Implementing adaptive power control as a 30/20-GHz fade countermeasure

Author

Sweeney, Dennis G. ; Bostian, Charles William

Author_Institution

Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA

Volume

47

Issue

1

fYear

1999

fDate

1/1/1999 12:00:00 AM

Firstpage

40

Lastpage

46

Abstract

Satellite systems in the 30/20-GHz band are very susceptible to outages due to rain-induced fades. In order to reduce the impact of these fades, it has been proposed that the power of a transmitting ground station be adjusted during the fade to compensate for the additional attenuation. Real-time frequency scaling of attenuation from the downlink to the uplink shows promise for estimating the uplink attenuation for uplink power control (ULPC). A scaling-type ULPC algorithm using 20-GHz attenuation scaled to 30 GHz is presented. The limitations of such an algorithm and the effects of scintillation on ULPC are explored. The algorithm is tested using OLYMPUS fade data measured on the 14° elevation OLYMPUS to Blacksburg, VA path. An ULPC scheme employing a beacon at the uplink is also presented. It offers better performance than scaled downlink attenuation ULPC

Keywords

adaptive control; electromagnetic wave absorption; fading; microwave propagation; power control; radio transmitters; rain; satellite links; telecommunication control; tropospheric electromagnetic wave propagation; 20 GHz; 30 GHz; Blacksburg; OLYMPUS fade data; SHF; adaptive power control; attenuation; beacon; downlink; fade countermeasure; performance; rain-induced fades; real-time frequency scaling; satellite systems; scaling-type ULPC algorithm; scintillation; transmitting ground station; uplink attenuation estimation; uplink power control; Adaptive control; Attenuation; Downlink; Fading; Frequency estimation; Power control; Programmable control; Rain; Satellite communication; Satellite ground stations;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.752985

Filename

752985