Performance evaluation of CDMA/PRMA techniques for LEO constellations
N. Batsios, Ioannis Tsetsinas, F.-N. Pavlidou · 2002
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.