Importance

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Abstract

Interrogators, wireless communication systems, methods of operating an interrogator, methods of operating a wireless communication system and methods of determining range of a remote communication device are provided. According to a first aspect, an interrogator includes communication circuitry configured to output a plurality of wireless signals toward a radio frequency identification device and to receive a plurality of wireless signals from the radio frequency identification device; and a processor coupled with the communication circuitry and configured to determine a range of the radio frequency identification device relative to the interrogator responsive to the received wireless signals. A method of operating an interrogator of another aspect includes outputting a plurality of wireless signals toward a radio frequency identification device; receiving a plurality of wireless signals 1s from the radio frequency identification device; and determining range of the radio frequency identification device relative to the interrogator after the receiving.

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First Claim