Methods, apparatus and machine-readable mediums relating to adjusting beam gain in wireless communication networks
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorTorbjörn Wigren
Life of this patent
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Abstract
A method for adjusting beam gain in a radio network node. The method comprises: obtaining a channel estimate based on a reference signal transmitted by a target wireless device; applying a set of weights to the channel estimate to obtain a weighted channel estimate; and outputting the weighted channel estimate for use in determining beamforming weights to be applied to signals output to a plurality of antenna elements for transmission to the target wireless device, wherein the beamforming weights are determined as a function of the weighted channel estimate.
Claims17
A method for adjusting beam gain in a radio network node, the method comprising:
- obtaining a channel estimate based on a reference signal transmitted by a target wireless device;
- determining a set of weights to be applied to the channel estimate, wherein the set of weights is determined so as to achieve a given reduction in beam gain, wherein determining the set of weights comprises iteratively adjusting the set of weights until the given reduction in beam gain is achieved, and wherein determining the set of weights comprises solving G(1)−ΔG−G(ρ)=0, where
- G(1) denotes a maximum beam gain without weighting of the channel estimate,
- G(ρ) denotes a maximum beam gain with weighting as a function of a parameter ρ, and ΔG is the given reduction in beam gain;
- applying the determined set of weights to the channel estimate to obtain a weighted channel estimate;
- and
- determining, as a function of the weighted channel estimate, beamforming weights to be applied to signals output to a plurality of antenna elements for transmission to the target wireless device.
A network node comprising:
- processing circuitry;
- and
- a memory comprising instructions which, when executed by the processing circuitry, cause the network node to:
- obtain a channel estimate based on a reference signal transmitted by a target wireless device;
- determine a set of weights to be applied to the channel estimate, wherein the set of weights is determined so as to achieve a given reduction in beam gain, wherein to determine the set of weights comprises iteratively adjusting the set of weights until the given reduction in beam gain is achieved, and wherein to determine the set of weights comprises solving G(1)−ΔG−G(ρ)=0, where G(1) denotes a maximum beam gain without weighting of the channel estimate, G(ρ) denotes a maximum beam gain with weighting as a function of a parameter ρ, and ΔG is the given reduction in beam gain;
- apply the determined set of weights to the channel estimate to obtain a weighted channel estimate;
- and
- determine, as a function of the weighted channel estimate, beamforming weights to be applied to signals output to a plurality of antenna elements for transmission to the target wireless device.
Dependencies are inferred from the claim text.