Communication device comprising a power amplifier and method of implementation

A communication device comprising:

• a power amplifier configured to amplify a signal intended to be emitted on a frequency channel;
• a variable voltage source for providing a bias voltage of the amplifier;
• and
• a memory comprising software code and a processor which, when executing the software code, causes the device to adjust the bias voltage provided by the variable voltage source according to at least one parameter comprising the frequency channel,
• the processor and the software code being adapted to lead the device to produce, from pre-programmed data and as a function of the at least one parameter, a control signal of the variable voltage source, said control signal being representative of the adjusted value of the bias voltage,
• the adjusted bias voltage being adapted to, when a power that the amplifier can supply at a nominal bias voltage is not necessary for the transmission of the signal, decrease the power that the amplifier can supply following the adjustment of the bias voltage, the power that the amplifier can supply following the adjustment being greater than or equal to a maximum transmission power threshold of the signal as a function of the at least one parameter and wherein the decrease is adapted to reduce a power reserve of the amplifier above the threshold, and
• the at least one parameter comprising a modulation of the signal, the pre-programmed data being such that for a given frequency channel, a bias voltage produced for a first modulation defined by a constellation comprising a first number of points is greater than a bias voltage produced for a second modulation comprising a second number of points, the second number of points being greater than the first number of points.