Filter structure and method

Abstract From the Canadian patent

Multiported register files are employed to implement the input delays necessary for finite impulse response (FIR) filter operation. A multiported register file is a memory, typically small, with at least one read port and one write port. Data written into the multiported register file may be read out therefrom in anydesired order. The multiported register file may have additional output ports from which the data stored therein may be read out also in any desired order, and, independent from the order of any other output port. At least one output of eachmultiported register file is coupled to the input of the next stage of the FIR filter if, any. In addition, each multiported register file …