Compound surface acoustic wave matched filters
US4506239A · kind A · utility
9Cited by
8References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1982 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Oct 25, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/6416
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Compound surface acoustic wave matched filters comprise chirp-biphase and biphase code multiplex transducer pairs on piezoelectric substrates. Both alternatives offer significantly improved processing gain when compared with conventional biphase filters. The advantage is realized by convolving the correlation peak of the chirp or biphase input transducer on the response of the conventional biphase output transducer, thus achieving a large processing gain with a minimum number of transducer electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.