Patent ID: 11922250
Assignee: CORNELL UNIVERSITY
Field: Telecommunications (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 9:
10. A method for collaborative RFID reading across a plurality of RFID readers, comprising:
assigning a first code to a first RFID reader having a first baseband frequency;
producing a first encoded signal from the first RFID reader using the first code;
broadcasting the first encoded signal from the first RFID reader;
assigning a second code, different from the first code, to a second RFID reader having the first baseband frequency;
producing a second encoded signal from the second RFID reader using the second code;
broadcasting the second encoded signal from the second RFID reader;
receiving, at an RFID tag, at least one of the first encoded signal or the second encoded signal and generating, responsive thereto, a response signal;
receiving the response signal at the first RFID reader, the second RFID reader, or both the first RFID reader and the second RFID reader; and
decoding the response signal, when received at the first RFID reader, via the first code or the second code and decoding the response signal, when received at the second RFID reader, via the second code or the first code,
wherein the act of producing the first encoded signal from the first RFID reader using the first code comprises producing a first CDMA-encoded signal,
wherein the act of broadcasting the first encoded signal from the first RFID reader comprises broadcasting the first CDMA-encoded signal from the first RFID reader,
wherein the act of producing the second encoded signal from the second RFID reader using the second code comprises producing a second CDMA-encoded signal, and
wherein the act of broadcasting the second encoded signal from the second RFID reader comprises broadcasting the second CDMA-encoded signal from the second RFID reader.