The system associates at least one transponder (T1-T5) with cells (Z1-Z4) that differ in their variable or permanently different electromagnetic field characteristics. The transponder(s) is used to evaluate the characteristics of the electromagnetic fields received by the cells and to perform the association according to the characteristics of the individually received fields or the ratio of the components of selectively or resultant received fields or the component dominant in field strength. Independent claims are also included for a base station and for a transponder for a system for spatial association of transponder(s) with cells of detection area.
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