Optimal Factoring of FIR Filters
AssigneeAlan N. Willson, Jr.
InventorsAlireza Mehrnia, Alan N. WILLSON, JR.
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Abstract
A method and system for the design and implementation of an optimally factored filter is presented. Pairs of angle values are organized in pairing candidates and a threshold is defined to indicate an upper bound on the number of pairing candidates. A first pairing candidate is exchanged above the threshold with a second pairing candidate below the threshold and a matrix is generated based on the pairing candidates below the threshold. A lowest predicted total quantization cost between all pairing candidates represented within the matrix is determined and the pairing candidates that result in the lowest predicted total quantization cost are used to determine the coefficients of the filter.
Claims16
A method, performed by a processing device, of determining factors of a filter, the method comprising:
- organizing pairings of angle values into pairing candidates;
- defining a threshold to indicate an upper bound on the number of pairing candidates;
- exchanging a first pairing candidate above the threshold with a second pairing candidate below the threshold;
- generating a matrix based on the pairing candidates below the threshold;
- determining a lowest predicted total quantization cost between all pairing candidates represented within the matrix;
- and
- using the pairing candidates that result in the lowest predicted total quantization cost to determine the coefficients of the filter.
Dependencies are inferred from the claim text.