Patent ID: 7831647
Filing Date: 2010-11-09
Classification: H03H,H04B

Abstract:
1. A finite impulse response (FIR) filter, comprising: a first multiplier that receives an input signal and a first tap coefficient; a first delay element that receives said input signal and that provides a fixed delay; a second multiplier that receives a second tap coefficient and an output of said first delay element; a variable delay element that receives said input signal and that provides a variable delay; M delay elements that provide said fixed delay, wherein a first one of said M delay elements receives an output of said variable delay element and remaining ones of said M delay elements receive an output of a preceding one of said M delay elements, where M is an integer greater than one; and M multipliers, wherein said M multipliers receive outputs of respective ones of said M delay elements and respective ones of M tap coefficients; and a plurality of summers that sum outputs of said first, second and M multipliers.