Interference reduction in CCK modulated signals

Details Interference reduction in CCK modulated signals Interference reduction in CCK modulated signals

2006-10-31

2006-10-31

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S346000

Reexamination Certificate

active

07130343

ABSTRACT:
A wireless local area network receiver is provided that has an interference reduction unit for reducing interchip interference in a received signal that is modulated using a complementary code keying technique such as CCK-11. The interference reduction unit comprises a decision feedback equalizer that has a feedforward filter for reducing precursor interference and a feedback filter for reducing postcursor interference in the received signal. The receiver may perform channel estimation to optimize the filter coefficients during the preambles of the incoming sequence.

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patent: 2003/0123585 (2003-07-01), Yen
patent: 00/72540 (2000-11-01), None
Andren et al., “CCK Modulation Delivers 11 Mbps for high Rate IEEE 802.11 Extension”, Wireless Symposium/Portable by Design Conference, Spring 1999, pp. 1-10.
Weiss et al., “A Fractionally Spaced DFE with Subband Decorrelation”, Conference on Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar. vol. 2, Oct. 29-Nov. 1, 2000,pp. 1767-1771, vol. 2.
English translation of Official Communication in German application No. 102 08 416.5-31 issued Feb. 10, 2005.

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