A Radio Frequency Identification (RFID) tag IC stores an identifier and a check code. The IC determines whether the stored identifier is corrupted by comparing it to the check code. If the stored identifier does not correspond to the check code then the IC may terminate operation or indicate an error. The IC may also reconstruct the correct identifier from the check code.

A method for cross read mitigation in a monitoring station for vehicles carrying respective wireless tags having tag identifiers includes: receiving, from a first tag sensor disposed to detect wireless tag signals in a first lane of the monitoring station, a first tag read containing a tag identifier; receiving, from a second tag sensor disposed to detect further wireless tag signals in a second lane, adjacent to the first lane, of the monitoring station, a second tag read containing the tag identifier; in response to receiving the first and second tag reads, providing an updated tag detection parameter to each of the first and second tag sensors; receiving, from one of the first and second tag sensors, a third tag read containing the tag identifier; and in response to receiving the third tag read, instructing the one of the first and second tag sensors to report the tag identifier to a monitoring server.

The disclosure describes an RFID system having chip-based novel Simple Random-Access Procedure (SRAP) and Dynamic Simple Random-Access Procedure (DSRAP) tags, and chip-less time and frequency coded tags, for inventory management. The SRAP process contains static (pre-defined) size Frame Structures, and RFID tags compete for network resources by transmitting random preambles to contend for resources to send its Tag-ID to the RFID Reader. The DSRAP process contains dynamic (changing) size Frame Structures and is more efficient than SRAP if the number of tags is lower. The disclosed memory-based variants, save the orthogonal preambles in the tag's memory to reduce the number of transmitted bits and processing necessary to calculate the preambles. To further improve system efficiency and reduce the number of transmitted bits, disclosed memory-based variants may use a pre-defined memory-based modulation (QAM) signal in the memory of the transmitter of the Tags. The disclosure also presents a frequency and time coded chip-less RFID tag system. Each printed chip-less tag has a unique frequency signature, where each chip-less tag's ID is saved in a table in the main memory of the Reader (look-up-table) or in the middleware database. A variable time-delay is added to some chip-less tags to reuse the frequency signatures for a given frame, allowing millions and billions of products to be uniquely identified within a pre-defined time (˜1 sec).

The invention concerns a RFID tag (1) configured to transmit a predetermined code (3K) as a RF backscattered radiation (2) in response to an impinging RF signal (41). The RFID tag (1) is configured to react to an impinging signal at a predetermined reference frequency (23) with a reference backscattered signal (2R). The RFID tag (1) is also configured and to react to an impinging signal (41) at any of a group of transmission frequencies (21, 22) with coding backscattered signals (2F-G) whose amplitudes (20A, 20B) relative to the amplitude (20R) of the reference backscattered signal define the code (3K). The invention further concerns a RFID reader (4), a kit (5) and a method for transmitting a message from a device (1) to a reader (4) as a RF backscattered radiation (2) in response to an impinging RF signal (41).

In some aspects, material processing head can include a body; an antenna disposed within the body; a first tag, associated with a first consumable component, disposed within a flux communication zone of the body at a first distance from the antenna, the first tag having a first resonant frequency; and a second tag, associated with a second consumable component, disposed within the flux communication zone of the body at a second distance from the antenna, the second tag having a second resonant frequency that is different than the first resonant frequency, where the first and second resonant frequencies are tuned based upon at least one of: i) a difference between the first distance and the second distance; or ii) a characteristic (e.g., shape) of the flux communication zone in which the first tag and/or the second tag is disposed.

A wireless tag reading device includes a processor, wherein the processor is configured to: receive one or more pieces of type information, each indicating a type of an article as a search target; read, from a wireless tag storing a piece of type information, the piece of type information; display a position of the wireless tag when the piece of type information read is identical to any of the one or more pieces of type information received; and exclude the wireless tag whose position has been displayed from a display target.

A method for cross read mitigation in a monitoring station for vehicles carrying respective wireless tags having tag identifiers includes: receiving, from a first tag sensor disposed to detect wireless tag signals in a first lane of the monitoring station, a first tag read containing a tag identifier; receiving, from a second tag sensor disposed to detect further wireless tag signals in a second lane, adjacent to the first lane, of the monitoring station, a second tag read containing the tag identifier; in response to receiving the first and second tag reads, providing an updated tag detection parameter to each of the first and second tag sensors; receiving, from one of the first and second tag sensors, a third tag read containing the tag identifier; and in response to receiving the third tag read, instructing the one of the first and second tag sensors to report the tag identifier to a monitoring server.

A method for interleaving time slots in a multi-antenna system for communication with RFID tags is described. An exemplary system has a first RFID interrogator and first and second antennas. The first and second antennas direct signals to and receive signals from respective first and second interrogation zones. A first interrogation signal is transmitted to the first antenna. A first acquire window for receiving a signal from a first RFID transponder is opened after the first interrogation signal. A second interrogation signal is transmitted to the second antenna after the first interrogation signal, and a second acquire window for receiving a signal from a second RFID transponder is opened after the second interrogation signal.

A compartment in a vehicle can be loaded by an object and an operating device having a user interface configured to output at least one output signal on a part of the user interface. The operating device is designed to cover the compartment. The compartment includes a sensing unit configured to detect the presence of the object when at least a part of the object is loaded into the compartment and the operating device includes control circuitry configured to display a digital image of the object on a part of the user interface.

A method for interleaving time slots in a multi-antenna system for communication with RFID tags is described. An exemplary system has a first RFID interrogator and first and second antennas. The first and second antennas direct signals to and receive signals from respective first and second interrogation zones. A first interrogation signal is transmitted to the first antenna. A first acquire window for receiving a signal from a first RFID transponder is opened after the first interrogation signal. A second interrogation signal is transmitted to the second antenna after the first interrogation signal, and a second acquire window for receiving a signal from a second RFID transponder is opened after the second interrogation signal.