Patent ID: 9621300
Date: 2017-04-11
CPC Classifications: H04B,H04K

Claim:
1. A communications system comprising an electronic countermeasures (ECM) signal transmission arrangement for generating and transmitting an ECM signal, a first controller operable to control the ECM transmission arrangement such that the transmitted ECM signal takes a pulsed form having a pulse rate including a plurality of first periods in which the ECM signal is transmitted separated by second periods in which the ECM signal is not transmitted, a radio signal receiver arrangement including or forming a bandpass filter and arranged to receive a radio signal, and a second controller operable such that during a plurality of third periods the radio signal is processed by at least part of the radio receiver arrangement, the third periods being separated by fourth periods in which the radio receiver arrangement does not process the radio signal, wherein the first and second controllers are synchronised such that the second periods are synchronised with the third periods, at the radio signal receiver arrangement such that the radio signal processed by the receiver arrangement is reconstituted in the bandpass filter into a continuous signal, free or substantially free of ECM interference, the radio signal processed by at least part of the radio receiver arrangement comprising a pulsed signal having the pulse rate that is greater than a bandwidth of the bandpass filter.