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Phase Unwrapping Using Reconfigurable Hardware, Sherman Braganza, Miriam Leeser, W. C. Warger Ii, C. M. Warner, C. A. Dimarzio
Phase Unwrapping Using Reconfigurable Hardware, Sherman Braganza, Miriam Leeser, W. C. Warger Ii, C. M. Warner, C. A. Dimarzio
Charles A. DiMarzio
The most computationally intensive part of the minimum LP Norm phase unwrapping algorithm[1] (its kernel) is the 2D Discrete Cosine Transform(DCT) that computes the variable p in the equation Qp=c using the Preconditioned Conjugate Gradient (PCG) method. The separability of the DCT means that the 2D transform can be decomposed into a series of 1D DCTS that compute the transforms of the rows followed by the transforms of the columns. Furthermore, the DCT can be expressed in terms of a Fast Fourier Transform (FFT), which allows the hardware implementation to use a pre-designed FFT core. This poster presents a design …