Time-dependent phase error correction using digital waveform synthesis
| DWPI Title: Radar system for correcting phase error in radar waveform, has phase accumulator that applies time domain correction parameter to digital signal, such that digital signal is pre-distorted to correct time-dependent phase error |
| Abstract: The various technologies presented herein relate to correcting a time-dependent phase error generated as part of the formation of a radar waveform. A waveform can be pre-distorted to facilitate correction of an error induced into the waveform by a downstream operation/component in a radar system. For example, amplifier power droop effect can engender a time-dependent phase error in a waveform as part of a radar signal generating operation. The error can be quantified and an according complimentary distortion can be applied to the waveform to facilitate negation of the error during the subsequent processing of the waveform. A time domain correction can be applied by a phase error correction look up table incorporated into a waveform phase generator. |
| Use: Radar system for correcting phase error in radar waveform. |
| Advantage: The correcting parameter facilitates pre-distorting the waveform to compensate for the at least one characteristic deleteriously affecting the waveform during generation of the radar signal. |
| Novelty: The system has a direct digital synthesis (DDS) circuit having a phase accumulator (140). The accumulator determines a time domain correction in a time domain phase error (198) correction look up table (PEC LUT) based upon the characteristic of the time-dependent phase error received from a corrector component (192) and applies the time domain correction parameter to the digital signal, such that the digital signal is pre-distorted to correct the time-dependent phase error induced in the analog signal by an amplifier (197). |
| Filed: 10/4/2013 |
| Application Number: US14045993A |
| Tech ID: SD 11977.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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