Direct demodulation method and apparatus
US6011816A · kind A · utility
13Cited by
12References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1996 |
| Grant date | Jan 4, 2000 |
| Priority date | — |
| Expiry date | Sep 18, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/1525
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A demodulation circuit providing for detection of multiple zero-crossings in an FSK signal. High data rate signals are demodulated by generating, for each pair of baseband signals I and Q, additional I and Q pairs which are phase shifted from the original I and Q pair. By generating zero crossing signals for the original baseband signals and for the phase shifted signals, additional zero crossings may be detected allowing demodulation of relatively high data rate modulated signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.