Methods and Apparatus for Localizing a Source of a Set of Radio Signals

摘要

Methods and apparatus are provided for localizing a source of a set of radio signals, such as radio signals received from an RFID tag at various locations. A source of a set of radio signals (such as radio signals received from an RFID tag at various locations) is localized by obtaining a plurality of radio signals in the set from a different location in an environment; determining a magnitude and received location for each of the plurality of radio signals; determining a direction for each of the plurality of radio signals by comparing each given radio signal to other radio signals in the set; and determining a location of the source of the set of radio signals by determining an intersection of the direction for each of the plurality of radio signals. The direction for each of the plurality of radio signals optionally comprises a net directional vector determined using a weighted circular mean.

主权项

1. A method for localizing a source of a set of radio signals, the method comprising the steps of:
obtaining a plurality of radio signals in said set from a different location in an environment, wherein each of said plurality of radio signals is transmitted by said source; determining a magnitude and received location for each of said plurality of radio signals; determining a direction for each of said plurality of radio signals by comparing each given radio signal to other radio signals in said set; and determining a location of said source of said set of radio signals by determining an intersection of said direction for each of said plurality of radio signals, wherein at least one of said steps are performed by at least one hardware device.