Systems and methods for variable rate conversion

Details Systems and methods for variable rate conversion Systems and methods for variable rate conversion

2011-04-05

2011-04-05

Williams, Howard (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Data rate conversion

C708S313000

Reexamination Certificate

active

07920078

ABSTRACT:
Poly-phase filters are used to offer an efficient and low complexity solution to rate conversion. However, they suffer from inflexibility and are not easily reconfigured. A novel design for rate converters employ poly-phase filters but utilize interpolation between filter coefficients to add flexibility to rate conversion. This interpolation can be implemented as an interpolation of the poly-phase filter results. Additional approximations can be made to further reduce the amount of calculations required to implement a flexible rate converter.

REFERENCES:
patent: 4954824 (1990-09-01), Yamada et al.
patent: 5274372 (1993-12-01), Luthra et al.
patent: 5619270 (1997-04-01), Demmer
patent: 7102547 (2006-09-01), Jensen
patent: 7167112 (2007-01-01), Andersen et al.
patent: 7280878 (2007-10-01), Rossum
patent: 7391933 (2008-06-01), Wang et al.
patent: 7397858 (2008-07-01), Garrido et al.
patent: 7577307 (2009-08-01), Hou
patent: 2002/0140853 (2002-10-01), Yang et al.
patent: 2009/0319065 (2009-12-01), Risbo
Timo I. Laakso, Vesa Valimaki, Matti Karjalainen, Unto K. Laine, “Splitting: Tools for fractional delay filter design: The Unit Delay”, IEEE Signal Processing Magazine, Jan. 1996, pp. 30-60.
U Seng Pan, R.P. Martins, J.E. Franca, “Intermittent Polyphase SC Structures For FIR Rational Interpolation”, 1997 IEEE International Symposium on Circuits and Systems, Jun. 9-12, 1997, pp. 125-124.
Andrew I. Russell, “Efficient Rational Sampling Rate Alteration Using IIR Filters”, IEEE Signal Processing Letters, Jan. 2000, pp. 6-7, vol. 7 No. 1.
Chia-Chuan Hsiao, “Polyphase Filter Matrix for Rational Sampling Rate Conversion”, 1987, pp. 2173-2176, Codex Corporation, MS C1-40, 20 Cabot Blvd., Mansfield, MA 02048.
A. Tkacenko, “Variable Sample Rate Conversion Techniques for the Advanced Receiver”, IPN Progress Report 42-168, Feb. 15, 2007, pp. 1-33.
Cleve Moler, “Interpolation”, Numerical Computing with MATLAB, Feb. 15, 2008, Chapter 3, pp. 1-27, The Mathworks, Society for Industrial and Applied Mathematics, USA.

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