Patent ID: 8320504

Claim:
A system for removing interference from a composite received baseband signal comprising: a receive decimation filter configured to accept the composite received baseband signal and generate filtered sampled data at a decimation rate wherein the composite received baseband signal comprises a desired signal and an interfering signal; a transmit decimation filter configured to accept a digitally converted replica of the interfering signal and generate filtered sampled data at a decimation rate; an integer sample delay control (ISDC) coupled to the transmit decimation filter and configured to provide multiple sample delay control for the replica of the interfering signal and store an estimated delay value; an adaptive filter coupled to the integer sample delay control and configured to provide fractional sample delay control for the replica of the interfering signal and optimize cancellation of the interfering signal present in the composite received baseband signal; a digital phase-locked loop (DPLL) coupled to the receive decimation filter and the adaptive filter and programmed with a known frequency offset of the interfering signal configured to track a phase and frequency of the replica of the interfering signal; an automatic gain control (AGC) coupled to the adaptive filter and configured to maintain near full scale operation of adaptive filtering and the DPLL; and a slicer configured to act as a subtractor wherein the slicer coupled to a mixer and a delay unit form an error estimator.