US 12,224,841 B2
Link adaptation for spatial multiplexing
Hamed Farhadi, Stockholm (SE); Ulf Gustavsson, Gothenburg (SE); and Sven Jacobsson, Västra Frölunda (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/618,341
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jun. 12, 2019, PCT No. PCT/SE2019/050557
§ 371(c)(1), (2) Date Dec. 10, 2021,
PCT Pub. No. WO2020/251436, PCT Pub. Date Dec. 17, 2020.
Prior Publication US 2022/0231750 A1, Jul. 21, 2022
Int. Cl. H04B 7/0452 (2017.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01); H04L 1/00 (2006.01)
CPC H04B 7/0697 (2013.01) [H04B 7/0456 (2013.01); H04B 7/063 (2013.01); H04L 1/0003 (2013.01); H04L 1/0009 (2013.01); H04L 1/0023 (2013.01); H04B 7/0452 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A link adaptation method for a transmitter node configured for spatial multiplexing of signals into streams and for transmission of spatially multiplexed streams over one or more forward channels including a first forward channel, wherein each stream is intended for a receiver node, the method comprising:
selecting a transmission pre-coding setting for at least one of the spatially multiplexed streams based on an acquired channel estimate of the first forward channel;
based on the selected transmission pre-coding setting, estimating a forward channel disturbance component, wherein the forward channel disturbance component includes signal distortion for the first forward channel caused by at least one hardware component of the transmitter node and/or the receiver node; and
performing link adaptation for at least one of the spatially multiplexed streams based on the selected transmission pre-coding setting and the estimated forward channel disturbance component, wherein
estimating the forward channel disturbance component comprises estimating a disturbance covariance matrix based on the selected transmission pre-coding setting, the acquired channel estimate of the first forward channel, and a model of the signal distortion for the first forward channel.