Link Feasibility Study
When an optical signal propagates from ground to satellite, various effects of atmosphere, viz., absorption, scattering, and turbulence, will degrade the link performance. The loss arising due to beam propagation in space and effects of atmospheric turbulence are considered in link feasibility study. In this chapter, the received optical signal power in the presence of various losses and background noise are evaluated for a given BER in weak atmospheric turbulence. Subsequently, link power budget is made and the link power margin is determined. Improvement in the link margin has been worked out with transmit diversity and coding scheme when used separately.
KeywordsZenith Angle LDPC Code Single Transmitter Narrow Band Filter Link Budget
- 2.V.A. Vilnrotter, The effect of pointing errors on the performance of optical communications systems, TDA progress report 42–63, Jet Propulsion Laboratory, Pasadena, 1981, pp. 136–146Google Scholar
- 3.P.W. Gorham, D.J. Rochblatt, Effect of antenna-pointing errors on phase stability and interferometric delay, TDA progress report 42–132, Jet Propulsion Laboratory, Pasadena, Feb 1998, pp. 1–19Google Scholar
- 4.W.K. Marshall, B.D. Burk, Received optical power calculations for optical communications link performance analysis, TDA progress report 42–87, Communication Systems Research Section, Jet Propulsion Laboratory, Pasadena, Sept 1986Google Scholar