Packet-based multiplication-free CCK demodulator with a fast...

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

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C375S140000, C375S143000, C375S144000, C375S152000

Reexamination Certificate

active

10289749

ABSTRACT:
A complementary code keying (CCK) demodulator used in a RAKE receiver receiving CCK symbols in a multipath environment computes multipath interferences (MPIs) required for canceling intra-codeword chip interference (ICI). The algorithmic structure jointly computes the ICI of a plurality of possible codewords. The algorithmic structure is similar to the optimal architecture required for CCK correlation computations. The similarity between these two structures allows for the use of the same hardware at different times to compute MPIs and to compute the CCK correlation of a plurality of possible codewords.

REFERENCES:
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patent: 6233273 (2001-05-01), Webster et al.
patent: 6324160 (2001-11-01), Martin et al.
patent: 2002/0042256 (2002-04-01), Baldwin et al.
patent: 2002/0122466 (2002-09-01), Somayazulu
X. Qing et al; Reduced-complexity multipath interference cancellation technique; Sep. 24-28, 2002; pp. 1735-1738; VTC 2002.

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