Intelligent Automation, Inc. — Department of Defense SBIR Phase I: SB151-005

Description

The cancellation of non-cooperative interfering sources is of vital interest to military communications that have experienced, and will continue to experience, disruptions through intentional (electronic warfare) and unintentional interference. In the absence of knowledge about the interfering signals, communication systems treat interference and noise equally, and ignore the fact that these two are fundamentally different. For a single receiver, noise and interference are added together and if the interference signal occupies the entire band-width of the desired signal it is practically impossible for the receiver to distinguish between the noise and the interference. The situation is completely different when there is more than one receiver with cooperative capability in radio range of the interfering sources. The interference signals that are received by two (or more) receivers are correlated, and hence there is a clear opportunity for intelligent collaboration among the receivers to cancel interfering signals. To address this opportunity , we propose to develop an interference cancellation technique.