Using Adaptive Modulation in a LEO Satellite Communication System
نویسندگان
چکیده
Adaptive modulation is a powerful technique to improve the energy efficiency and increases the data rate over a fading channel. The ground station transmitter and the satellite receiver adapt the modulation scheme and the transmitter power to the state of the channel. In this paper, we study adaptive multi-level quadrature amplitude modulation (M-QAM) schemes for LEO satellite over a Rayleigh fading channel using discrete rate adaptation strategy. This adaptation strategy maximises the capacity of the system. Results show that rate adaptation is the key top increasing system performance in term of average bit error rate assuming perfect knowledge of the channel. Key-Words: Fading channel, adaptive modulation, LEO, Transmitter, Receiver, average BER.
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