Self calibrated act pulse compression system
US5552793A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1994 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Dec 2, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A self-calibrating pulse compression system which is able to optimally compress a chirped waveform notwithstanding variations in the chirped spectrum due to changes in transmitter characteristics or other factors. In a most general sense, the inventive pulse compression system includes a first circuit (12, 14) for providing a first waveform, a second circuit (16, 30, 32) for sampling the first waveform at predetermined time intervals to provide a plurality of calibration samples, a third circuit (30) for storing the calibration samples; and fourth circuit (16, 28, 30) for multiplying a second waveform by the stored calibration samples. In a specific implementation, the first circuit of the self-calibrating pulse compression system includes an impatt chirp transmitter (12). The output of the transmitter (12) is fed to an antenna (18) and to a first switch (22) by a circulator (20). The switch (22) is controlled by a timing circuit (16) which may be implemented with software in a host computer. The output signal of switch (22) is downconverted and input to a tapped delay line (28). In the best mode, the tapped delay line is implemented with an acoustic charge transport device (ACT). …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.