US 11,817,973 B2
Method and receiving node for determining channel window length
Zhao Wang, Solna (SE); and Efthymios Stathakis, Stockholm (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/419,038
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Jan. 4, 2019, PCT No. PCT/SE2019/050006
§ 371(c)(1), (2) Date Jun. 28, 2021,
PCT Pub. No. WO2020/141988, PCT Pub. Date Jul. 9, 2020.
Prior Publication US 2022/0078048 A1, Mar. 10, 2022
Int. Cl. H04L 25/02 (2006.01); H04L 27/26 (2006.01)
CPC H04L 25/0216 (2013.01) [H04L 25/0228 (2013.01); H04L 27/261 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method performed by a receiving node for determining a channel window length (l ) for a transformed domain channel estimator, the channel window length (l ) to be applied for a particular reference signal, RS, carrying symbol, the method comprising:
obtaining at least two subsets (A1, A2, . . . ) of RS carrying symbols out of a set of RS carrying symbols ({S1, S2, . . . }) received at the receiving node, the particular RS carrying symbol being comprised in at least one of the at least two subsets (A1, A2, . . . ) of RS carrying symbols;
determining, for the at least one of the at least two subsets (A1, A2, . . . ) of RS carrying symbols, a corresponding hypothesis channel window length (l*) based on a set of channel responses, each channel response in said set of channel responses corresponding to a respective RS carrying symbol of said at least one of the at least two subsets (A1, A2, . . . ) of RS carrying symbols, determining the corresponding hypothesis channel window length (l*) for the at least one of the at least two subsets (A1, A2, . . . ) of RS carrying symbols performed by: 1) calculating a likelihood of each hypothesis channel window length (l) in a set of hypothesis channel window lengths based on samples, taken in the RS carrying symbols comprised in the at least one of the at least two subsets (A1, A2, . . . ) of RS carrying symbols, within the respective hypothesis channel window length (l), and 2) selecting, as the corresponding hypothesis channel window length (l*) for the at least one of the at least two subsets (A1, A2, . . . ) of RS carrying symbols, the hypothesis channel window length with highest likelihood, out of the set of hypothesis channel window lengths; and
determining the channel window length (l ) for the particular RS carrying symbol comprised in the at least one of the at least two subsets (A1, A2, . . . ) of RS carrying symbols based on the determined corresponding hypothesis channel window length (l*).