Soft-demodulation based waveform repair for signals undergoing spectral suppression
AssigneeL3Harris Technologies, Inc.
InventorsChristian Schlegel, L. Andrew Gibson, Jr., Evan D. Poff, Edwin R. Twitchell, David R. Keller, Lance Lindsay
Life of this patent
Estimating the term…
Abstract
Systems and methods for waveform repair. The methods comprise: receiving a signal of interest having a spectral distortion, the signal of interest having a sequence of symbols; generating an estimate for each symbol of a sequence of symbols in the signal of interest; and applying reconstruction filtering to the estimates to correct the spectral distortion.
Claims15
A method for waveform repair, comprising:
- receiving a signal of interest having a spectral distortion, the signal of interest having a sequence of symbols;
- performing band-rejection filtering to remove interference from the signal of interest;
- generating an estimate for each symbol of a sequence of symbols in the signal of interest;
- and
- applying reconstruction filtering to the estimates to correct the spectral distortion, wherein the reconstruction filtering is applied to the estimates to demodulate a portion of the signal of interest which was removed by the band-rejection filtering.
A circuit, comprising:
- a soft symbol demodulator configured to generate an estimate for each symbol of a sequence of symbols in a received signal of interest having a spectral distortion;
- a frequency excision module configured to perform band-rejection filtering to remove interference from the signal of interest;
- and
- a reconstruction filter configured to apply reconstruction filtering to the estimates to correct the spectral distortion;
- wherein the reconstruction filtering is applied to the estimates to demodulate a portion of the signal of interest which was removed by the band-rejection filtering.
A non-transitory computer-readable medium that stores instructions that, when executed by at least one computing device, will cause the at least one computing device to perform operations comprising:
- receiving a signal of interest having a spectral distortion, the signal of interest having a sequence of symbols;
- performing band-rejection filtering to remove interference from the signal of interest;
- generating an estimate for each symbol of a sequence of symbols in the signal of interest;
- and
- applying reconstruction filtering to the estimates to correct the spectral distortion, wherein the reconstruction filtering is applied to the estimates to demodulate a portion of the signal of interest which was removed by the band-rejection filtering.
Dependencies are inferred from the claim text.