Methods and devices for indicating precoder parameters in a wireless communication network
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsSebastian FAXÉR, Svante BERGMAN
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Abstract
A method for indicating parameters of a precoder from a wireless device to a network node in a wireless communication system is provided. The method comprises: determining at least one rotation factors associated with a plurality of orthogonal beams; selecting a subset of beams from the plurality of orthogonal beams; and sending, to the network node, the selected subset of beams and the at least one rotation factors, wherein the selected subset of beams and the at least one rotation factors are part of the parameters of the precoder. A wireless device for carrying out this method is also provided.
Claims30
A method for indicating parameters of a precoder from a wireless device to a network node in a wireless communication system, the method comprising:
- determining at least one rotation factor associated with a plurality of orthogonal beams, wherein the at least one rotation factor is used to rotate the plurality of orthogonal beams;
- selecting a subset of beams from the plurality of orthogonal beams;
- and
- sending, to the network node, an indication of the selected subset of beams and the at least one rotation factor, wherein the parameters of the precoder include the indication of the selected subset of beams and the at least one rotation factor.
A wireless device for indicating parameters of a precoder to a network node in a wireless communication system, the wireless device comprising a processing circuitry configured to:
- determine at least one rotation factor associated with a plurality of orthogonal beams, wherein the at least one rotation factor is used to rotate the plurality of orthogonal beams;
- select a subset of beams from the plurality of orthogonal beams;
- and
- send the parameters of the precoder to the network node, the parameters of the precoder including an indication of the selected subset of beams and the at least one rotation factor.
A method for determining transmission parameters for a wireless device in a wireless communication system, the method comprising:
- in response to transmitting reference signals to the wireless device, receiving precoder parameters which include an indication of a subset of beams selected from a plurality of orthogonal beams, and at least one rotation factor associated with the plurality of orthogonal beams, the at least one rotation factor being used to rotate the plurality of orthogonal beams;
- and
- determining the transmission parameters based on the received precoder parameters.
A network node for determining transmission parameters for a wireless device in a wireless communication system, the network node comprising a processing circuitry configured to cause the network to:
- in response to transmitting reference signals to the wireless device, receive precoder parameters which include an indication of a subset of beams selected from a plurality of orthogonal beams, and at least one rotation factor associated with the plurality of orthogonal beams, the at least one rotation factor being used to rotate the plurality of orthogonal beams;
- and
- determine the transmission parameters based on the received precoder parameters.
Dependencies are inferred from the claim text.