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barker code

The Barker code, originally developed for radar applications, is a coding scheme for spread-spectrum technology (DSSS) in WLANs according to IEEE 802.11b and 802.11g.

Data bits encoded with Barker code

Data bits encoded with Barker code

In this coding scheme, a bit sequence of 13 bits or less replaces a single bit of information. In the case of 802.11 WLANs, a bit sequence of 11 bits is used, where the normal bit sequence corresponds to digital 0 and digital 1 is represented by the inverse bit sequence. The most visible property of the Barker code is the insignificant peaks of the autocorrelation, which always consist of +1, 0 and -1.

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Englisch: barker code
Updated at: 25.09.2007
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