Granted Patent B2

US 12,375,136 · App. 18/427,162 · Granted Jul 29, 2025

Inventors: Sebastian Faxér (Stockholm, SE); Mattias Frenne (Uppsala, SE)

Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

H04B7/0469H04B7/0639H04B7/065

Abstract

Claims (28)

1. A method performed by a wireless communication device configured for use in a wireless communication system, the method comprising:

determining, based on a structural property of a multi-panel antenna array describing how the multi-panel antenna array is structured into multiple panels, a precoder matrix to recommend to a transmit radio network node for applying to a transmission from the multi-panel antenna array, wherein, through the determined precoder matrix, for the multiple panels, a panel-specific complex weight is applied to all antenna ports corresponding to that panel, wherein the panel-specific complex weight is a phase shift with unitary amplitude, wherein, through the determined precoder matrix, antenna ports corresponding to different panels are combined onto a same transmission layer; and

transmitting signaling indicating the determined precoder matrix to the transmit radio network node.

2. The method of claim 1 , further comprising receiving signaling indicating the structural property.

3. The method of claim 1 , wherein the signaling is radio resource control signaling.

4. The method of claim 1 , wherein the determined precoder matrix is determined from an inter-panel precoding codebook, and wherein the inter-panel precoding codebook is a Discrete Fourier Transform (DFT) codebook.

5. The method of claim 1 , wherein, through the determined precoder matrix, panels of the multi-panel antenna array are co-phased.

6. The method of claim 1 , wherein the structural property includes a total number of the multiple panels into which the multi-panel antenna array is structured.

7. The method of claim 1 , wherein, through the determined precoder matrix, a phase offset is applied between antenna ports corresponding to different panels that differs from a phase offset applied to antenna ports corresponding to a same panel.

8. A method implemented by a transmit radio network node configured for transmitting via a multi-panel antenna array in a wireless communication system, the method comprising:

transmitting to a wireless communication device signaling indicating a structural property of the multi-panel antenna array describing how the multi-panel antenna array is structured into multiple panels;

responsive to transmitting said signaling, receiving from the wireless communication device signaling indicating a precoder matrix that the wireless communication device recommends to the transmit radio network node for applying to a transmission from the multi-panel antenna array, wherein, through the indicated precoder matrix, for the multiple panels, a panel-specific complex weight is applied to all antenna ports corresponding to that panel, wherein the panel-specific complex weight is a phase shift with unitary amplitude, wherein, through the indicated precoder matrix, antenna ports corresponding to different panels are combined onto a same transmission layer; and

precoding a transmission from the multi-panel antenna array using the recommended precoder matrix.

9. The method of claim 8 , wherein the recommended precoder matrix is determined from an inter-panel precoding codebook, wherein the inter-panel precoding codebook is a Discrete Fourier Transform (DFT) codebook.

10. The method of claim 8 , wherein the signaling is radio resource control signaling.

11. The method of claim 8 , wherein, through the recommended precoder matrix, panels of the multi-panel antenna array are co-phased.

12. The method of claim 11 , wherein the structural property includes a total number of the multiple panels into which the multi-panel antenna array is structured.

13. The method of claim 8 , wherein, through the recommended precoder matrix, a phase offset is applied between antenna ports corresponding to different panels that differs from a phase offset applied to antenna ports corresponding to a same panel.

14. A wireless communication device configured for use in a wireless communication system, the wireless communication device comprising:

processing circuitry; and

memory comprising instructions executable by the processing circuitry whereby the wireless communication device is configured to:

determine, based on a structural property of a multi-panel antenna array describing how the multi-panel antenna array is structured into multiple panels, a precoder matrix to recommend to a transmit radio network node for applying to a transmission from the multi-panel antenna array, wherein, through the determined precoder matrix, for the multiple panels, a panel-specific complex weight is applied to all antenna ports corresponding to that panel, wherein the panel-specific complex weight is a phase shift with unitary amplitude, wherein, through the determined precoder matrix, antenna ports corresponding to different panels are combined onto a same transmission layer; and

signal the determined precoder matrix to the transmit radio network node.

15. A transmit radio network node configured for use in transmitting via a multi-panel antenna array in a wireless communication system, the transmit radio network node comprising:

processing circuitry and memory, the memory comprising instructions executable by the processing circuitry whereby the transmit radio network node is configured to:

transmit to a wireless communication device signaling indicating a structural property of the multi-panel antenna array describing how the multi-panel antenna array is structured into multiple panels;

responsive to transmitting said signaling, receive from the wireless communication device signaling indicating a precoder matrix that the wireless communication device recommends to the transmit radio network node for applying to a transmission from the multi-panel antenna array, wherein, through the indicated precoder matrix, for the multiple panels, a panel-specific complex weight is applied to all antenna ports corresponding to that panel, wherein the panel-specific complex weight is a phase shift with unitary amplitude, wherein, through the indicated precoder matrix, antenna ports corresponding to different panels are combined onto a same transmission layer; and

precode a transmission from the multi-panel antenna array using the recommended precoder matrix.

Assignments (1)

Continuity (5)

References Cited (38)