Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Reexamination Certificate
2005-11-23
2010-10-19
Do, Chat C (Department: 2193)
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
Reexamination Certificate
active
07818357
ABSTRACT:
A CORDIC processor is configured to perform orthogonal or oblique CORDIC projections in order to cancel interference in a received signal. The CORDIC projection can be used to rotate an interference signal vector so that its only non-zero component is in the last Euclidean coordinate of the representative vector. A measurement vector is then subject to the same rotations as the interference vector. As a result of the rotation on the measurement vector, all components of the measurement vector parallel to the interference vector will be resolved onto the same coordinate as the rotated interference vector. The parallel components of the symbol vector can be cancelled by zeroing that coordinate, and the modified measurement vector can then be rotated back to its original coordinates, to produce an orthogonally projected version of the original measurement vector. Typically, the projection is onto a subspace that is orthogonal or oblique to an interference subspace, which may be one-dimensional.
REFERENCES:
patent: 3479579 (1969-11-01), Baker, Jr.
patent: 5317753 (1994-05-01), Kuenemund et al.
patent: 5384573 (1995-01-01), Turpin
patent: 6212668 (2001-04-01), Tse et al.
patent: 6647067 (2003-11-01), Hjelm et al.
patent: 6954530 (2005-10-01), Gunther
patent: 2005/0015418 (2005-01-01), Chang et al.
patent: 2005/0041725 (2005-02-01), De Rivaz
patent: 2006/0029171 (2006-02-01), Jensen
patent: 2006/0056550 (2006-03-01), Skraparlis
patent: 2006/0093070 (2006-05-01), Ibrahim et al.
patent: 2006/0115079 (2006-06-01), Heiman
patent: 2006/0285531 (2006-12-01), Howard
patent: 2006/0291550 (2006-12-01), Wang
XILINX DS249 Product Specification, Apr. 28, 2005, www.xilinx.com, p. 11.
H. Dawid et al, “Digital Signal Processing for Multimedia Systems, Chapter 24: CORDIC Algorithms and Architectures,” (1999).
R.T. Behrens, L.L. Scharf,“Signal Processing Applications of Oblique Projection Operators,” IEEE Trans. On Signal Processing 42(6), 1413-1424.
S. Hsioa and J. Delosme, “Parallel Singular Value Decomposition of Complex Matrices Using Multidimensional CORDIC Algorithms,” IEEE Trans. On Signal Processing, 44(3), 685-697.
Barcelo, Harrison & Walker LLP
Do Chat C
Hughes Kevin
Rambus Inc.
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