A METHOD AND SYSTEM FOR PRODUCING A JAMMER SIGNAL

摘要

A distributed antenna system (5) with a plurality of remote radio units (15a-c) is disclosed. The distributed antenna system (5) includes a jammer signal generator (17a-c, 27, 117a-c) for generating a jammer signal (55) in at least one frequency range to be blocked on detection of an uplink signal in a coverage area, as well as at least one antenna element (10a-c) for transmitting the generated jammer signal (55) in the coverage area. The jammer signal (55) will ensure that any mobile devices or stations (40) within the coverage area are unable to transmit radio signals as the frequency range(s) on which the radio signals should be transmitted are blocked by the jammer signal (55).