The Information-Theoretic Limits for the Performance of X-ray-Source Based Navigation (Xnav) and X-ray Communication (Xcom)

D.G. Jablonski

Abstract:	The Information-theoretic concepts of the Cramer- Rao lower bound, Fisher information, and Shannon entropy are used to describe the fundamental concepts that underlie X-ray Source Based Navigation (Xnav) and X-ray Communication (Xcom). By adopting this approach, we are able to connect the fundamental theories associated with the use of signals from X-ray pulsars for spacecraft navigation to the use of man-made X-ray signals for communication between spacecraft. This will better enable exploitation of the unique properties of Xnav and Xcom for secure communications and for autonomous deep space navigation using small physical size optics.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	1458 - 1466
Cite this article:	Jablonski, D.G., "The Information-Theoretic Limits for the Performance of X-ray-Source Based Navigation (Xnav) and X-ray Communication (Xcom)," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 1458-1466.
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