中国科学G辑(英文版)
中國科學G輯(英文版)
중국과학G집(영문판)
SCIENCE IN CHINA (PHYSICS ASTRONOMY)
2003年
4期
337-347
,共11页
许正文%吴健%霍文平%吴振森
許正文%吳健%霍文平%吳振森
허정문%오건%곽문평%오진삼
radio wave propagation%random media%pulse%mean square pulse width%temporal broadening
Pulse signals, propagating through a turbulent medium such as the ionosphere, can be distorted by dispersion and scattering from both the background medium and irregularities embedded in. Thus, the mean square pulse width is changed, and temporal broadening is introduced. We carry out a study on the temporal broadening with theoretical analyses and numerical simulations by using an analytical solution of two-frequency mutual coherence function obtained recently by iteration. As a case of study, pulse broadening is investigated in detail in trans-ionospheric propagation. Results show that most contributions are mainly from the dispersion of the background ionosphere and scattering effects of electron density irregularities in most cases.
