The disclosure relates to range-determining-module for a transceiver, configured to: receive a signal comprising a received-data-packet, identify a plurality of known-sequence-sections of the received-data-packet, each known-sequence-section containing a known-data-sequence that is known to the range-determining-module; determine a reception-time-stamp associated with each of the plurality of known-sequence-sections; verify the received-data-packet using the reception-time-stamps associated with different respective known-sequence-sections of the received-data-packet; and provide a verified range estimate in accordance with one or more of the time stamps of the verified received-data-packet.