Abstract-This paper addresses the use of distributed coherent communication techniques across a wireless network of tactical radios to enable extended-range communications. Conventional tactical communication systems providing multikilometer terrestrial ranges utilize large and costly manpack or vehicular-mount radios. In this paper we discuss techniques for distributing the transmit functions coherently across a network of small, low-power squad radios to achieve similar ranges. We present a testbed implementation of these techniques and overthe-air demonstrations of coherent distributed transmit communications at 3.5 km standoff and 1.25Mbps data rates using radios operating with under 20dBm of transmit power each. *
ABST.'.CTFabrication of the 100 mm diameter, 3 mm thick lithiumcompensated silicon, Si(Li1, detectors for the Cosmic Ray Isotope Spectrometer (CFUS) instrument on board the ACE satellite required development oE new float-zone silicon growing techniques, new Si(Li) fabrication procedures, and new particle beam testing sequences.These developments are discussed and results are presented that illustrate the advances made in realizing these CRIS Si(Li) detectors, which, when operational in the CFUS detector telescopes, will usher in a new generation of cosmicray isotope spectrometers.In order to determine the abundances of the rare nuclides in this m g e the instrument requires both a large geometrical acceptance to achieve an adequate statistical sample and excellent mass resolution to separate rare species fiom abundant isotopes of the same element. As designed, CFUS achieves a geometrical factor of about 300 c m ' ster. This geometrical factor will, for example, allow CRIS to collect more than lo5 Fe nuclei in its first two years of operation, enough to permit a precise determination of the abundance of even the r a r e stable iron isotope, =Fe, which is expected to make up only about 0.3% of the total Fe flux
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.