US 11,855,814 B2
De-ICI filter estimation for phase noise mitigation
Dennis Hui, Sunnyvale, CA (US); Mehrnaz Afshang, Fremont, CA (US); Jung-Fu Cheng, Fremont, CA (US); and Stephen Grant, Pleasanton, CA (US)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 18/020,080
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Aug. 7, 2021, PCT No. PCT/IB2021/057297
§ 371(c)(1), (2) Date Feb. 6, 2023,
PCT Pub. No. WO2022/029733, PCT Pub. Date Feb. 10, 2022.
Claims priority of provisional application 63/063,105, filed on Aug. 7, 2020.
Prior Publication US 2023/0216715 A1, Jul. 6, 2023
Int. Cl. H04L 5/12 (2006.01); H04L 25/03 (2006.01); H04L 5/00 (2006.01)
CPC H04L 25/03821 (2013.01) [H04L 5/0041 (2013.01); H04L 2025/03414 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method performed by a wireless device, the method comprising:
receiving a wireless signal Rk over all subcarriers allocated to the wireless device, the signal Rk comprising a phase tracking reference signal (PT-RS) on a subset of subcarriers allocated to the wireless device and the subset comprises at least one non-contiguous subcarrier;
computing a de-inter-carrier interference (ICI) filter based on the PT-RS and a channel estimate using a convolutional matrix CR of the received signal Rk; and
applying the de-ICI filter to the received signal Rk to generate a de-ICI filtered signal.