The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, we provide an analysis of fixed-position communication nodes in a network for maintaining availability during robot exploration of unknown environments. Based on realistic wireless propagation models in different environments, the communication path loss as the robot moves is characterized. The nodes are then described, and we discuss a simple scalable policy for their deployment. The...
Maintaining network availability is critical to teams of mobile unmanned ground vehicles (UGV) and requires a realistic mobility model for accurate calculation. Mobile ad-hoc networks (MANET) have been extensively studied using the random waypoint mobility model. But to more exactly model teams of unmanned systems and their relative positions, we provide a model of communication states using the reference...
Small receivers can use dual polarization antennas to maximize received energy from single polarization transmitters. This paper analyzes the performance of these asymmetric MIMO antenna configurations in polarized, uncorrelated Rayleigh fading channels. Because the receiver can have knowledge of the channel's cross polar ratio, a polarization reciprocity scheme is developed. This is shown to maximize...
Wireless sensor networks (WSN) that require bridging to other networks or extending sensor coverage must keep high link availability to reduce energy wasted on error control. This paper first details the relationship of individual link probability of availability to Eb/No and to upper protocol layers. Then the efficient computation of the network probability of availability is shown, and applied to...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.