Gain transient response compensation
AssigneeNokia Technologies Oy
InventorHideki Nakahara
Life of this patent
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Abstract
A method, apparatus and computer program is described comprising: determining an absolute gain of a power amplifier over time, wherein the absolute gain is formed from the division of a feedback baseband signal derived (e.g. by demodulating an RF signal) from an output of the power amplifier, by a forward baseband signal that is used to form an input of the power amplifier; determining a relative gain transient response (GTR) of the power amplifier, by normalising the absolute gain to generate a relative gain of the power amplifier over time; and determining a transient response compensation value having inverse characteristics to the relative gain transient response.
Claims19
An apparatus, comprising:
- at least one processor;
- and
- at least one memory including computer program code;
- the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least
- determining an absolute gain of a power amplifier over time, wherein the absolute gain is formed from the division of a feedback baseband signal derived from an output of the power amplifier by a forward baseband signal that is used to form an input of the power amplifier;
- determining a relative gain transient response of the power amplifier, by normalizing the absolute gain to generate a relative gain of the power amplifier over time;
- and
- determining a gain transient response compensation coefficient having inverse characteristics to the relative gain transient response.
A method, comprising:
- determining an absolute gain of a power amplifier over time, wherein the absolute gain is formed from the division of a feedback baseband signal derived from an output of the power amplifier by a forward baseband signal that is used to form an input of the power amplifier;
- determining a relative gain transient response of the power amplifier, by normalizing the absolute gain to generate a relative gain of the power amplifier over time;
- and
- determining a gain transient response compensation coefficient having inverse characteristics to the relative gain transient response.
A computer program embodied on a non-transitory computer-readable medium, said computer program comprising instructions stored thereon which, when executed in hardware, cause the hardware to perform at least the following:
- determining an absolute gain of a power amplifier over time, wherein the absolute gain is formed from the division of a feedback baseband signal derived from an output of the power amplifier by a forward baseband signal that is used to form an input of the power amplifier;
- determining a relative gain transient response of the power amplifier, by normalizing the absolute gain to generate a relative gain of the power amplifier over time;
- and
- determining a gain transient response compensation value having inverse characteristics to the relative gain transient response.
Dependencies are inferred from the claim text.