Multiplex communications – Communication over free space – Combining or distributing information via code word channels...
Reexamination Certificate
2006-09-12
2006-09-12
Shah, Chirag (Department: 2616)
Multiplex communications
Communication over free space
Combining or distributing information via code word channels...
C370S335000, C370S441000, C375S148000
Reexamination Certificate
active
07106719
ABSTRACT:
A code division multiple access user equipment is used in receiving a plurality of data signals over a shared spectrum. Each received data signal experiences a similar channel response. A combined signal of the received data signals is received over the shared spectrum. The combined signal is sampled at a multiple of the chip rate. A channel response is estimated. A column of a channel correlation matrix is determined using the estimated channel response. A spread data vector is determined using the determined column, the estimated channel response, the received combined signal and a fourier transform. Data of the data signals is estimated using the spread data vector.
REFERENCES:
patent: 5157688 (1992-10-01), Dell-Imagine
patent: 5377225 (1994-12-01), Davis
patent: 5377226 (1994-12-01), Davis
patent: 5477225 (1995-12-01), Young et al.
patent: 5648983 (1997-07-01), Kostic et al.
patent: 6064689 (2000-05-01), Vollmer et al.
patent: 2002/0126619 (2002-09-01), De et al.
patent: 2002/0126646 (2002-09-01), De et al.
patent: 2002/0131383 (2002-09-01), De et al.
patent: 2002/0136160 (2002-09-01), De et al.
patent: 2002/0141366 (2002-10-01), De et al.
patent: 2002/0141372 (2002-10-01), De et al.
patent: 2002/0141373 (2002-10-01), De et al.
patent: 2002/0145989 (2002-10-01), De et al.
patent: 2002/0154599 (2002-10-01), De et al.
patent: 2002/0154619 (2002-10-01), De et al.
patent: 2002/0159383 (2002-10-01), De et al.
patent: 2002/0159428 (2002-10-01), De et al.
Benvenuto N. et al. “Joint Detection With Low Computational Complexity For Hybrid TD-CDMA Systems” VTC 1999-Fall. IEEE VTS 50th. Vehicular Technology Conference. Gateway to the 21st Century Communications Village. Amsterdam, Sep. 19-22, 1999, IEEE Vehicular Technology Conference, NY.
Vandaele P. et al. Recursive Total Least Squares Algorithm for Sincle-User Blind Channel Equalisation: IEE Proceedings: Vision, Image and Signal Processing, Institution of Lectrical Engineers, FB, vol. 147, No. 3, Jun. 23, 2000.
Weidong Yang et al., “Fast Joint Detection with Cyclic Reduction Exploiting Displacement Structures”, 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing, Istanbul, Turkey, Jun. 5-9. Proceedings ( Cat. No. 00CH37100).
Proakis John G., Digital Signal Processing, Macmillan Publishing Company, New York, NY, 1992, p. 835, para. 11.3.1, p. 890, para. 12.3.2.
Vollmer et al., “Joint-Detection Using Fast Fourier Transforms in TD-CDMA based Mobile Radio Systems”, International Annual Conference of ICT, 1999, pp. 1-7, p. 1, para. I, p. 2, para. II, p. 3, para III, p. 4, para IV.
Pigeonnat Y., “Alternative Solutions for Joint Detection in TD/CDMA Multiple Access Scheme for UMTS”, IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, May 9, 1999, pp. 329-332, p. 329, para. 2.
Ramjee Prasad, Werner Mohr and Walter Konhauser editors,Third Generation Mobile Communication Systems, Artech House, Boston, 2000.
Anja Klein, Ghassan Kawas Kaleh and Paul Walter Baier, “Zero Forcing and Minimum Mean-Square Error Equalization for Multiuser Detection in Code-Division Multiple-Access Channels”,IEEE Trans. on Vehicular Technology, vol. 45, No. 2, pp. 276-287, May 1996.
Naja Klein, “Data Detection Algorithms Specially Designed for the Downlink of CDMA Mobile Radio Systems”,IEEE 47th Vehicular Technology Conference, pp. 203-207, May 1997.
H.R. Karimi and N.W. Anderson, “A Novel and Efficient Solution to Block-Based Joint-Detection using Approximate Cholesky Factorization”,Personal, Indoor and Mobile Communications PIMRC' 98, Conference Proceedings, vol. 3, pp. 1340-1345, Sep. 1998, Boston, MA.
ETSI STC SMG2 Layer 1 Expert Group, “Low Cost MMSE-BLE-SD Algorithm for UTRA TDD Mode Downline”, Tdoc SMG2 UMTS L1, Helsinki, Finland, Sep. 1998.
3G TS 25.102 V3.4.0, Oct. 2000, “Utra(TDD)Radio Transmission and Reception”, 3rd Generation Partnership Project, Technical Specification Group RAN WG4, Annex B., pp. 37.
Lang Tong; Guanghan xu; Kailath T: “Blind identification and equalization based on second -order statistics: a time domain approach”, IEEE Trans. Inf. Theory (USA), IEEE Transactions on Information Theory, Mar. 1994, USA, ISSN 0018-9448, vol. 40, NR 2, pp. 340-349.
Yang et al., “Fast Joint Detection with Cyclic Reduction Exploiting Displacement Structures”, 2000 IEEE International Conference on Acoustics, Speech and Signal Processing, Istambul, Turkey, Jun. 2000.
De Parthapratim
Misra Raj Mani
Pan Jung-Lin
Zeira Ariela
InterDigital Technology Corporation
Shah Chirag
Volpe and Koenig P.C.
Wilson Robert W.
LandOfFree
Single user detection user equipment does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Single user detection user equipment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single user detection user equipment will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3572105