System for identifying objects

摘要

The identification system includes a transceiver (1) and at least one transponder (30) with a memory device (33,34) The memory device stores the transponder identification code. An identification signal is generated (35-38) which represents the identification code. The identification signal is modulated by the bits constituting the identification code. The transceiver receives and interprets (8-12) the identification signal. The transponder has a variable code generator (32) and a variable code is written (31) into the memory device so the variable code constitutes at least part of the identification code. The variable code can be a random or pseudo-random code.