Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2011-07-26
2011-07-26
Ha, Dac V (Department: 2611)
Pulse or digital communications
Equalizers
Automatic
Reexamination Certificate
active
07986728
ABSTRACT:
A decision feedback equalizer includes a chip estimate buffer that forms chip estimates into a vector. A CCK decoder decodes the vector of chip estimates, and a CCK encoder, connected with the CCK decoder, re-encodes the vector of chip estimates into a valid CCK code word. At the same time, a chip slicer provides direct sliced chips from the chip estimates. An update module then forms a hybrid vector from the valid CCK code-word and the direct sliced chips for input to the feedback filter of the decision feedback equalizer. The hybrid feedback filter input vector reflects the CCK coding gain of its re-encoded portion thereby reducing the estimated chip error rate to improve the performance of the decision feedback equalizer.
REFERENCES:
patent: 6144697 (2000-11-01), Gelfand et al.
patent: 6678310 (2004-01-01), Andren
patent: 6754294 (2004-06-01), Adireddy
patent: 6882692 (2005-04-01), Somayazulu
patent: 7017104 (2006-03-01), Chen et al.
patent: 7027538 (2006-04-01), Ghosh
patent: 7130343 (2006-10-01), Schmidt
patent: 7263119 (2007-08-01), Hsu et al.
patent: 7298798 (2007-11-01), Chao et al.
patent: 7342952 (2008-03-01), Smee et al.
patent: 2004/0101068 (2004-05-01), Wang et al.
patent: 2004/0125884 (2004-07-01), Wei
patent: 2004/0165687 (2004-08-01), Webster
patent: 2005/0254571 (2005-11-01), Garg
patent: 2005/0254572 (2005-11-01), Garg
patent: 0072540 (2000-11-01), None
International Search Report—PCT/US04/017161—International Search Authority—European Patent Office—Nov. 10, 2004.
IEEE Std 802 11b-1999. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer Specification (PHY): Higher-Speed Physical Layer Extension in the 2.4 GHz Band.
Cheol-Hee Park et al.; “Low-complexity channel estimator for high-rate personal area networks employing CCK modulation”: ICC 2001. 2001 IEEE International Conference on Communications. Conference Record Helsinky, Finland Jun. 2001, pp. 431-434.
Abrishamkar Farrokh
Glazko Seguei A.
Smee John E.
Ha Dac V
Haider Syed
O'Hare James K.
Qualcomm Incorporated
Zhu Peng
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