Abstract
Communication links to earth satellites are not usually affected adversely by propagating through the ionosphere. However, the nonlinear variation of the refractive index with frequency causes a dispersion which can result in significant signal distortion under certain circumstances. Such a case occurs, for example, when a wide-band frequency-modulated (FM) signal propagating at the lower carrier frequencies traverses a low-elevation path through a disturbed ionosphere. Expansions are now available for the spectrum of the output phase of an angle-modulated signal which has been passed through a generalized linear filter. The ionosphere is modeled as such a filter in this study and the spectrum of the demodulated signal is determined. From this, formulas are obtained for the output signal-to-distortion and signal-to-crosstalk ratios. The spectral results are presented graphically for FM with a uniform baseband, and two cases of current interest are examined numerically
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
