Low cost binary phase shift keying modulation transmitter system
US5859869A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1995 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Nov 17, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0491
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improvement in spread spectrum modulator systems, and more particularly further improvements in spread spectrum BPSK, or Binary Phase Shift Keying, Modulation systems, the present invention contemplating the utilization of an exclusive OR logic gate to replace an RF mixer stage in the SS transmitter, thereby providing enhanced gain at a lower energy consumption, with lesser cost and suppressed carrier output when compared to prior systems, as well as compatibility with CMOS low power logic modulation drive circuitry. The present system teaches a new, superior, and less costly BPSK transmitter than contemplated by the prior art, providing a less complicated system while outputting increased gain over prior art modulators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.