这篇论文上哪儿找去啊？谢谢~！

Title:
A model for wideband HF propagation channels
Authors:
Vogler, L. E.; Hoffmeyer, J. A.
Journal:
Radio Science, Volume 28, Issue 6, p. 1131-1142 (RaSc. Homepage)
Publication Date:
00/1993
Origin:
AGU
AGU Keywords:
Radio Science: Ionospheric propagation, Radio Science: Radio wave propagation, Electromagnetics: Numerical methods
Abstract Copyright:
(c) 1993: American Geophysical Union
Bibliographic Code:
1993RaSc...28.1131V
Abstract
Expressions to model the sky wave propagation conditions that occur in a HF communication link are presented. The model is intended not only for narrowband applications but also for wideband systems such as those using spread spectrum techniques. A discussion of the background leading to the present development effort is followed by a description of the method used to derive the model transfer function. Analytic expressions for the impulse response and the scattering function are given, and the introduction of random processes into the model is described. Comparisons of scattering functions from the model and from measurements are shown for spread-F conditions ranging from mild to intense and for both an auroral path and a midlatitude path.
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Radio Science, Volume 28, Issue 6, p. 1131-1142 (RaSc. Homepage),1993年出版的Radio Science,谁有这篇论文 or 提供一个下载的办法,谢谢~!!!

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