Patent ID: 6134570
Filing Date: 2000-10-17
Classification: H03H

Abstract:
A method for performing multirate filtering, comprising:a. calculating a second coefficient value comprising:i) obtaining an error value;ii) obtaining a data value from a data register;iii) multiplying the data value and the error value to obtain a coefficient product;iv) adding a first coefficient value from a coefficient register; andv) adding the first coefficient value to the coefficient product to produce the second coefficient value; andb. calculating a second convolution value during a convolution period comprising:i) multiplying the data value and the first coefficient value to produce a convolution product;ii) adding a convolution input to the convolution product to produce the second convolution value;repeating steps a and b wherein the data value is obtained by incrementing the data register by one to produce a second data value as the data value, and the first coefficient value is obtained by incrementing the coefficient register by M to produce an Mth coefficient value as the first coefficient value.