Low complexity MIMO digital pre-distortion
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsHaiying Cao, Spendim Dalipi, Per Landin
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Abstract
A method and a transmitter arrangement for cancelling cross talk and correcting power amplifier (PA) distortion for a transmitter branch of a multiple-input multiple-output (MIMO) configuration having multiple branches. The method comprises combining an original baseband input signal of a first MIMO transmitter branch with a crosstalk output signal generated from two or more signals associated with two or more respective MIMO branches, the two or more signals used as input to, and processed by, a crosstalk model. The method further comprises processing the combined signal to generate an output signal in order to minimize the error of the original baseband input signal caused by the crosstalk and/or PA distortion.
Claims20
A method for cancelling crosstalk and correcting power amplifier (PA) distortion for a transmitter branch of a multiple-input multiple-output (MIMO) configuration having multiple branches, the method comprising:
- combining an original baseband input signal of a first MIMO transmitter branch with a crosstalk output signal generated from two or more signals (y2, y3, y4) associated with two or more respective MIMO branches to produce a combined signal, wherein the two or more signals are used as input to, and processed by, a crosstalk model;
- digitally pre-distorting the combined signal;
- and
- processing the combined signal to generate an output signal in order to minimize error of the original baseband input signal caused by the crosstalk and/or PA distortion.
A transmitter arrangement for cancelling crosstalk and correcting power amplifier (PA) distortion for a transmitter branch of a multiple-input multiple-output (MIMO) configuration having multiple branches, comprising:
- an interface for receiving an original baseband signal of a first MIMO branch;
- processing circuitry configured to combine the original baseband input signal of the first MIMO branch with a crosstalk output signal generated from two or more signals associated with two or more respective MIMO branches to produce a combined signal, wherein the two or more signals are used as input to, and processed by, a crosstalk model;
- digitally pre-distorting the combined signal;
- and
- the processing circuitry further configured to process the combined signal to generate an output signal in order to minimize error of the original baseband input signal caused by the crosstalk and/or PA distortion.
A non-transitory, tangible computer-readable memory having instructions that, when executed by processing circuitry, cause the processing circuitry to perform operations comprising:
- combine an original baseband input signal of a first MIMO transmitter branch with a crosstalk output signal generated from two or more signals associated with two or more respective MIMO branches to generate a combined signal, the two or more signals being used as inputs to and processed by a crosstalk model;
- digitally pre-distorting the combined signal;
- and
- process the combined signal to generate an output signal in order to minimize error of the original baseband input signal caused by the crosstalk and/or PA distortion.
Dependencies are inferred from the claim text.