Title :
Performance evaluation of MC-CDMA techniques for variable bit-rate transmission in LEO satellite networks
Author :
Sacchi, Claudio ; Gera, Gianluca ; Regazzoni, Carlo S.
Author_Institution :
Dept. of Biophys. & Electron. Eng., Genoa Univ., Italy
Abstract :
This work is aimed at investigating the use of multi-carrier CDMA (MC-CDMA) techniques in variable bit-rate transmission over low-earth-orbit (LEO) satellite channels by means of realistic simulations. It is known from the literature that MC-CDMA techniques are much more resilient with respect to multi-user interference effects in multipath fading channels than single-carrier DS/CDMA ones. Moreover, MC-CDMA exhibits a natural capability to deliver multirate services simply by assigning to each user a variable-cardinality set of subcarriers. The achieved simulation results clearly confirmed the expected improved robustness of MC-CDMA techniques transmitting multirate data streams in frequency selective LEO satellite channels, with respect to state-of-the-art DS/CDMA transceivers
Keywords :
OFDM modulation; code division multiple access; fading channels; multipath channels; satellite communication; LEO satellite networks; MC-CDMA techniques; OFDM; frequency selective channels; low-earth-orbit satellite channels; multi-carrier CDMA; multi-user interference effects; multipath fading channels; multirate services; performance evaluation; subcarriers; variable bit-rate transmission; variable-cardinality set; Artificial satellites; Fading; Interference; Low earth orbit satellites; Multiaccess communication; Multicarrier code division multiple access; Multipath channels; OFDM; Satellite broadcasting; Transceivers;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.936631
