Error recovery in RFID reader systems

A method for an RFID reader system to output a code of a first RFID tag, comprising:

• receiving from the tag a first wave;
• decoding from the first wave a first version of the code;
• determining whether a fidelity criterion regarding the first version is met;
• and
• if so, outputting the first version of the code,
• else if not, deriving from the first version a final version of the code that is different from the first version, and outputting the final version instead of the first version.

An RFID reader system comprising:

• receiving means for receiving from an RFID tag a first wave;
• decoding means for decoding from the first wave a first version of a code of the tag;
• determining means for determining whether a fidelity criterion regarding the first version is met;
• deriving means for deriving from the first version a final version of the code that is different from the first version, and
• outputting means for outputting the first version of the code if the fidelity criterion is met regarding the first version, and the final version instead of the first version otherwise.

An article comprising:

• a memory having instructions stored thereon, in which when the instructions are executed by an operational processing block, they result in:
• determining whether a fidelity criterion is met regarding a first version of a tag code decoded from a first wave received from an RFID tag;
• and
• if so, outputting the first version of the code, else if not, deriving from the first version a final version of the code that is different from the first version, and outputting the final version instead of the first version.