of states mandating - Modified givens rotations for inverse updating in qr decomposition

Complex-to-real data reduction and application of a conventional complex Givens Rotations matrix is known, such as described in a book entitled “Adaptive Filter Theory, 4Edition” by Ali Sayed, published by John Wiley in 2003, at pages 804-807.

One or more aspects generally relate to a modified Givens rotation.

More particularly, one or more aspects relate to directly performing a Givens rotation on a complex matrix.

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