US 12,463,847 B2
Channel estimation technique
Gustav Almquist, Järfälla (SE); Jung-Fu Cheng, Fremont, CA (US); and Stephen Grant, Pleasanton, CA (US)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/290,380
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed May 13, 2022, PCT No. PCT/EP2022/063090
§ 371(c)(1), (2) Date Nov. 13, 2023,
PCT Pub. No. WO2022/238574, PCT Pub. Date Nov. 17, 2022.
Claims priority of provisional application 63/189,008, filed on May 14, 2021.
Prior Publication US 2024/0250850 A1, Jul. 25, 2024
Int. Cl. H04L 25/02 (2006.01); H04L 5/00 (2006.01)
CPC H04L 25/0204 (2013.01) [H04L 5/0007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of performing channel estimation for a radio channel between a transmitter and a receiver of a radio access network (RAN), the method performed by the receiver and comprising or initiating the steps of:
performing an initial channel estimation of the radio channel for each of a plurality of frequency ranges, based on a radio signal received on the radio channel from the transmitter, the radio signal comprising a signal sequence out of a set of signal sequences in each of the frequency ranges, wherein a result of the initial channel estimation comprises, for each of the frequency ranges, an initial channel estimate for the respective one of the frequency ranges, and wherein the frequency ranges are ranges over which signal sequences out of the set of signal sequences are orthogonal; and
applying a filter to the initial channel estimates for the frequency ranges, a length of the filter with respect to frequency being greater than lengths of the frequency ranges, wherein a result of the filter comprises, for each of the frequency ranges, a filtered channel estimate for all subcarriers in the respective one of the frequency ranges.