DocumentCode :
132126
Title :
On the use of multiple satellites to improve the spectral efficiency of broadcast transmissions
Author :
Ugolini, Alessandro ; Piemontese, Amina ; Modenini, Andrea ; Colavolpe, Giulio
Author_Institution :
DII, Univ. of Parma, Parma, Italy
fYear :
2014
fDate :
8-10 Sept. 2014
Firstpage :
218
Lastpage :
225
Abstract :
We consider the use of multiple co-located satellites to improve the spectral efficiency of broadcast transmissions. In particular, we assume that two satellites transmit on overlapping geographical coverage areas, with overlapping frequencies. We first describe the theoretical framework based on network information theory and, in particular, on the theory for multiple access channels. The application to different scenarios will be then considered, including the bandlimited additive white Gaussian noise channel with average power constraint and different models for the nonlinear satellite channel. The comparison with the adoption of frequency division multiplexing (FDM) is also provided. The main conclusion is that a strategy based on overlapped signals is convenient with respect to FDM, although it requires the adoption of a multiuser detection strategy at the receiver.
Keywords :
AWGN channels; direct broadcasting by satellite; frequency division multiplexing; multi-access systems; FDM; average power constraint; bandlimited additive white Gaussian noise channel; broadcast transmissions; frequency division multiplexing; multiple access channels; multiple co-located satellites; multiple satellites; multiuser detection strategy; nonlinear satellite channel; overlapped signals; overlapping geographical coverage areas; receiver; spectral efficiency; AWGN; Frequency division multiplexing; Satellites;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advanced Satellite Multimedia Systems Conference and the 13th Signal Processing for Space Communications Workshop (ASMS/SPSC), 2014 7th
Conference_Location :
Livorno
Type :
conf
DOI :
10.1109/ASMS-SPSC.2014.6934547
Filename :
6934547
Link To Document :
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