System and process for shared frequency source multi-band transmitters and receivers
US6415001B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1998 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Dec 1, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication system for communicating RF signals at any one of a plurality of communication standards through a common antenna is disclosed. The communication system comprises a transmitting unit, a receiving unit, an IF LO frequency generator, an RF LO frequency generator, a reference source, and an antenna. The transmitting unit has a transmit RF information signal output, a modulator for transforming a transmit baseband information signal into a modulated transmit IF information signal, and an upconverter for upconverting the transmit IF information signal into a transmit RF information signal. The receiving unit has a receive RF information signal input, a first downconverter for downconverting a receive RF information signal to a first receive IF information signal, a second downconverter for downconverting the first receive IF information signal to a second receive IF information signal, an analog-to-digital converter for converting the second receive IF information signal to a receive digital information signal, and a digital signal processor for digitally filtering the receive digital information signal. By selecting expedient IF LOs and RF LOs, the IF LO and RF LO frequ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.