Patent ID: 11942069
Assignee: RENESAS DESIGN NETHERLANDS B.V.
Field: Other consumer goods (Other fields)
Classification: CPC G | IPC G

Claim 12:
13. A computer system comprising:
a module configured as an automated feedforward filter design tool configured to design a feedforward filter for an active noise cancelling system prior to physically implementing physical circuit components and parameters of the feedforward filter within the active noise cancelling system by automatically determining, by a processor, a filter transfer function of the feedforward filter that is achievable using physical circuit components and parameters wherein:
the filter transfer function is determined using a least square method;
the least square method is a weighted least square method such that the error function is dependent on a weighting vector; and
determining the filter transfer function comprises:
defining a target transfer function of the feedforward filter
defining an error function that is dependent on the target transfer function and the filter transfer function; and
applying the least square method using the target transfer function to determine a filter expression for the filter transfer function by applying the least square method using the error function to determine the filter expression for the filter transfer function that either:
i) reduces the error function to a sufficiently small value that is indicative of the filter transfer function being sufficiently close to the target transfer function; and/or
ii) minimizes the error function.