Derivation of eigenvectors for spatial processing in MIMO...

Details Derivation of eigenvectors for spatial processing in MIMO... Derivation of eigenvectors for spatial processing in MIMO...

2007-10-09

2007-10-09

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S349000

Reexamination Certificate

active

10729070

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).

REFERENCES:
patent: 7039001 (2006-05-01), Krishnan et al.
patent: 2006/0023666 (2006-02-01), Jalali et al.
patent: 101 62 548 (2003-07-01), None

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