Abstract:
An apparatus for amplifying a transmit signal includes a power amplifier module arranged within a transmit path to be coupled to an antenna module. The power amplifier module is configured to amplify a transmit signal. Further, the apparatus includes a coupling module arranged between the power amplifier module and the antenna module. The coupling module is configured to provide a reverse feedback signal substantially generated by a part of the amplified transmit signal reflected by the antenna module. Further, the apparatus includes a determining module configured to determine a delay information on a delay between the transmit path and an envelope tracking path based on at least the reverse feedback signal. Additionally, the apparatus includes a power supply module arranged within the envelope tracking path configured to vary a power supply of the power amplifier module based on a transmit signal envelope information with a temporal alignment depending on the delay information.
Abstract:
An apparatus for amplifying a transmit signal comprises a transmit path comprising a power amplifier module to be coupled to an antenna module. The power amplifier module is configured to amplify a transmit signal. Further, the apparatus comprises an envelope tracking path comprising a variable delay module and a power supply module. The variable delay module is configured to vary a signal delay within the envelope tracking path according to a delay control parameter. Further, the apparatus comprises a delay control module configured to provide the delay control parameter based on a current characteristic transmit frequency of the transmit signal.
Abstract:
An apparatus for amplifying a transmit signal includes a power amplifier module arranged within a transmit path to be coupled to an antenna module. The power amplifier module is configured to amplify a transmit signal. Further, the apparatus includes a coupling module arranged between the power amplifier module and the antenna module. The coupling module is configured to provide a reverse feedback signal substantially generated by a part of the amplified transmit signal reflected by the antenna module. Further, the apparatus includes a determining module configured to determine a delay information on a delay between the transmit path and an envelope tracking path based on at least the reverse feedback signal. Additionally, the apparatus includes a power supply module arranged within the envelope tracking path configured to vary a power supply of the power amplifier module based on a transmit signal envelope information with a temporal alignment depending on the delay information.
Abstract:
An apparatus for a mobile communication device adapted for digital pre-distortion that includes a memory and a processor operatively coupled to the memory of the processor. The processor receives a first input signal and also receives a first output signal from a power amplifier that is based on the first input signal. The processor additionally varies compression applied to a second input signal based on the first output signal of the power amplifier, generates a distortion compensation vector for the second input signal based on the first output signal of the power amplifier, and also varies an input excitation signal supplied to the power amplifier based on the first output signal of the power amplifier.
Abstract:
An apparatus for amplifying a transmit signal comprises a transmit path comprising a power amplifier module to be coupled to an antenna module. The power amplifier module is configured to amplify a transmit signal. Further, the apparatus comprises an envelope tracking path comprising a variable delay module and a power supply module. The variable delay module is configured to vary a signal delay within the envelope tracking path according to a delay control parameter. Further, the apparatus comprises a delay control module configured to provide the delay control parameter based on a current characteristic transmit frequency of the transmit signal.