Programmable digital pulse shaping phase modulator
US5446760A · kind A · utility
8Cited by
12References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1992 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Aug 31, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03866
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital pulse shaping and phase modulation network is used for reducing out-of-band spectral energy. This network is used in conjunction with a NCO (numerically controlled oscillator) which includes a linear phase input port. This circuit converts rectangular data pulses into a user programmed shape. The shape pulses are then modulated onto the carrier via the linear phase port. Depending on the preprogrammed pulse shape, the out-of-band spectral energy is significantly reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.