1. A processing system for generating filtered digital touch capacitance data, the processing system comprising: a sigma-delta converter configured to: receive a first resulting signal with a first capacitive sensing electrode of a plurality of capacitive sensing electrodes, and apply sigma-delta conversion to the first resulting signal to generate a first sigma-delta quantized signal; and a filter logic unit configured to apply a first matched filter to the sigma-delta quantized signal to generate a first filtered sigma-delta quantized signal.