WIRELESS COMMUNICATION UNIT, INTEGRATED CIRCUITS AND METHOD FOR LINEARIZING A TRANSMITTER SIGNAL

摘要

A wireless communication unit comprising a transmitter comprises: a linearization circuit arranged to receive and digitally distort an input signal; a radio frequency power amplifier operably coupled to the linearization circuit and arranged to amplify a radio frequency representation of the digitally distorted input signal; a feedback path arranged to feed back a portion of the amplified digitally distorted output of the received input signal to the linearization circuit; a bypass circuit comprising a plurality of energy storage elements operably coupled between an output of the radio frequency power amplifier and ground; and a first connector arranged to provide a representation of at least one electrical memory effect of at least one of the plurality of energy storage elements to the linearization circuit, wherein the linearization circuit is arranged to use the representation of the at least one electrical memory effect when digitally distorting the input signal.

主权项

1. A wireless communication unit, comprising:
a transmit chain for providing an RF signal to an antenna, the transmit chain comprising: a linearization circuit arranged to receive and digitally distort an input signal; a radio frequency power amplifier operably coupled to the linearization circuit and arranged to amplify a radio frequency representation of the digitally distorted input signal and output at an radio frequency power amplifier output the RF signal to the antenna; a feedback path arranged to feed back a portion of the amplified digitally distorted output of the received input signal to the linearization circuit; a bypass circuit comprising a plurality of energy storage elements operably coupled between an output of the radio frequency power amplifier and ground; and a first connector arranged to provide a representation of at least one electrical memory effect of the at least one of the plurality of energy storage elements to the linearization circuit, wherein the linearization circuit is arranged to use the representation of the at least one electrical memory effect when digitally distorting the input signal.