Characterization of Spatial Reflection Co-efficient for Ground-to-Aircraft and Satellite-to-Aircraft Communication
关键词:
Bistatic radar cross-section, ground-toaircraft, physical optics, radar cross-section, satellite-toaircraft摘要
Because of high sensitivity and long range capability in modern radars, Radar Cross-Section (RCS) is considered to be one of the most important factors in the performance evaluation of stealth technology and for defense applications, especially those that deal with airborne weapon system. In this paper, a concrete relationship is established between RCS and spatial reflection coefficient (SRC) for the two proposed scenarios, i.e., Satellite-to-Aircraft and Ground-to- Aircraft. Geometrical models of the two proposed scenarios are presented for the evaluation of correct incident angles of impinging waves on the surface of aircraft and their corresponding RCS observations. For numerical computation of RCS, a simulation tool POFACET® [1] based upon the methodology of Physical Optics (PO) and a FACET-based aircraft A380 model is used for the designed scenarios. In both the scenarios, the result shows that the aircraft has strong signal reflecting properties which results in the form of RCS to radar receiver or neighboring aircrafts. Further, the RCS results are used to evaluate the spatial reflection coefficients of scattered signal received at any neighboring signal receiving unit. Comparison between RCS and SRC validates that these terms have similar scattering behavior and can be used interchangeably for performance evaluation of communication system models. From the result, it is evident to mention that flying aircrafts are one prominent source of interference which may provide interference to its neighboring aircrafts and as a result degrades their communication performance.
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