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Singular-Value-Decomposition

SVD

Singular Value Decomposition (SVD) factorizes any real matrix A into a product of three matrices S, U and V. Matrix S is a diagonal matrix containing the singular values matrix A arranged in descending form. Matrices U and V are orthogonal such as U contains the left singular vectors whereas V contains the right singular vectors. This work uses One Sided Jacobi algorithm to calculate SVD. The Jacobi rotations are calculated on every 2 × 2 submatrix to zero out all non-zero off-diagonal elements of the original matrix. Number of iterations implemented are 5 which are used to converge. The high accuracy of the algorithm can be seen from the error plot.

Error Range

  1. Floating Point function and MATLAB function: 10-16 – 10-15
  2. Floating Point function and Fixed Point function: 10-6 – 10-4

Error Plot

QR Decompostion

Implemented QR Decomposition using Householder Reflections algorithm and Givens Rotations algorithm

Error Plot

n=4

n=5

n=10

References

[1] Ali Ibrahim, Maurizio Valle, Luca Noli and Hussein Chible, Assessment of FPGA Implementations of One Sided Jacobi Algorithm for Singular Value Decomposition. 2015 IEEE Computer Society Annual Symposium on VLSI.

[2] C. Studer, P. Blösch, P. Friedli, and A. Burg, Matrix Decomposition Architecture for MIMO Systems: Design and Implementation Trade-offs. Integrated Systems Laboratory, ETH Zurich, Switzerland.

[3] Z. Liu, K. Dickson and J. V. McCanny, A floating-point CORDIC based SVD processor. DSiP Laboratories, Queen’s University of Belfast, Belfast, N. Ireland. Proceedings of the Application-Specific Systems, Architectures, and Processors (ASAP’03).

[4] D.J. Evans and M. Gusev, Systolic SVD and QR decomposition by Householder Reflections. Intern. J. Computer Math., 2002, Vol. 79(4), pp. 417–439.

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Matrix Decompostion Techniques - SVD and QR Decomposition

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