Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-09-20
2005-09-20
Deppe, Betsy L. (Department: 2637)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S150000, C375S346000, C375S347000, C370S342000
Reexamination Certificate
active
06947474
ABSTRACT:
The architecture of the present invention is premised upon an algorithm involving integration of oblique correlators and RAKE filtering to null interference from other spread spectrum signals. The oblique correlator is based on the non-orthogonal projections that are optimum for nulling structured signals such as spread spectrum signals. In one configuration, space spanned by a first signal associated with a first emitter is orthogonal to an interference space associated with one or more signals of one or more other emitters. RAKE filtering is used to rapidly steer the beam of the multi-antenna system and to mitigate the effects of multipath.
REFERENCES:
patent: 4852166 (1989-07-01), Masson
patent: 5272695 (1993-12-01), Makino et al.
patent: 5309232 (1994-05-01), Hartung et al.
patent: 5566167 (1996-10-01), Duttweiler
patent: 6177893 (2001-01-01), Velazquez et al.
patent: 0 642 243 (1993-04-01), None
patent: PCT/US98/17278 (1998-08-01), None
Schlegel et al.; “Multiuser Projection Receivers”;IEEE Journal on Selected Areas in Communications, vol. 14, No. 8; Oct. 1996; pps. 1610-1618.
Schlegel et al.; “Coded Asynchronous CDMA and Its Efficient Detection”;IEEE Transactions on Information Theory, vol. 44 No. 7; Nov. 1998; pps. 2837-2847.
Schlegel et al.; “A New Projection Receiver for Coded Synchronous multi-User CDMA Systems”; p. 318.
Alexander et al.; “A Linear Receiver for Coded multiuser CDMA”,IEEE Transactions on Communications, vol. 45 No. 5; May 1997; pps. 605-610.
Schlegel et al.; “Projection Recevier: A New Efficent Multi-User Detector”;IEEE; May 1995; pp. 142-145.
Behrens; “Subspace Signal Processing in Structured Noise”;UMI Dissertation Services; 1990; 145 pages.
U.S. Appl. No. 10/141,999, filed May 5, 2002, Kober et al.
Kober Wolfgang
Thomas John K.
Vis Marvin L.
Deppe Betsy L.
Shattil Steven J.
TensorComm, Inc.
LandOfFree
Rake receiver for spread spectrum signal demodulation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rake receiver for spread spectrum signal demodulation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rake receiver for spread spectrum signal demodulation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3413986