Transmitter pre-distortion across wide transmit power dynamic range
AssigneeBroadcom Corporation
InventorArya Reza Behzad
Life of this patent
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Abstract
An integrated circuit radio transceiver and method therefor includes an integrated circuit radio transceiver operable to provide pre-distortion settings that correspond to specified analog transmit path gain levels. Further, a change in gain is provided solely through digital gain when the new gain is within a specified range. If the gain change is not within the specified range, the gain is provided by a new transmit path gain module and, if necessary, with additional digital gain. Additionally, a new pre-distortion setting is applied to correspond to the new analog transmit path gain setting.
Claims21
A method for operating a wireless device comprising:
- setting total transmit path gain to a first gain level by:
- setting analog transmit path gain to a first analog gain level;
- setting digital transmit path gain to a first digital gain level;
- applying a first pre-distortion setting that corresponds to the first analog gain level to counteract distortion caused by at least one analog transmit path component;
- and
- based upon an operating condition, adjusting total transmit path gain to a second gain level by:
- when the second gain level is within a range relative to the first gain level, adjusting only the digital transmit path gain;
- and
- when the second gain level is outside of the range relative to the first gain level:
- adjusting the analog transmit path gain to a second analog gain level and applying a second pre-distortion setting;
- and
- adjusting the digital gain, if required, to meet the second gain level.
A method for operating a wireless device comprising:
- setting analog transmit path gain by setting gain levels of a plurality of analog components in an analog transmit path;
- setting digital transmit path gain to produce a total transmit path gain;
- applying a first pre-distortion setting corresponding to the analog transmit path gain;
- and
- subsequently changing total transmit path gain by altering only the digital transmit path gain when a total transmit path gain change is within a range.
A wireless device comprising:
- a digital processor operable to produce digital signals;
- digital transmit path circuitry operable to apply digital gain to the digital signals;
- conversion circuitry operable to produce analog signals based upon the outgoing digital signals;
- analog transmit path circuitry operable to apply gain to the analog signals;
- control circuitry operable to:
- set total transmit path gain to a first gain level by:
- setting analog transmit path gain to a first analog gain level;
- setting digital transmit path gain to a first digital gain level;
- applying a first pre-distortion setting that corresponds to the first analog gain level to counteract distortion caused by at least one analog transmit path component;
- and
- based upon an operating condition, adjust total transmit path gain to a second gain level by:
- when the second gain level is within a range relative to the first gain level, adjusting only the digital transmit path gain;
- and
- when the second gain level falls outside of the range relative to the first gain level:
- setting the analog transmit path gain to a second analog gain level and applying a second pre-distortion setting that corresponds to the second analog gain level;
- and
- adjusting the digital gain, if required, to meet the second gain level.
A wireless device comprising:
- a digital processor operable to produce digital signals;
- digital transmit path circuitry operable to apply digital gain to the digital signals;
- conversion circuitry operable to produce analog signals based upon the outgoing digital signals;
- analog transmit path circuitry operable to apply gain to the analog signals;
- control circuitry operable to:
- set analog transmit path gain by setting gain levels of a plurality of analog components in an analog transmit path;
- set digital transmit path gain to produce a total transmit path gain;
- apply a first pre-distortion setting corresponding to the analog transmit path gain;
- and
- subsequently change total transmit path gain by altering only the digital transmit path gain when a total transmit path gain change is within a specified range.
Dependencies are inferred from the claim text.