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US 10,305,435 B1Granted
Transceivers and systems having digital distortion compensation and methods thereof
AssigneeNokia Solutions and Networks Oy
InventorsRosanah Murugesu, Hungkei Chow, Werner Coomans
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Abstract
In an example embodiment, a transceiver includes a plurality of amplifiers configured to amplify an analog transmit signal to generate a plurality of amplified transmit signals for further transmission, a combiner configured to combine a plurality of output signals to generate a combined signal, the plurality of output signals being based on the plurality of amplified transmit signals and at least one processor configured to execute computer-readable instructions to cause the transceiver to determine pre-distortion compensation coefficients based on the combined signal and generate a pre-distortion compensated transmit signal based on the pre-distortion compensation coefficients.
Claims17
A transceiver having a plurality of output transmission paths, the transceiver comprising:
- a plurality of amplifiers configured to amplify an analog transmit signal to generate a plurality of amplified transmit signals for further transmission;
- a combiner configured to combine a plurality of output signals for the plurality of output transmission paths to generate a combined signal, the plurality of output signals being based on the plurality of amplified transmit signals;
- an analog-to-digital converter (ADC) configured to convert the combined signal to a digital combined signal;
- and
- at least one processor configured to execute computer-readable instructions to cause the transceiver to,
- determine an error based on the digital combined signal and a reference signal,
- determine pre-distortion compensation coefficients based on the error, and
- generate a pre-distortion compensated transmit signal based on the pre-distortion compensation coefficients, wherein the reference signal is a digital transmit signal, the analog transmit signal is based on the digital transmit signal and the at least one processor is configured to execute the computer-readable instructions to cause the transceiver to determine the error as being a difference between the digital combined signal and a convolution of the reference signal with a channel response within the transceiver.
5 more elements
A transceiver having a plurality of output transmission paths, the transceiver comprising:
- a plurality of amplifiers configured to amplify an analog transmit signal to generate a plurality of amplified transmit signals for further transmission;
- a combiner configured to combine a plurality of output signals for the plurality of output transmission paths to generate a combined signal, the plurality of output signals being based on the plurality of amplified transmit signals;
- an analog-to-digital converter (ADC) configured to convert the combined signal to a digital combined signal;
- and
- at least one processor configured to execute computer-readable instructions to cause the transceiver to,
- determine an error based on the digital combined signal and a reference signal,
- determine pre-distortion compensation coefficients based on the error, and
- generate a pre-distortion compensated transmit signal based on the pre-distortion compensation coefficients, wherein the reference signal is a digital transmit signal, the analog transmit signal is based on the digital transmit signal and the at least one processor is configured to execute the computer-readable instructions to cause the transceiver to determine the error as being a difference between the reference signal and a convolution of the digital combined signal with an inverse of a channel response within the transceiver.
5 more elements
A method for compensating for digital distortion, the method comprising:
- amplifying an analog transmit signal to generate a plurality of amplified transmit signals for further transmission;
- combining a plurality of output signals for a plurality of output transmission paths to generate a combined signal, the plurality of output signals being based on the plurality of amplified transmit signals, the plurality of output signals being analog output signals and the combined signal is an analog signal;
- converting the combined signal to a digital combined signal;
- determining an error based on the digital combined signal and a reference signal;
- determining pre-distortion compensation coefficients based on the error;
- and
- generating a subsequent pre-distortion compensated transmit signal based on the pre-distortion compensation coefficients, wherein the reference signal is a digital transmit signal, the analog transmit signal is based on the digital transmit signal and the determining the error determines the error as being a difference between the digital combined signal and a convolution of the reference signal with a channel response within a transceiver.
4 more elements
A method for compensating for digital distortion, the method comprising:
- amplifying an analog transmit signal to generate a plurality of amplified transmit signals for further transmission;
- combining a plurality of output signals for a plurality of output transmission paths to generate a combined signal, the plurality of output signals being based on the plurality of amplified transmit signals, the plurality of output signals being analog output signals and the combined signal is an analog signal;
- converting the combined signal to a digital combined signal;
- determining an error based on the digital combined signal and a reference signal;
- determining pre-distortion compensation coefficients based on the error;
- and generating a subsequent pre-distortion compensated transmit signal based on the pre-distortion compensation coefficients, wherein the reference signal is a digital transmit signal, the analog transmit signal is based on the digital transmit signal and the determining the error determines the error as being a difference between the reference signal and a convolution of the digital combined signal with an inverse of a channel response within a transceiver.
3 more elements
Dependencies are inferred from the claim text.