Arrangement for measuring the lag between two timed signals by electronic correlation
US4053888A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1976 |
| Grant date | Oct 11, 1977 |
| Priority date | — |
| Expiry date | Oct 5, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/325
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An arrangement for measuring by correlation the lag produced by the transmission of a coded signal through a delaying medium and which permits a high signal-to-noise ratio and high accuracy. The received coded signal is applied to two correlators followed by a subtractor to form a discriminator circuit utilized to lock the frequency of a generator which provides two reference coded signal utilized respectively for correlation and to form an automatic tracking loop. The lag measurement is obtained by state-decoding of the transmission coded signal and of one of the reference coded signal and by pulse counting at a period sub-multiple of the bit period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.