IEEE 802.11 DSSS Modulation

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Symbol

x

x

x

x

x

+1

-1

Chip Numbers

Barker Sequence

x

Possible

Symbol

Positions

Echoes

Information Rate = 1 Bit/Symbol/Quadrature Component = 2 Bits/Symbol

Chips: 11 (Essentially) Orthogonal Positions Due to Barker Code

Note: Only a Single Position (Out of the 11) Is Used

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