Single RF oscillator single-side band modulation for RFID readers using tone insertion during reader reception

摘要

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 (ω_C) by an amount that depends on the data signal's SSB bandwidth (ω_M). In a second operational mode, the transmitter upconverts a tone signal having a frequency ω_M using the same RF upconverting signal. The upconverted tone signal can be used as a continuous wave (CW) carrier signal having a frequency ω_C. The transmitter has a single RF oscillator to output both a SSB signal centered at frequency ω_C during the first mode and a carrier signal of frequency ω_C during the second mode.