Patent ID: 8855568

Claim:
An arrangement for reducing an effect of electromagnetic spurious signals in telecommunications radio frequencies, wherein the electromagnetic spurious signals emanate from fluorescent lamps in an operating environment, the arrangement comprising: a communication unit comprising a radio transmitter, a radio receiver, a set of antennas configured to receive and reflect back radio signals from the communication unit, wherein the reflectance of the radio signals by the antennas differs in different modes; and a control unit adapted to activate a switching of the transmitter or the radio receiver of the communication unit in synchronization with a frequency of the spurious signals emanating from the fluorescent lamps in the operating environment, such that the radio transmitter or the radio receiver is switched off when the spurious signals have a strength not less than a predetermined value, wherein the control unit is coupled to a same power supply that powers the fluorescent lamps, and wherein the spurious signals are synchronous with a frequency of electric energy produced by the power supply, such that the power supply produces a multi-phase voltage and the control unit either activates the switching of the transmitter or receiver at each phase or part of each phase.