公开(公告)号：US20210006448A1

公开(公告)日：2021-01-07

申请号：US16969704

申请日：2018-02-13

Applicant: ABB Schweiz AG

Inventor： PANG Zhibo ,  Michele Luvisotto ,  Dacfey Dzung

IPC: H04L27/26

Abstract: A method for packet detection in a wireless communication network employing time based scheduling of packets. The method is performed by a packet receiver in the wireless communication network. The method includes receiving a packet from a packet transmitter. The packet includes a preamble that is composed of a single orthogonal frequency-division multiplexing (OFDM) symbol and represented by a sequence of samples. T least part of the preamble is received within a packet detection window. Packet detection is performed in order to find a start of the packet only on those samples received within the packet detection window.

公开(公告)号：US20190036745A1

公开(公告)日：2019-01-31

申请号：US16055310

申请日：2018-08-06

Applicant: ABB Schweiz AG

Inventor： Dacfey Dzung

IPC: H04L25/03 ,  H04L25/02

CPC classification number: H04L25/03159 ,  H04L25/0212 ,  H04L25/0228

Abstract: The present invention is concerned with Cosine Modulated Filter Band modulation, in particular for a matrix equalizer for equalising a modulated signal carrying digital data, wherein the signal is modulated using a CMF6 and transmitted through a transmission channel having a channel impulse response c(t), wherein the matrix equalizer comprises: matrix coefficients W(i) determined based on the discrete-time matrix channel impulse response C(i) that is determined from the channel impulse response c(t); wherein the matrix equalizer is configured to equalize the modulated signal in order to reduce signal distortion introduced by the transmission channel. The present invention also concerns a method for equalising the CMFB modulated signal.

公开(公告)号：US20180048457A1

公开(公告)日：2018-02-15

申请号：US15797493

申请日：2017-10-30

Applicant: ABB Schweiz AG

Inventor： Dacfey Dzung ,  Trond Loekstad

IPC: H04L7/00

CPC classification number: H04L7/0037 ,  H04J3/0667 ,  H04L67/42

Abstract: The present invention is directed towards a method, a system, and a device which allow an improved synchronization of a system-wide timing information over a network. Hence, slave clocks can be synchronized to a high quality clock, such as a master clock.

公开(公告)号：US10574489B2

公开(公告)日：2020-02-25

申请号：US16055310

申请日：2018-08-06

Applicant: ABB Schweiz AG

Inventor： Dacfey Dzung

IPC: H03H7/30 ,  H04L25/03 ,  H04L25/02

Abstract: The present invention is concerned with Cosine Modulated Filter Band modulation, in particular for a matrix equalizer for equalising a modulated signal carrying digital data, wherein the signal is modulated using a CMF6 and transmitted through a transmission channel having a channel impulse response c(t), wherein the matrix equalizer comprises: matrix coefficients W(i) determined based on the discrete-time matrix channel impulse response C(i) that is determined from the channel impulse response c(t); wherein the matrix equalizer is configured to equalize the modulated signal in order to reduce signal distortion introduced by the transmission channel. The present invention also concerns a method for equalising the CMFB modulated signal.

公开(公告)号：US20210006449A1

公开(公告)日：2021-01-07

申请号：US16969715

申请日：2018-02-13

Applicant: ABB Schweiz AG

Inventor： PANG Zhibo ,  Michele Luvisotto ,  Dacfey Dzung

IPC: H04L27/26

Abstract: A method is used for frequency offset estimation in a wireless communication network that employs time based scheduling of packets. The method is performed by a packet receiver in the wireless communication network. The method includes receiving a packet from a packet transmitter. The packet includes a preamble that is composed of samples of a single orthogonal frequency-division multiplexing symbol. The preamble has a cyclic prefix (CP) defined by a repetition of samples from an end-portion of the preamble and the preamble, except for the CP, is free from any repeated sequence of samples. The method also includes determining a sequence of similarity measure values between the CP of the preamble and the end-portion of the preamble, applying a low-pass filter to the sequence of similarity measure values, resulting in a filtered sequence of similarity measure values, and performing frequency offset estimation on the filtered sequence of similarity measure values.

公开(公告)号：US10164762B2

公开(公告)日：2018-12-25

申请号：US15797493

申请日：2017-10-30

Applicant: ABB Schweiz AG

Inventor： Dacfey Dzung ,  Trond Loekstad

IPC: H04L7/00 ,  H04J3/06 ,  H04L29/06

Abstract: The present invention is directed towards a method, a system, and a device which allow an improved synchronization of a system-wide timing information over a network. Hence, slave clocks can be synchronized to a high quality clock, such as a master clock.