Hava Platformundan RF Kaynak Konumlandırma

Abstract

The concept of electronic warfare, which aims to establish dominance over the electromagnetic spectrum, restrict the spectrum usage of adversary forces and ensure effective spectrum utilization by friendly forces, is gaining increasing importance over time. RF electronic support systems, which are part of the electronic warfare concept, are seen as critical systems used for purposes such as the detection, parameter determination, and positioning of RF sources. Determining the locations of RF sources enables the identification of adversary forces’ electronic order of battle, providing operational superiority both in strategic and tactical fields. Despite the advantages it offers, there are challenges in locating positions through a passive system. Essentially, the process of determining a location is based on comparative data. The use of single or multiple platforms to obtain the data for comparison shapes the location determination approach. When evaluated in the context of aerial platforms, it is known that the simultaneous operation of multiple platforms is costly, and approaches allowing location determination from a single platform are often preferred. Among the location determination approaches from a single platform, the use of bearing lines is frequently observed. In recent years, direct location estimation methods are also being investigated. Within the scope of the thesis, direct location estimation methods based on Doppler frequency rate of change and phase difference rate of change have been examined. Both methods work comparatively based on the dynamics of the platform containing the electronic support system and the parameters of the received signal. The comparison process is conducted based on the temporal changes of the measured parameters. When the obtained rate of change information is combined with the dynamics of the platform at a common point, the direction and distance of the RF transmission source can be determined. The use of the determined direction and distance information allows the direct determination of the regional position of the transmission source.