Systems and methods for reducing narrow bandwidth interference contained in broad bandwidth signals

A system for processing a group of signals and interference, the system comprising:

• (a) an analog-to-digital (A/D) converter configured to digitize the group of signals and the interference;
• (b) a Fourier transform circuit coupled to the A/D converter and configured to obtain a Fourier transform of the digitized group of signals and the interference and to provide as output spectral bins, each bin having a power level, at least some of the bins respectively containing portions of the digitized group of signals, and at least one of the bins containing the interference;
• (c) a power analysis circuit configured to compare the collective power level of the spectral bins output by the Fourier transform circuit to a fixed, predetermined threshold, and if the collective power level exceeds the fixed, predetermined threshold, to excise at least one bin that contains the interference such that the collective power level following excision does not exceed the fixed, predetermined threshold and is sufficiently low to maintain linear operation of the system;
• and
• (d) an inverse Fourier transform circuit configured to obtain an inverse Fourier transform of the remaining spectral bins and to provide as output a digitized group of signals less the interference in any excised spectral bin.