Results 171 to 180 of about 24,068 (186)
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NGC 6822: SFH of its Intermediate-Age Population
EAS Publications Series, 2011We have monitored, during four years, a 32′× 32′ area of the Local Group dwarf galaxy NGC 6822. Observations lead to the discovery of 30 Miras and 24 semi-regular and irregular variables. When relating the periods of Miras to their age, we find a continuous star formation during the last 3 Gyr.
S. Demers, P. Battinelli
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Bierwisch's analysis as a test of the SFH
Journal of Child Language, 1983ABSTRACTThere has been continuing interest in the Semantic Feature Hypothesis (SFH) over the last ten years but there appears to have been no experimental study which explores a complete semantic field nor one which uses a cross-cultural sample.
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Error probability for bandlimited hybrid SFH/DS-CDMA
Proceedings of PIMRC '96 - 7th International Symposium on Personal, Indoor, and Mobile Communications, 2002This paper derives the average bit error probability (BEP) for bandlimited hybrid SFH/DS-CDMA over an additive white Gaussian channel when overlapping of adjacent hopping bands is permitted in the frequency domain. The numerical results which focused on the gain by overlapping of the hopping bands are presented for DPSK and BFSK modulation/demodulation.
J. Lee, R. Tafazolli, B.G. Evans
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Equalization and decoding in SFH spread-spectrum communications
MILCOM 2000 Proceedings. 21st Century Military Communications. Architectures and Technologies for Information Superiority (Cat. No.00CH37155), 2002There is an increasing need for tactical mobile radio networks that support link data rates of hundreds of kilobits per second to several megabits per second. If a radio network employing slow-frequency-hop (SFH) spread-spectrum modulation operates at these high data rates, however, the channel is likely to exhibit frequency-selective fading within ...
H. Ramchandran, D.L. Noneaker
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Frequency synthesizer of short-wave SFH/MFSK system
Wuhan University Journal of Natural Sciences, 1998The technology of DDS-driven PLL is introduced and a new scheme of frequency synthesizer which is suitable for SW SFH/MFSK System is presented in this paper. Based on the special requirement of SW communication, a model of the scheme is given and the results show that the frequency synthesizer has small frequency insteval (≤0.1 Hz), short switch pierod
Gan Liangcai, Bao Yongqiang
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Characteristics of SFH scattering at breaking sea waves
Radiophysics and Quantum Electronics, 1976A. I. Kalmykov +4 more
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