Patent ID: 8207825

Claim:
A radio frequency identification (RFID) reader comprises: a transmitter section that includes: an oscillation module coupled to convert a reference oscillation into a radio frequency (RF) oscillation; a power amplifier module coupled to amplify and to modulate the RF oscillation in accordance with outbound modulation information to produce an outbound RF signal; a receiver section that includes: a clock recovery circuit coupled to generate at least one local oscillation (LO) signal from the outbound RF signal; a preprocessing module operable to process an inbound RF signal to produce a preprocessed inbound RF signal, wherein the outbound RF signal is at a first carrier frequency and the inbound RF signal is at a second carrier frequency and wherein the preprocessed inbound RF signal includes a desired RF signal component and a blocking RF signal component and wherein the blocking RF signal component includes a component of the outbound RF signal at a first carrier frequency; a mixing module coupled to mix the preprocessed inbound RF signal with the at least one LO signal to produce a down converted signal; a post processing module operable to process the down converted signal to produce a baseband signal, wherein the post processing module includes one or more low pass filters operable to filter the in-phase component of the down converted signal and the quadrature component of the down converted signal to produce a desired near baseband signal; and an analog to digital conversion module coupled to convert the baseband signal into an encoded inbound signal.