SSMA and spread FDMA transmission through a nonlinear satellite channel

Author

Sampaio-Neto, Raimundo ; Albuquerque, José Paulo A

Author_Institution

Center for Studies in Telecommun., Pontificia Universidade Catolica, Rio de Janeiro, Brazil

fYear

1989

Firstpage

499

Abstract

The authors analyze and compare two possible access schemes, spread-spectrum multiple access (SSMA) and frequency-division multiple access (FDMA) to be used in satellite networks with a large number of small users. For FDMA, it is assumed that individual carriers are also spread, to the extent that the available bandwidth is always fully occupied. Spectral efficiencies are computed and compared for transmission through a nonlinear satellite channel in the presence of thermal noise and external interference, in addition to the self-interference that is intrinsic to the SSMA system. Optimum operating points for the nonlinear amplifier are also determined. As for the linear channel, spread FDMA shows higher efficiency than SSMA for the nonlinear channel

Keywords

frequency division multiple access; multi-access systems; satellite relay systems; spread spectrum communication; telecommunication channels; SSMA; external interference; frequency-division multiple access; nonlinear amplifier; nonlinear satellite channel; optimum operating points; self-interference; spectral efficiencies; spread FDMA transmission; spread-spectrum multiple access; thermal noise; Bandwidth; Binary phase shift keying; Error probability; Frequency division multiaccess; Interference; Noise figure; RF signals; Satellites; Sections; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 1989. ICC '89, BOSTONICC/89. Conference record. 'World Prosperity Through Communications', IEEE International Conference on

Conference_Location

Boston, MA

Type

conf

DOI

10.1109/ICC.1989.49747

Filename

49747