US 12,483,306 B2
Low-rank beamformer from multi-layer precoder feedback
Israfil Bahceci, Kanata (CA); and Ahmed Nouah, Ottawa (CA)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/001,165
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jun. 29, 2020, PCT No. PCT/IB2020/056127
§ 371(c)(1), (2) Date Dec. 8, 2022,
PCT Pub. No. WO2022/003391, PCT Pub. Date Jan. 6, 2022.
Prior Publication US 2023/0223995 A1, Jul. 13, 2023
Int. Cl. H04B 7/0417 (2017.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01)
CPC H04B 7/0486 (2013.01) [H04B 7/0417 (2013.01); H04B 7/0634 (2013.01); H04B 7/0639 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A network node configured to communicate with a wireless device, the network node comprising:
processing circuitry configured to:
receive multilayer feedback;
determine a beamformer for transmission of a first quantity of transmission layers, the beamformer being based at least on information, in the multilayer feedback, that is associated with a second quantity of transmission layers, the first quantity of transmission layers being a less than the second quantity of transmission layers, including:
combining the information, in the multilayer feedback, associated with the second quantity of transmission layers, with information associated with the first quantity of transmission layers;
generating matrices based at least on the combined information; and
performing one of a single value decomposition and weight mean vector function based on the matrices to obtain the beamformer for the transmission of the first quantity of transmission layers; and
cause the transmission using the beamformer.