Multi-mode radio transceiver
US4731796A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1987 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Jun 19, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/0052
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multi-mode radio transceiver comprising a sequence of bi-directional circuit modules including a radio frequency input/output amplifier module (1), a radio frequency/baseband I and Q quadrature channel conversion module (2), an analogue/digital conversion module (3), a digital signal processor (4,5), and a digital signal input/output interface (6), with a control means (7) whereby for transmission a radio frequency signal is formed from analogue quadrature I and Q channel components of a digitized signal at baseband and translated to the radio transmission frequency and for reception the radio frequency signals are transformed into I and Q quadrature analogue components at baseband and subsequently digitized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.