Résumé: Goldsmith AU: Reference citation deleted in abstract. Reword if desired, proposed an adaptive rate MQAM with variable power for a higher transmission rate in a fading channel. However, its successful operation requires a highly linear power amplifier to support its variable transmission power. In this letter, to alleviate this requirement, we present an adaptive rate MQAM with on/off power control. The numerical results show that the proposed scheme has a smaller dynamic range of transmission power than the Goldsmith's one [1] and suffers from SNR degradation of about 1.3 dB in terms of spectral efficiency when a set of integer rates is employed.

Langue: Anglais