Pulse or digital communications – Equalizers
Reexamination Certificate
2006-11-15
2009-11-24
Bocure, Tesfaldet (Department: 2611)
Pulse or digital communications
Equalizers
C375S350000, C708S323000
Reexamination Certificate
active
07623571
ABSTRACT:
A method and system for retrieving a desired user data symbol sequence from a received signal are disclosed. In one embodiment, the method includes i) receiving a channel modified version of a transmitted signal comprising a plurality of user data symbol sequences, each being encoded with a user specific known code, ii) determining an equalization filter directly and in a deterministic way from the received signal and iii) applying the equalization filter on the received signal to thereby retrieve the transmitted signal.
REFERENCES:
patent: 5461640 (1995-10-01), Gatherer
patent: 5862186 (1999-01-01), Kumar
patent: 6301298 (2001-10-01), Kuntz et al.
patent: 6426972 (2002-07-01), Endres et al.
patent: 6522683 (2003-02-01), Smee et al.
patent: 6580750 (2003-06-01), Aue
patent: 6665545 (2003-12-01), Raleigh et al.
patent: 6671334 (2003-12-01), Kuntz et al.
patent: 6801565 (2004-10-01), Bottomley et al.
patent: 6937292 (2005-08-01), Patel et al.
patent: 6990137 (2006-01-01), Smee et al.
patent: 2001/0046255 (2001-11-01), Shattil
patent: 2002/0191568 (2002-12-01), Ghosh
patent: 2003/0165187 (2003-09-01), Tesfai et al.
patent: 2007/0104282 (2007-05-01), Vihriala
Milstein, “Wideband Code Division Multiple Access”, (2000) IEEE Journal on Selected Areas in Communication, vol. 18, No. 8, pp. 1344-1354.
Tsatasnis, “Inverse Filtering Criteria for CDMA Systems”, (1997) IEEE Transactions on Signal Processing, vol. 45, No. 1, pp. 102-112.
Tsatasnis et al., “Performance Analysis of Minimum Variance CDMA Receivers”, (1998) IEEE Transactions on Signal Processing, vol. 46, No. 11, pp. 3014-3022.
Wang et al., “Blind Equalization and Multiuser Detection in Dispersive CDMA Channels”, (1998) IEEE Transactions on Communications, vol. 46, No. 1, pp. 91-103.
Ghauri et al., “Blind and Semi-blind Single User Receiver Techniques for Asynchronous CDMA in Multipath Channels”, (1998) IEEE, pp. 3572-3577.
Petre et al., “Extended MMSE Receiver for Multiuser Interference Rejection in Multipath DS-CDMA Channels”, (1999) Vehicular Technology Conference, vol. 3, pp. 1840-1844.
Gesbert et al., “Blind Multiuser MMSE Detector for CDMA Signals in ISI Channels”, (1999) IEEECommunications Letters, vol. 3, No. 8, pp. 233-235.
Honig et al., “Multiuser CDMA Receivers”, (2000) IEEE Signal Processing Magazine, vol. 17, No. 3, pp. 49-63.
Klein, “Data Detection Algorithms Specially Designed for the Downlink of CDMA Mobile Radio Systems”, (1997) IEEE, pp. 203-207.
Frank et al., “Adaptive Interference Suppersion for Direct-Sequence CDMA Systems with Long Spreading Codes”, (1998) Allerton Conference on Communication, Control and Computing, pp. 411-420.
Ghauri et al. “Linear Receivers for the DS-CDMA Doenlink Exploting Orthogonality of Spreading Sequences”, (1998) IEEE vol. 1, pp. 650-654.
Krauss et al. “Simple MMSE Equalizers for CDMA Downlink to Restore Chip Sequence: comparison to Zero-forcing and Rake”, (2000) IEEE, pp. 2865-2868.
Krauss et al., “Blind Channel Identification on CDMA Forward Link Based on Dual Antenna Receiver at Hand-Set and Cross-Relation”, (1999) IEEE, pp. 75-79.
Li et al., “A New Blind Receiver for Downlink DS-CDMA Communications”, (1999) IEEE Communications Letters, vol. 3, No. 7, pp. 193-195.
Mudulodu et al., “A Blind Multiuser Receiver for the CDMA Downlink”, (2000) IEEE, pp. 2933-2936.
Vauhan, “Polarization Diversity in Mobile Communications”, (1990) IEEE Transactions on Vehicular Technology, vol. 39, No. 3, pp. 177-186.
Correal et al., “Enhanced DS-CDMA Uplink Performance Through Base Station Polarization Diversity and Multistage Interference Cancellation”, (1998) IEEE, pp. 1905-1910.
Fantacci, “An Efficient RAKE Receiver Architecture with Pilot Signal Cancellation for Downlink Communications in DS-CDMA Indoor Wireless Networks”, (1999) IEEE Transactions on Communications, vol. 47, No. 6, pp. 823-827.
Gesbert et al., “On-Line Blind Multichannel Equalization Based on Mutually Referenced Filters”, (1997) IEEE Transactions on Signal Processing, vol. 45, No. 9, pp. 2307-2317.
Petre et al., “Pilot-aided Adaptive Chip Equalizer Receiver for Interference Suppression in DS-CDMA Forward Link”, Vehicular Technology Conference, (2000) vol. 1, pp. 303-308.
Buzzi et al., “Channel Estimation and Multiuser Detection in Long-Code DS/CDMA Systems”, (2001) IEEE Journal on Selected Areas in Communications, vol. 19, No. 8, pp. 1476-1487.
S. Verdu, “Multiuser Detection”, (1998) Cambridge University Press.
Holma et al., “WCDMA for UMTS”, (2001) Wiley.
S. Haykin, “Adoptive Filter Theory”, (1996) Prentice Hall, 3rd edition.
J. Proakis, “Digital Communicationsl”, (1995) McGraw-Hill, 3rd edition.
Price et al., “A Communication Technique for Multipath Channels”, (1958) IRE, vol. 46, pp. 555-570.
G. Leus, “Signal Processing Algorithms for CDMA-Based Wireless Communications” (2000) Ph.D. Thesis KULeuven.
Hooli et al., “Multiple Access Interference Suppression with Linear Chip Equalizers in WCDMA Downlink Receiversl” (1999) Globecom, vol. General Conference (Part A), pp. 467-471.
Leus, “Signal processing algorithms for CDMA-based wireless communications”,Thesis(2000) pp. 1-231.
Office Action issued on Apr. 2, 2009 in U.S. Appl. No. 10/424,543, filed Apr. 25, 2003.
Leus Geert
Moonen Marc
Petré Frederik
Bocure Tesfaldet
IMEC
Knobbe Martens Olson & Bear LLP
Williams Lawrence B
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