公开(公告)号：US20210367722A1

公开(公告)日：2021-11-25

申请号：US17393790

申请日：2021-08-04

Applicant: NEWRACOM, Inc.

Inventor： Sichan NOH ,  Yujin NOH ,  Jong-ee OH ,  Min Seoung KIM ,  Dae Kyun LEE ,  Youngjae JUNG ,  Hyobin YIM ,  Jaeyoung RYU

IPC: H04L5/00 ,  H04L1/00

Abstract: A method for encoding a bitstream is described. The method includes receiving, by an error correction unit, the bitstream; performing, by the error correction unit, encoding on the bitstream to generate an encoded bit stream that includes the bitstream and parity bits; processing, by a constellation unit, the encoded bitstream to generate constellation points in one or more encoded streams; determining, by a low-density parity-check (LDPC) tone mapper, a distance between subcarriers in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of the frame; and performing, by the LDPC tone mapper, LDPC tone mapping based on the one or more encoded streams and on the determined distance to generate a permuted stream of complex numbers, wherein the distance between subcarriers is determined to be either (1) 18 for a first resource unit size used in the frame and (2) 20 for a second resource unit size used in the frame.

公开(公告)号：US20210044398A1

公开(公告)日：2021-02-11

申请号：US16988613

申请日：2020-08-08

Applicant: NEWRACOM, Inc.

Inventor： Sichan NOH ,  Yujin NOH ,  Jong-ee OH ,  Min Seoung KIM ,  Dae Kyun LEE ,  Youngjae JUNG ,  Hyobin YIM ,  Jaeyoung RYU

IPC: H04L5/00 ,  H04L1/00

Abstract: A method for encoding a bitstream is described. The method includes receiving, by an error correction unit, the bitstream; performing, by the error correction unit, encoding on the bitstream to generate an encoded bit stream that includes the bitstream and parity bits; processing, by a constellation unit, the encoded bitstream to generate constellation points in one or more encoded streams; determining, by a low-density parity-check (LDPC) tone mapper, a distance between subcarriers in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of the frame; and performing, by the LDPC tone mapper, LDPC tone mapping based on the one or more encoded streams and on the determined distance to generate a permuted stream of complex numbers, wherein the distance between subcarriers is determined to be either (1) 18 for a first resource unit size used in the frame and (2) 20 for a second resource unit size used in the frame.

公开(公告)号：US20210013898A1

公开(公告)日：2021-01-14

申请号：US16926261

申请日：2020-07-10

Applicant: NEWRACOM, Inc.

Inventor： Ryunwoo KIM ,  Seungyun LEE ,  Jaeyoung RYU ,  Jeongki CHOI ,  Jonghoon PARK ,  Changhun SONG

IPC: H03M1/40 ,  H03M1/10

Abstract: A method is described that is performed by a calibration system. The method includes determining a set of perturbation values for configuring an analog-to-digital converter of the calibration system; generating a set of digital test values for determining the accuracy of the analog-to-digital converter; and applying the set of perturbation values to the set of digital test values to generate a set of modified test values, wherein the set of perturbation values are digital values that are applied to the set of digital test values in the digital domain.