Title :
Hysteresis effects in instantaneous frequency scaling of attenuation on 20 and 30 GHz satellite links
Author :
Sweeney, D.G. ; Pratt, T. ; Bostian, C.W.
Author_Institution :
Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
It has been observed with 20/30 GHz satellite beacon measurements that the ratio of 30 GHz to 20 GHz attenuation changes during some fade events. This ratio displays a hysteresis effect. This effect can be explained by a change in the drop size distribution (DSD) during the event. However, it appears only above approximately 6-8 dB of attenuation at 20 GHz. Instantaneous frequency scaling of attenuation is being proposed as part of an algorithm for uplink power control (ULPC) and the dynamic range of such an algorithm must be appropriately limited to avoid the hysteresis.
Keywords :
fading; hysteresis; microwave links; radiowave propagation; rain; satellite links; satellite relay systems; tropospheric electromagnetic wave propagation; 20 GHz; 30 GHz; SHF; attenuation; drop size distribution; dynamic range; fade events; hysteresis effect; instantaneous frequency scaling; satellite beacon measurements; satellite links; uplink power control;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920047
