Iterative fast fourier transform error correction

Details Iterative fast fourier transform error correction Iterative fast fourier transform error correction

2006-04-11

2006-04-11

Chin, Stephen (Department: 2634)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S148000, C375S340000

Reexamination Certificate

active

07027489

ABSTRACT:
Data is to be estimated from a received plurality of data signals in a code division multiple access communication system. The data signals are transmitted in a shared spectrum at substantially a same time. A combined signal of the transmitted data signals are received over the shared spectrum and sampled. A channel response for the transmitted data signals is estimated. Data of the data signals is estimated using the samples and the estimated channel response. The data estimation uses a Fourier Transform based data estimating approach. An error in the data estimation introduced from a circulant approximation used in the Fourier Transform based approach is iteratively reduced.

REFERENCES:
patent: 5793814 (1998-08-01), Baier et al.
patent: 6072947 (2000-06-01), Roychowdhury et al.
patent: 6144711 (2000-11-01), Raleigh et al.
patent: 6154443 (2000-11-01), Huang et al.
patent: 6177906 (2001-01-01), Petrus
patent: 6798737 (2004-09-01), Dabak et al.
patent: 6879578 (2005-04-01), Pan et al.
patent: 6885654 (2005-04-01), Pan et al.
patent: 00/77942 (2000-12-01), None
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. 267-287, 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.
Ramjee Prasad et al.Third Generation Mobile Communication Systems, Artech House, Boston, 2000.
Anja Klein et al, “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.
Ania Klein et al, “Data Detection Algorithms Specially Designed for the Downlink of CDMA Mobile Radio Systems,”IEEE 47thVehicular Technology Conference, pp. 203-207, May 1997.
H.R. Karmimi et al. “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, Sept. 1998, Boston, MA.
ETSI STC SMG2 Laver 1 Expert Group, “Low Cost MMS-BLE-SD Algorithm for UTRA TDD Mode Downline,” Tdoc SMG2 UMTS L1, Heisinki, Finland, Sept. 1998.
3G TS 25.102 V3.4.0, 2000-10, “UTRA (TDD) Radio Transmission and Reception,”3rdGeneration Partnership Project, Technical Specification Group RAN WG4, Annex B., pp.37.
Das et al., “Computationally Efficient Mulituser Detectors”, Personal, Indoor and Mobile Radio Communications, IEEE, Sept. 1997, vol. 1, pp.62-67.

Affiliated with

Also associated with

Rating

Iterative fast fourier transform error correction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Iterative fast fourier transform error correction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Iterative fast fourier transform error correction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3529461