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 RP 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 (ωA). In a second operational mode, the transmitter upconverts a tone signal having a frequency ω 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.