Single RF oscillator single-side band modulation for RFID readers using tone insertion during reader reception
US7107022B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2005 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | May 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C2200/007
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmitter upconverts a SSB data signal during a first operational mode using a RF upconverting signal having a frequency that is offset from a center frequency of a channel (ωC) by an amount that depends on the data signal's SSB bandwidth (ωM). In a second operational mode, the transmitter upconverts a tone signal having a frequency ωM using the same RF upconverting signal. The upconverted tone signal can be used as a continuous wave (CW) carrier signal having a frequency ωC. The transmitter has a single RF oscillator to output both a SSB signal centered at frequency ωC during the first mode and a carrier signal of frequency ωC during the second mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.