Detection of burst signal transmissions
US4943974A · kind A · utility
123Cited by
14References
68Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1988 |
| Grant date | Jul 24, 1990 |
| Priority date | — |
| Expiry date | Oct 21, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70709
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is disclosed for detecting the presence of and synchronizing to burst transmissions which contain repeated acquisition codes. The received signal is applied as an input to a surface acoustic wave (SAW) filter which is matched to detect one repetition of the code. The SAW filter correlation output is sampled at times corresponding to the times of arrival of each repetition of the code. The mean value and variance of the correlation values for each repetition are computed, and the system declares an acquisition when the mean value and variance meet certain criteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.