Wideband Active Interference cancellation techniques for military applications

Deploying Counter IED jammers, Electronic Warfare (EW) systems, on tactical vehicles has significantly improved the survivability of personnel and platform against the threat of IEDs. However, EW systems, operating in close proximity to or co-located with the friendly Communication Systems have also produced inadvertent adverse effects on the communications. There have been numerous reports about such impact of electromagnetic interference between friendly systems. The challenges are: a) proliferation of EW systems at the individual platform level and b) the threat, or RF triggering devices often occupying similar frequency ranges as the Communication systems, i.e., on-channel jamming. Therefore, achieving electromagnetic compatibility (EMC) or suppressing the electromagnetic interference (EMI) effect between jammers and friendly RF systems is of paramount in term of both technical complexity and operational importance to the Army from the point of view of operational impact and technical complexity. This paper will briefly discuss various technologies, techniques, and approaches which have been exploited and employed to mitigate the undesirable EMI as a part of integrated effort. However, the majority of discussion will be on Active Interference cancellation technology and technique which would eventually yield the enduring and adaptable capability.