Chip-scale radio-frequency localization devices and associated systems and methods
摘要
說(shuō)明書(shū)
As another example, in some embodiments, a receive-only interrogator may obtain information indicative of the distance between the receive interrogator and the target device, but may not be configured to complete processing this information to determine an estimate of the distance. Rather, the receive-only interrogator may provide this information to the master interrogator 1432 for further processing, and the master interrogator 1432 may complete processing of this information to derive an estimate of the distance between the receive-only interrogator and the target device. To this end, master interrogator 1432 may include circuitry (e.g., a processor, an ADC, etc.) for performing such processing. For example, in some embodiments, a receive-only interrogator may generate a mixed RF signal indicative of the distance between the interrogator and the target device by mixing the RF signal received from a target device with a local version of the RF signal transmitted by the master interrogator, that has been transformed in a manner analogous to the processing performed by the target device (e.g., by passing the local version of the RF signal through a frequency multiplier), and may provide the mixed RF signal to the master interrogator for further processing. Alternatively, the receive only-interrogator may sample the mixed RF signal and provide raw ADC counts to the master interrogator. In other embodiments, each receive-only interrogator as well as the master interrogator may provide information indicative of the distance between the receive interrogator and the target device to a separate processor (e.g., a processor not part of any interrogator device and, for example, on a separate semiconductor die) for further processing.
