A Systolic VLSI Architecture for Complex SVD
Hemkumar, Nariankadu D.
Cavallaro, Joseph R.
cyclic Jacobi method; complex SVD; VLSI; Brent-Luk-VanLoan
A systolic algorithm for the SVD of arbitrary complex matrices, based on the cyclic Jacobi method with "parallel ordering" is presented. A novel two-step, two-sided unitary transformation scheme, tailored to the use of CORDIC algorithms for high speed arithmetic, is employed to diagonalize a complex 2x2 matrix. Architecturally, the complex SVD array is modeled on the Brent-Luk-VanLoan array for real SVD. An expandable array of O(nÂ²) complex 2x2 matrix processors computes the SVD of an nxn matrix in O(n log n) time. A CORDIC architecture for the complex 2x2 processor with an area complexity twice that of a real 2x2 processor is proposed. Computation time for the complex SVD array is less than three times that for a real SVD array with a similar CORDIC based implementation.
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