公开(公告)号：US20220271979A1

公开(公告)日：2022-08-25

申请号：US17670889

申请日：2022-02-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Wouter LANNEER ,  Yannick LEFEVRE ,  Paschalis TSIAFLAKIS ,  Werner COOMANS

IPC: H04L25/03 ,  H04L25/02

Abstract: The present disclosure relates to an equalizer training unit for deriving equalization parameters for compensating data-dependent distortion in received samples by use of a training sequence including a sequence p>1 times and cyclically comprising N sub-sequences of respective combinations of L time-domain symbols of a modulation scheme, wherein the N sub-sequences are cyclically arranged in a selected order and such that L−1 symbols of a respective sub-sequence overlap with symbols in the preceding and following sub-sequences. The present disclosure further relates to a training sequence generator unit for generative the training sequence and an equalizer employing the equalizer training unit.

公开(公告)号：US20240113790A1

公开(公告)日：2024-04-04

申请号：US18477999

申请日：2023-09-29

Applicant: Nokia Solutions and Networks Oy

Inventor： Michiel VERPLAETSE ,  Yannick LEFEVRE ,  Wouter LANNEER

IPC: H04B10/61 ,  H04Q11/00

CPC classification number: H04B10/616 ,  H04Q11/0067

Abstract: In one embodiment, the apparatus includes at least one memory configured to store instructions; and at least one processor configured to execute the instructions and cause the apparatus to perform, receiving, by a receiver in an Optical Line Terminal, OLT, a burst of an upstream signal transmitted in burst mode, adjusting settings for an analog signal conditioning of the received upstream signal; performing the analog signal conditioning of the received upstream signal based on the adjusted settings such that a first compensated signal is provided, obtaining coefficient(s) for a digital signal conditioning of the first compensated signal; performing the digital signal conditioning of the first compensated signal based on the obtained coefficient(s) such that a second compensated signal is provided.

公开(公告)号：US20240322913A1

公开(公告)日：2024-09-26

申请号：US18610432

申请日：2024-03-20

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick LEFEVRE ,  Michiel VERPLAETSE ,  Wouter LANNEER

IPC: H04B10/69 ,  H04B10/079 ,  H04B10/27

CPC classification number: H04B10/6971 ,  H04B10/0795 ,  H04B10/27

Abstract: The present invention discloses an apparatus, comprising means for: determining a rate for a received signal in a passive optical network, PON; selecting, based on the determined rate, a set of coefficients for an equalizer from a plurality of predetermined sets of coefficients for the equalizer, wherein, the plurality of predetermined sets respectively corresponds to a plurality of rates; equalizing the received signal with the equalizer based on the selected set of coefficients, obtaining an equalized signal.

公开(公告)号：US20230100191A1

公开(公告)日：2023-03-30

申请号：US17949553

申请日：2022-09-21

Applicant: Nokia Solutions and Networks Oy

Inventor： Yannick LEFEVRE ,  Wouter LANNEER ,  Werner COOMANS

IPC: H04Q11/00 ,  H04J14/02

Abstract: The method includes sending a first frame of a first modulation format that is suitable for a first group of receivers before sending a second frame of a second modulation format that is suitable for a second group of receivers, wherein the first modulation format is a higher modulation format than the second modulation format, and wherein the method further includes inserting into the first frame at least one symbol of the second modulation format at at least one outer edge of the first frame.

公开(公告)号：US20210242952A1

公开(公告)日：2021-08-05

申请号：US17142994

申请日：2021-01-06

Applicant: Nokia Solutions and Networks Oy

Inventor： Wouter LANNEER ,  Paschalis TSIAFLAKIS

IPC: H04J1/12 ,  H04J11/00

Abstract: Example embodiments describe means (200) for performing i) pre-compensating (210, N sets of K1 tone data values (220) for crosstalk between N communication lines; the N sets of K1 tone data values pertaining to respective N terminal nodes of a digital communication system; ii) calculating (215) from the pre-compensated N sets of K1 tone data values (221) N sets of first time domain symbols (225); iii) calculating (283) a second time domain symbol (284) from a set of K2 tones values (280); the K2 tone data values pertaining to a selected one of the N terminal nodes; and iv) adding (212) the second time domain symbol in a weighted manner to the first time domain symbols such that the second time domain symbol is added to the first time domain symbol for the selected terminal node and to at least one other of the first time domain symbols for the respective other terminal nodes.