Title :
An inexpensive rain fade countermeasure technique for DA-TDMA satellite systems
Author :
Celandroni, Nedo ; Potortì, Francesco ; Rizzo, Santi T.
Author_Institution :
Inst. of Nat. Res. Council, Pisa, Italy
Abstract :
Rain attenuation countermeasure systems for geostationary satellite transmissions have been proposed that use a variety of methods. This paper presents a technique which only requires a burst modem that is able to vary its bit and coding rate on a sub-burst basis coupled with a convolutional encoder/Viterbi decoder. A complete method for predicting the attenuation at the receive time is described for two different DA-TDMA systems, using centralised and distributed control, respectively. The method is used for choosing the up power, bit and coding rate of the data to be transmitted. Its performance is evaluated on the basis of experimental results
Keywords :
Viterbi decoding; centralised control; convolutional codes; distributed control; electromagnetic wave absorption; electromagnetic wave scattering; fading; interference suppression; microwave propagation; modems; radiofrequency interference; rain; satellite communication; telecommunication control; time division multiple access; tropospheric electromagnetic wave propagation; variable rate codes; 12 to 20 GHz; DA-TDMA satellite systems; Viterbi decoder; bit rate; burst modem; centralised control; coding rate; convolutional encoder; demand assignment TDMA; distributed control; geostationary satellite transmissions; performance; rain attenuation countermeasure systems; rain fade countermeasure technique; up power; AWGN; Additive white noise; Attenuation; Bit rate; Centralized control; Gaussian noise; Modems; Rain fading; Satellites; Transponders;
Conference_Titel :
Global Telecommunications Conference, 1996. GLOBECOM '96. 'Communications: The Key to Global Prosperity
Conference_Location :
London
Print_ISBN :
0-7803-3336-5
DOI :
10.1109/GLOCOM.1996.587581
