Adjusting the amplitude and phase characteristics of transmitter generated wireless communication signals in response to base station transmit power control signals and known transmitter amplifier characteristics

A wireless transmit/receive unit (WTRU) comprising:

• a digital pre-distortion compensation module having real and imaginary signal paths which are configured to receive and process respective real and imaginary signal components;
• an analog radio transmitter including a power amplifier (PA), the analog radio transmitter being configured to receive the processed real and imaginary signal components and, in response, generating a communication signal which is input to the PA;
• a modem having real and imaginary signal paths and being configured to generate the real and imaginary signal components, receive a transmit power control (TPC) signal;
• and
• a controller in communication with the digital pre-distortion compensation module and the PA, wherein the controller includes a TPC mapping unit which receives the TPC signal from the modem, the TPC mapping unit being configured to output a first mapped TPC signal to the digital pre-distortion compensation module and a second mapped TPC signal to the PA, wherein the digital pre-distortion compensation module further comprises:
• a power estimation unit coupled to each of the real and imaginary signal paths, the power estimation unit being configured to generate a power estimation signal based on the magnitude of the real and imaginary signal components;
• a first multiplier being configured to multiply the power estimation signal with the first mapped TPC signal to generate a first resulting product signal;
• at least one lookup table (LUT) being configured to generate an amplitude compensation signal in response to receiving the first resulting product signal;
• and
• a phase distortion compensation unit being configured to generate a phase compensation signal in response to receiving the first resulting product signal.

An integrated circuit (IC) comprising:

• a digital pre-distortion compensation module having real and imaginary signal paths which are configured to receive and process respective real and imaginary signal components;
• an analog radio transmitter including a power amplifier (PA), the analog radio transmitter being configured to receive the processed real and imaginary signal components and, in response, generating a communication signal which is input to the PA;
• a modem having real and imaginary signal paths and being configured to generate the real and imaginary signal components, receive a transmit power control (TPC) signal;
• and
• a controller in communication with the digital pre-distortion compensation module and the PA wherein the controller includes a TPC mapping unit which receives the TPC signal from the modem, the TPC mapping unit being configured to output a first mapped TPC signal to the digital pre-distortion compensation module and a second mapped TPC signal to the PA, wherein the digital pre-distortion compensation module further comprises:
• a power estimation unit coupled to each of the real and imaginary signal paths, the power estimation unit being configured to generate a power estimation signal;
• based on the magnitude of the real and imaginary signal components;
• a first multiplier being confined to multiply the power estimation signal with the first mapped TPC signal to generate a first resulting product signal;
• at least one look up table (LUT) being configured to generate an amplitude compensation signal in response to receiving the first resulting product signal;
• and
• a phase distortion compensation unit being configured to generate a phase compensation signal in response to receiving the first resulting product signal.