| 主权项 |
1. A method comprising:
receiving a wireless data packet signal from a transmitter, the data packet signal including a data packet, the data packet including payload data and further information; determining from received signal strength values of the data packet signal first information related to a sequence of received signal strength levels of the data packet signal; extracting the further information from the received data packet; determining, based on the further information included in the data packet, second information related to a sequence of expected signal strength levels; and determining whether the first information corresponds to the second information.
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