Title :
Adaptive scheme for M-DPSK signals in LEO satellite communications
Author :
Nunes, Fernando D. ; Leitão, José M N
Author_Institution :
Instituto de Telecomunicacoes, Instituto Superior Tecnico, Lisbon, Portugal
Abstract :
Adaptive schemes, consisting of a channel gain prediction algorithm and a feedback channel, have been proposed as an alternative to conventional diversity techniques to decrease the error rates in fading channels. In this paper, we analyze the feasibility of using adaptive schemes in LEO satellite systems. Although limited to quasi-static users and nearby reflectors, the proposed adaptive scheme, which operates in two modes (transmit/don´t transmit), achieves significant error rate reductions regarding conventional constant data rate transmissions
Keywords :
adaptive modulation; differential phase shift keying; fading channels; mobile satellite communication; LEO satellite communications; M-DPSK signals; adaptive scheme; channel gain prediction algorithm; error rate reductions; fading channels; feedback channel; nearby reflectors; quasi-static users; Adaptive systems; Additive noise; Bit error rate; Channel capacity; Error analysis; Fading; Gaussian channels; Low earth orbit satellites; Satellite communication; Transmitters;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944152
