LEO satellites Based Doppler Positioning Using Distributed nonlinear Estimation

RSVP for LEO satellites

The Internet Engineering Task Force (IETF) is working on extending the traditional TCP/IP model for supporting multimedia and real-time applications on the Internet. Thus, new protocols have been developed such as the Resource Reservation Protocol (RSVP). At the same time, there has been a growing interest in using Low Earth Orbit (LEO) satellites. In the near future, when the Internet with mul...

calibration of phased array of reflector antennas using leo satellites

detection of stealth targets calls for employment of high-power radars which itself relies on usage of high-gain antennas like large parabolic reflectors. in the past few years, using of an array with many small reflectors instead of a large reflector antenna has been considered. this method provides enhanced eirp by a factor of n2 where n is the number of array antennas. regarding improvement ...

Beam Patterns of Low Frequency Radio Antennas using LEO Satellites

Minimum Hardware Navigation Concept for Leo Satellites Using Information Fusion

Improved operational autonomy is required for the operation of any single satellite within a LEO satellite network. One onboard function, which is an interesting candidate to be implemented with an increased level of onboard autonomy is apparently the navigation function, which is in charge of the determination of the instantaneous satellite orbital position and attitude. This paper aims to dem...

CPM Neural Network Based Receiver for LEO Satellites

In this paper it is described the development of a receiver for GMSK signals based on the use of neural networks. Two cases are described: one in which the linear approximation of the GMSK signal is employed and other where phase changes are detected. Wide implementation, training and result differences are between both methods and they are described in the paper. The first approach is simpler ...