A transmitter for a mobile device, the transmitter comprising: an encoder and modulator configured to generate an encoded and modulated transmit signal based on an input signal; a digital to analog converter coupled to the encoder and modulator and configured to generate an analog representation of the encoded and modulated transmit signal; an amplifier stage coupled to the digital to analog converter and configured to amplify the analog representation of the encoded and modulated transmit signal to generate a transmission signal; and an amplifier control block configured to generate an amplifier control signal for adjusting at least one parameter of the amplifier stage, the amplifier control signal being generated based on mapping a peak to average power ratio and an average transmit power of the transmission signal determined during calibration, wherein: the amplifier control block comprises at least a mapper of a plurality of mappers (115, 120, 120', 121) having a plurality of stored arrays or look up tables corresponding to a plurality of different peak to average power ratios to generate a corresponding amplifier control signal based on the average transmit power of the transmission signal; and the amplifier control block is configured to synchronously switch the plurality of stored arrays or look up tables used in the mapper with a change in the input signal to operably compensate for a step response in the transmission signal to the change in the input signal. an encoder and modulator configured to generate an encoded and modulated transmit signal based on an input signal; a digital to analog converter coupled to the encoder and modulator and configured to generate an analog representation of the encoded and modulated transmit signal; an amplifier stage coupled to the digital to analog converter and configured to amplify the analog representation of the encoded and modulated transmit signal to generate a transmission signal; and an amplifier control block configured to generate an amplifier control signal for adjusting at least one parameter of the amplifier stage, the amplifier control signal being generated based on mapping a peak to average power ratio and an average transmit power of the transmission signal determined during calibration, wherein: the amplifier control block comprises at least a mapper of a plurality of mappers (115, 120, 120', 121) having a plurality of stored arrays or look up tables corresponding to a plurality of different peak to average power ratios to generate a corresponding amplifier control signal based on the average transmit power of the transmission signal; and the amplifier control block is configured to synchronously switch the plurality of stored arrays or look up tables used in the mapper with a change in the input signal to operably compensate for a step response in the transmission signal to the change in the input signal. the amplifier control block comprises at least a mapper of a plurality of mappers (115, 120, 120', 121) having a plurality of stored arrays or look up tables corresponding to a plurality of different peak to average power ratios to generate a corresponding amplifier control signal based on the average transmit power of the transmission signal; and the amplifier control block is configured to synchronously switch the plurality of stored arrays or look up tables used in the mapper with a change in the input signal to operably compensate for a step response in the transmission signal to the change in the input signal.