CDMA transceiver techniques for wireless communications

Multiplex communications – Communication over free space – Combining or distributing information via code word channels...

Reexamination Certificate

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C375S148000, C375S329000

Reexamination Certificate

active

07873021

ABSTRACT:
The present invention is related to a method for multi-user wireless transmission of data signals in a communication system having at least one base station and at least one terminal where for a plurality of users have robustness to frequency-selective fading added to the data to be transmitted, then grouping data symbols into blocks formed by demultiplexing a serial-to-parallel operation, and spreading and scrambling a portion of the obtained blocks of data, followed by combining spread and scrambled portions of the blocks, adding transmit redundancy to the combined spread and scrambled portions which is then transmitted.

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: 6804307 (2004-10-01), Popovic
patent: 6834043 (2004-12-01), Vook et al.
patent: 6891897 (2005-05-01), Bevan et al.
patent: 6917821 (2005-07-01), Kadous et al.
patent: 6937292 (2005-08-01), Patel et al.
patent: 6990137 (2006-01-01), Smee et al.
patent: 2001/0028637 (2001-10-01), Abeta et al.
patent: 2001/0046255 (2001-11-01), Shattil
patent: 2002/0191568 (2002-12-01), Ghosh
patent: 2003/0016640 (2003-01-01), Onggosanusi et al.
patent: 2003/0165187 (2003-09-01), Tesfai et al.
patent: 2004/0022179 (2004-02-01), Giannakis et al.
patent: 2004/0057530 (2004-03-01), Tarokh et al.
patent: 2004/0081263 (2004-04-01), Lee et al.
patent: 2004/0082356 (2004-04-01), Walton et al.
patent: 2004/0120274 (2004-06-01), Petre et al.
patent: 2004/0240527 (2004-12-01), Giannakis et al.
patent: 2004/0248527 (2004-12-01), Park et al.
patent: 2005/0135314 (2005-06-01), Giannakis et al.
patent: 2006/0039331 (2006-02-01), Abeta et al.
patent: 2007/0104282 (2007-05-01), Vihriala
patent: 1 128 592 (2001-08-01), None
patent: 1 357 693 (2003-10-01), None
Leus; Signal Processing Algorithms for CDMA-Based Wireless Communications (p. 147); Thesis May 2000.
Giannakis, et al., “Space-time coding for broadband wireless communications”, Wireless Communications and Mobile Computing, vol. 1, pp. 35-53, (2001).
Mudulodu, et al., “A blind multiuser receiver for the CDMA downlink”, IEEE, pp. 2933-2936, (2000).
Petré, et al., “Space-time chip equalizer receivers for WCDMA downlink with code-multiplexed pilot and soft handover”, IEEE, pp. 280-284, (2001).
Wang, et al., “Linearly precoded or coded OFDM against wireless channel fades?”, Third IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, Taoyuan, Taiwan, pp. 267-270, Mar. 20-23, 2001).
International Search Report dated Aug. 4, 2003 for European Patent Application No. EP 03 44 7096.
Al-Dhahir, Naofal, “Single-carrier frequency-domain equalization for space-time block-coded transmission over frequency-selective fading channels”, IEEE Communications Letters, vol. 5, No. 7, pp. 304-306, (Jul. 2001).
Giannakis, et al., “AMOUR-generalized multicarrier transceivers for blind CDMA regardless of multipath”, IEEE Transactions on Communications, vol. 48, No. 12, pp. 2064-2076, (Dec. 2000).
Huang, et al., “Achieving high data rates in CDMA systems using BLAST techniques”, Proceedings Global Telecommunications Conference, IEEE, vol. 5, pp. 2316-2320, (Nov. 1999).
Li, et al., “Transmitter diversity for OFDM systems and its impact on high-rate data wireless networks”, IEEE Journal on Selected Areas in Communications, vol. 17, No. 7, pp. 1233-1243, (Jul. 1999).
Zhou, et al., “Chip-interleaved block-spread code division multiple access”, IEEE Transactions on Communications, vol. 50, No. 2, pp. 235-248, (Feb. 2002).
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.
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.
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.
G. Leus, “Signal Processing Algorithms for CDMA-Based Wireless Communications” (2000) Ph.D. Thesis KULeuven.
Gesbert et al., “Blind Multiuser MMSE Detector for CDMA Signals in ISI Channels”, (1999) IEEECommunications Letters, vol. 3, No. 8, pp. 233-235.
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.
Ghauri et al. “Linear Receivers for the DS-CDMA Doenlink Exploting Orthogonality of Spreading Sequences”, (1998) IEEE vol. 1, pp. 650-654.
Ghauri et al., “Blind and Semi-blind Single User Receiver Techniques for Asynchronous CDMA in Multipath Channels”, (1998) IEEE, pp. 3572-3577.
Holma et al., “WCDMA for UMTS”, (2001) Wiley.
Honig et al., “Multiuser CDMA Receivers”, (2000) IEEE Signal Processing Magazine, vol. 17, No. 3, pp. 49-63.
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.
J. Proakis, “Digital Communicationsl”, (1995) McGraw-Hill, 3rd edition.
Klein, “Data Detection Algorithms Specially Designed for the Downlink of CDMA Mobile Radio Systems”, (1997) IEEE, pp. 203-207.
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.
Milstein, “Wideband Code Division Multiple Access”, (2000) IEEE Journal on Selected Areas in Communication, vol. 18, No. 8, pp. 1344-1354.
Petre et al., “Extended MMSE Receiver for Multiuser Interference Rejection in Multipath DS-CDMA Channels”, (1999) Vehicular Technology Conference, vol. 3, pp. 1840-1844.
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.
Price et al., “A Communication Technique for Multipath Channels”, (1958) IRE, vol. 46, pp. 555-570.
S. Haykin, “Adoptive Filter Theory”, (1996) Prentice Hall, 3rd edition.
S. Verdu, “Multiuser Detection”, (1998) Cambridge University Press.
Tsatsanis et al., “Performance Analysis of Minimum Variance CDMA Receivers”, (1998) IEEE Transactions on Signal Processing, vol. 46, No. 11, pp. 3014-3022.
Tsatsanis, “Inverse Filtering Criteria for CDMA Systems”, (1997) IEEE Transactions on Signal Processing, vol. 45, No. 1, pp. 102-112.
Vauhan, “Polarization Diversity in Mobile Communications”, (1990) IEEE Transactions on Vehicular Technology, vol. 39, No. 3, pp. 177-186.
Wang et al., “Blind Equalization and Multiuser Detection in Dispersive CDMA Channels”, (1998) IEEE Transactions on Communications, vol. 46, No. 1, pp. 91-103.
Office Action dated Dec. 31, 2008 for U.S. Appl. No. 1

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