Title :
Fast tropospheric delay predictions for antenna height diversity
Author :
Christopher, Paul
Author_Institution :
Stanford Telecommun. Inc., Reston, VA, USA
fDate :
5/1/1997 12:00:00 AM
Abstract :
Terrestrial microwave links sometimes suffer from signal fading which may be relieved with antenna diversity or frequency diversity. Vertical spacing of the antennas has been known empirically to offer performance gains for many links. A fast new method for tropospheric delay predictions is discussed. It uses Mathematica for critical functional fits to refractivity profiles, and a critical closed-form integration. A practical antenna diversity example is shown, with reference to Sylvain (see ibid., vol.43, no.7, p.2271, 1995)
Keywords :
delays; diversity reception; electrical engineering; electrical engineering computing; electromagnetic wave refraction; fading; microwave antennas; microwave links; microwave propagation; tropospheric electromagnetic wave propagation; Mathematica; antenna height diversity; critical closed-form integration; critical functional fits; fast tropospheric delay predictions; performance gains; refractivity profiles; signal fading; terrestrial microwave links; vertical spacing; Delay effects; Fading; Frequency diversity; Global Positioning System; Microwave antennas; Performance gain; Probability density function; Propagation delay; Radar antennas; Refractive index;
Journal_Title :
Communications, IEEE Transactions on
