Tailored response cascaded integrator comb digital filter and methodology for parallel integrator processing

A method of performing a pre-decimated cascaded integration in a filter section, comprising the steps of:

• changing the data rate of data being received by an integrator structure;
• performing a first integration procedure on data received at the changed data rate, wherein the first integration procedure includes at least one recursive integrator stage;
• executing a second integration procedure on data output by said first integration procedure, wherein the second integration procedure includes a plurality of parallel recursive integrator stages;
• and
• outputting data equivalent to data that would be output by a post-decimated cascaded integrator having an equal number of integrator stages.

A method of performing a pre-decimated cascaded integration in a filter section, comprising the steps of:

• changing the data rate of data being received by an integrator structure;
• performing a first integration procedure on data received at the changed data rate, wherein the first integration procedure includes at least one recursive integrator stage and wherein said performing step further comprises modifying the received data by multiplication by determined coefficients;
• executing a second integration procedure on data output by said first integration procedure, wherein the second integration procedure includes at least one additional recursive integrator stage;
• and
• outputting data equivalent to data that would be output by a post-decimated cascaded integrator having an equal number of integrator stages.

A pre-decimated integrator filter section, comprising:

• a data rate change component;
• and
• a first integrator structure comprising at least one recursive integrator stage, said first integrator structure receiving data at a rate established by said data rate change component, said first integrator structure modifying data received from said data rate change component by applying coefficients stored in a look-up table;
• wherein the pre-decimated integrator filter section outputs data equivalent to data that would be output by a post-decimated integrator filter section having an equal number of integrator stages.

A pre-decimated integrator filter section, comprising:

• a data rate change component;
• and
• a first integrator structure comprising a plurality of reduced rate parallel signal paths with a recursive integrator stage and a plurality of coefficient multipliers for each path, said first integrator structure receiving data at a rate established by said data rate change component, said first integrator structure modifying data received from said data rate change component;
• wherein the pre-decimated integrator filter section outputs data equivalent to data that would be output by a post-decimated integrator filter section having an equal number of integrator stages.