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Scaled and decoupled Cholesky and QR decompositions with application to spherical MIMO detection | IEEE Conference Publication | IEEE Xplore

Scaled and decoupled Cholesky and QR decompositions with application to spherical MIMO detection


Abstract:

Motivated by the need for the Cholesky factorization in implementing a spherical MIMO detector, this paper considers Cholesky and QR decompositions suitable for fixed-poi...Show More

Abstract:

Motivated by the need for the Cholesky factorization in implementing a spherical MIMO detector, this paper considers Cholesky and QR decompositions suitable for fixed-point implementation. In particular, we reformulate the decompositions to avoid the many square-root and division operations required in their natural form. This is achieved by decoupling the numerator and denominator calculations and applying scaling by powers of 2 (corresponding to bit shifts) to ensure numerical stability in the recursions. We consider the impact on the spherical detector formulation.
Date of Conference: 16-20 March 2003
Date Added to IEEE Xplore: 28 May 2003
Print ISBN:0-7803-7700-1
Print ISSN: 1525-3511
Conference Location: New Orleans, LA, USA

References

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