Method to Improve Active Antenna System Performance in the Presence of Mutual Coupling
First Claim
1. A method in a network node, comprising:
- receiving a first input signal from a baseband processing unit of a first antenna branch of the network node;
receiving a second input signal from a baseband processing unit of a second antenna branch of the network node;
determining a first compensation coefficient;
determining a second compensation coefficient;
applying the first compensation coefficient to the second input signal received from the baseband processing unit of the second antenna branch to generate a first output signal;
applying the second compensation coefficient to the first input signal received from the baseband processing unit of the first antenna branch to generate a second output signal;
outputting the first output signal to a first power amplifier of the first antenna branch, the first output signal compensating for a mutual coupling from the second antenna branch to the first antenna branch, the first power amplifier operating in a non-linear region; and
outputting the second output signal to a second power amplifier of the second antenna branch, the second output signal compensating for a mutual coupling from the first antenna branch to the second antenna branch, the second power amplifier operating in the non-linear region.
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Abstract
A method in a network node comprises receiving a first input signal from a baseband processing unit of a first antenna branch, receiving a second input signal from a baseband processing unit of a second antenna branch, determining a first and second compensation coefficient, applying the first compensation coefficient to the second input signal to generate a first output signal, applying the second compensation coefficient to the first input signal to generate a second output signal, outputting the first output signal to a first power amplifier of the first antenna branch, the first output signal compensating for a mutual coupling from the second antenna branch to the first antenna branch, and outputting the second output signal to a second power amplifier of the second antenna branch, the second output signal compensating for a mutual coupling from the first antenna branch to the second antenna branch.
31 Citations
20 Claims
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1. A method in a network node, comprising:
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receiving a first input signal from a baseband processing unit of a first antenna branch of the network node; receiving a second input signal from a baseband processing unit of a second antenna branch of the network node; determining a first compensation coefficient; determining a second compensation coefficient; applying the first compensation coefficient to the second input signal received from the baseband processing unit of the second antenna branch to generate a first output signal; applying the second compensation coefficient to the first input signal received from the baseband processing unit of the first antenna branch to generate a second output signal; outputting the first output signal to a first power amplifier of the first antenna branch, the first output signal compensating for a mutual coupling from the second antenna branch to the first antenna branch, the first power amplifier operating in a non-linear region; and outputting the second output signal to a second power amplifier of the second antenna branch, the second output signal compensating for a mutual coupling from the first antenna branch to the second antenna branch, the second power amplifier operating in the non-linear region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A network node, comprising:
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one or more processors, the one or more processors configured to; receive a first input signal from a baseband processing unit of a first antenna branch of the network node; receive a second input signal from a baseband processing unit of a second antenna branch of the network node; determine a first compensation coefficient; determine a second compensation coefficient; apply the first compensation coefficient to the second input signal received from the baseband processing unit of the second antenna branch to generate a first output signal; apply the second compensation coefficient to the first input signal received from the baseband processing unit of the first antenna branch to generate a second output signal; output the first output signal to a first power amplifier of the first antenna branch, the first output signal compensating for a mutual coupling from the second antenna branch to the first antenna branch, the first power amplifier operating in a non-linear region; and output the second output signal to a second power amplifier of the second antenna branch, the second output signal compensating for a mutual coupling from the first antenna branch to the second antenna branch, the second power amplifier operating in the non-linear region. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification