Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2007-09-04
2009-06-23
Bayard, Emmanuel (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S349000
Reexamination Certificate
active
07551698
ABSTRACT:
Techniques for deriving eigenvectors based on steered reference and used for spatial processing. A steered reference is a pilot transmission on one eigenmode of a MIMO channel per symbol period using a steering vector for that eigenmode. The steered reference is used to estimate both a matrix Σ of singular values and a matrix U of left eigenvectors of a channel response matrix H. A matrix Ũ with orthogonalized columns may be derived based on the estimates of Σ and U, e.g., using QR factorization, minimum square error computation, or polar decomposition. The estimates of Σ and U (or the estimate of Σ and the matrix Ũ) may be used for matched filtering of data transmission received via a first link. The estimate of U or the matrix Ũ may also be used for spatial processing of data transmission on a second link (for reciprocal first and second links).
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Gaal Peter
Ketchum John W.
Wallace Mark S.
Bayard Emmanuel
Franks Ross L.
QUALCOMM Incorporated
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