A master communication device causes a slave communication device connected to the master communication device to perform a distance measurement communication for measuring a distance between a terminal and a vehicle that wirelessly communicates with the terminal. The master communication device notifies a controller connected to the master communication device of a first result of the distance measurement communication performed by the slave communication device. The master communication device further notifies the controller of a second result of the distance measurement communication performed by the master communication device. The vehicle is permitted to be actuated in response to any one of the first result or the second result indicating that the distance is valid.

The present invention relates to a system, a transponder, a position detection apparatus, and a method for a photographic object detection system. The method comprises providing a position detection apparatus connectable to an image capturing apparatus; and providing a transponder having an identity. The method further comprises determining a position of the transponder relative the position detection apparatus, generating transponder data comprising the identity of the transponder, and generating a signal indicative of the position of the transponder relative an image frame of the image capturing apparatus.

The present invention relates to a system, a transponder, a position detection apparatus, and a method for a photographic object detection system. The method comprises providing a position detection apparatus connectable to an image capturing apparatus; and providing a transponder having an identity. The method further comprises determining a position of the transponder relative the position detection apparatus, generating transponder data comprising the identity of the transponder, and generating a signal indicative of the position of the transponder relative an image frame of the image capturing apparatus.

A system for calibrating an array antenna comprises a calibration antenna at a first location relative to an array antenna, a first set of calibration files, and a processor. Based on received far field data from a far field data test that was run on the array antenna, using the calibration antenna, the processor is configured to generate a model predicting the actual location of the calibration antenna relative to the array antenna and to generate predicted far field data based on the model. The model is adjusted, if needed, by comparing the predicted far field data with the received far field data. Based on the model, new calibration files are generated that substantially correlate to the actual location of the calibration antenna.

A system for calibrating an array antenna comprises a calibration antenna at a first location relative to an array antenna, a first set of calibration files, and a processor. Based on received far field data from a far field data test that was run on the array antenna, using the calibration antenna, the processor is configured to generate a model predicting the actual location of the calibration antenna relative to the array antenna and to generate predicted far field data based on the model. The model is adjusted, if needed, by comparing the predicted far field data with the received far field data. Based on the model, new calibration files are generated that substantially correlate to the actual location of the calibration antenna.

Methods, systems, and devices for wireless communications are described. In some aspects, two devices may support signaling and messaging designs that support bandwidths that are greater than 160 MHz for ranging null data packets (NDPs). For example, various signaling and messaging designs may support a use of a 320 MHz bandwidth for ranging NDPs as part of a ranging measurement procedure, which may offer greater resolution than narrower bandwidths. The signaling and messaging designs may include one or more updates for a null data packet announcement (NDPA) frame, for a trigger frame, for session negation messages (such as one or both of an initial fine timing measurement (IFTM) frame and an IFTM request (IFTMR) frame), for segmentation techniques for ranging NDPs, or for any combination thereof.

A system is provided and includes a receiver and an access module. The receiver is configured to receive a signal transmitted from a portable access device to a vehicle. The access module is configured to generate a differentiated signal based on the received signal, up-sample the differentiated signal to generate a first up-sampled signal, up-sample an expected signal to generate a second up-sampled signal, cross-correlate the first up-sampled signal and the second up-sampled signal to generate a cross-correlation signal, determine, based on the cross-correlation signal, a phase difference between the first up-sampled signal and the second up-sampled signal, determine a round trip time of the signal received by the receiver based on the phase difference, and permit access to the vehicle based on the round trip time.