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US 7,889,811 B2Granted
Digital linear amplification with nonlinear components (LINC) transmitter
AssigneesSamsung Electro-Mechanics Co., Ltd., Georgia Tech Research Corporation
InventorsSangjin Byun, Kwanwoo Kim, Kyutae Lim, Chang-Ho Lee, Haksun Kim, Joy Laskar
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Abstract
Embodiments of the invention may provide for a digital LINC (linear amplification with nonlinear components) transmitter. The digital LINC transmitter may include a signal component separator, at least one digital delay modulator, a frequency synthesizer, at least one power amplifier, a power combiner, an antenna, and a mismatch compensator. Additionally, systems and methods may be provided for compensating for phase and amplitude mismatches between two signal paths.
Claims20
A digital linear amplification with non-linear components (LINC) transmitter, comprising:
- a signal component separator that separates a non-constant envelope signal into a first phase data signal and a second phase data signal;
- a frequency synthesizer that generates a plurality of clock signals, wherein the first phase data signal specifies a first pair of the clock signals and wherein the second phase data signal specifies a second pair of the clock signals;
- at least one digital delay modulator that generates a first component signal having a first constant envelope and a second component signal having a second constant envelope, wherein the first component signal is generated by dividing and digitally delaying the first pair of clock signals based upon the first phase data signal, and wherein the second component signal is generated by dividing and digitally delaying the second pair of clock signals based upon the second phase data signal;
- at least one non-linear power amplifier that amplifies the first component signal and the second component signal to generate an amplified first component signal and an amplified second component signal;
- a power combiner that combines the first amplified component signal and the second amplified component signal to generate an output signal having a non-constant envelope;
- and
- a mismatch compensator that monitors the output signal to select at least one offset value, wherein the selected at least one offset value is provided to at least one of the signal component separator for phase adjustment or the non-linear power amplifier for gain adjustment.
4 more elements
A method for a digital linear amplification with non-linear components (LINC) transmitter, comprising:
- separating a non-constant envelope signal by a signal component separator into a first phase data signal and a second phase data signal;
- selecting a first pair of clock signals and a second pair of clock signals from a plurality of clock signals;
- generating, by at least one digital delay modulator, a first component signal having a first constant envelope and a second component signal having a second constant envelope, wherein the first component signal is generated based at least in part on dividing and digitally delaying the first pair of clock signals that are based upon the first phase data signal and the second component signal is generated based at least in part on dividing and digitally delaying the second pair of clock signals that are based upon the second phase data signal;
- amplifying the first component signal and the second component signal by at least one non-linear amplifier to generate an amplified first component signal and an amplified second component signal;
- combining the first amplified component signal and the second amplified component signal to generate an output signal having a non-constant envelope;
- and
- monitoring the output signal to select a phase offset value and an amplitude offset value, wherein the selected at least one offset value is provided to at least one of the signal component separator for phase adjustment or the non-linear power amplifier for gain adjustment.
4 more elements
A system, comprising:
- a signal component separator that separates a non-constant envelope signal into a first phase data signal and a second phase data signal;
- at least one digital delay modulator that generates a first component signal having a first constant envelope and a second component signal having a second constant envelope, wherein the first component signal is generated based at least in part on dividing and digitally delaying a first pair of clock signals that are based upon the first phase data signal and the second component signal is generated based at least in part on dividing and digitally delaying a second pair of clock signals that are based upon the second phase data signal;
- at least one non-linear amplifier that amplifies the first component signal and the second component signal to generate an amplified first component signal and an amplified second component signal;
- means for combining the first amplified component signal and the second amplified component signal to generate an output signal having a non-constant envelope;
- and
- means for selecting a phase offset value and an amplitude offset value based at least in part on the output signal, wherein the selected at least one offset value is provided to at least one of the signal component separator for phase adjustment or the non-linear power amplifier for gain adjustment.
3 more elements
Dependencies are inferred from the claim text.