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A Submarine Based System for Radio Direction Finding and Communications Intelligence

This paper gives an overview of the recently completed development and production of an ultra-compact system for submarine applications. In particular it highlights some of the technical capabilities on the front-end side. The system consists of a compact direction finding (DF) and monitoring antenna with a high pressure radome and the respective onboard DF receivers and processing equipment. Despite being very compact, the system covers a wide frequency range from MF/HF to UHF. Some of the antenna design aspects are presented and constraints for the DF resulting from the small array aperture are discussed. The importance of having DF capabilities for communications intelligence is highlighted. The DF system features a number of advanced capabilities that are as yet non-standard in a wideband reconnaissance context. Chief among these are elevation angle of arrival estimation, simultaneous DF for vertical and horizontal polarizations as well as estimation of co-channel signals. These capabilities are motivated and examples are provided

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Signals Intelligence - Processing - Analysis - Classification  (nur auf Englisch verfügbar)

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