Title :
Performance evaluation of CDMA/PRMA techniques for LEO constellations
Author :
Batsios, N. ; Tsetsinas, I. ; Pavlidou, F.-N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Thessaloniki Univ., Greece
Abstract :
A CDMA/PRMA protocol is proposed for application to low Earth orbit (LEO) communication systems. The large carrier frequency shift caused by the high speed movement of satellites (Doppler effects) and the large propagation delay on the up-down link are very critical issues in LEO communications, both affecting the selection and the implementation of a suitable access technique. Extended simulation trials prove that the proposed scheme seems to be a very promising access method for the case of mixed voice/data traffic
Keywords :
Doppler shift; access protocols; code division multiple access; integrated voice/data communication; packet reservation multiple access; radiowave propagation; satellite communication; CDMA; CDMA/PRMA protocol; Doppler effects; LEO constellations; PRMA; access method; carrier frequency shift; high speed movement; low Earth orbit communication; mixed voice/data traffic; performance evaluation; propagation delay; up-down link; Artificial satellites; Communication system control; Doppler shift; Frequency; Interference; Low earth orbit satellites; Multiaccess communication; Permission; Protocols; Satellite ground stations;
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.2001.944908
