A method for determining the occupancy of a transmission channel using a differentially demodulated signal generated at a transmitter-side with the use of PN sequences from a PN sequence set having a first group of first PN sequences and a second group of second PN sequences. The method provides a) at least two subsequences of an initial code sequence, which is assigned to one of the first PN sequences and can be derived from the sequence by logical operations, but is not identical to it, b) the calculation of at least two correlation results by correlating the differentially demodulated signal with each of the at least two subsequences, and c) the evaluation of the correlation results and generation of an output signal to indicate the occupancy of the transmission channel. Also a device for determining the occupancy of a transmission channel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.