公开(公告)号：US20230379822A1

公开(公告)日：2023-11-23

申请号：US17749207

申请日：2022-05-20

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter

IPC: H04W52/02

CPC classification number: H04W52/0229

Abstract: In one aspect, a method includes: enabling, via a controller of a network device, a receiver of the network device for a plurality of receive fragments during a receive duration; analyzing a signal fragment received during at least one of the plurality of receive fragments to identify possible presence of a wake-up frame sent by a coordinator device; and in response to the identification of the possible presence of the wake-up frame, enabling the receiver to receive and detect another wake-up frame.

公开(公告)号：US11811442B2

公开(公告)日：2023-11-07

申请号：US17138850

申请日：2020-12-30

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter

IPC: H04B1/16 ,  H04L27/00 ,  H04B1/18

CPC classification number: H04B1/1638 ,  H04B1/18 ,  H04L27/0008 ,  H04L27/0012

Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving RF signals. The RF receiver includes a plurality of modulation signal detectors (MSDs) to generate a plurality of detection signals when a plurality of RF signals modulated using a plurality of modulation schemes are detected. The RF receiver further includes a controller to cause reception of the plurality of RF signals in response to the plurality of detection signals.

公开(公告)号：US11611360B2

公开(公告)日：2023-03-21

申请号：US16886645

申请日：2020-05-28

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter ,  Güner Arslan ,  Wentao Li ,  Michael Wu

IPC: H04B1/00 ,  H04L27/00 ,  H04B1/16

Abstract: An apparatus comprises an RF receiver for receiving an RF signal. The RF receiver includes front-end circuitry to generate a first down-converted signal, and a plurality of signal detectors to generate a corresponding plurality of detection signals from signals derived from the down-converted signal. The RF receiver further includes a controller to provide at least one control signal to the front-end circuitry based on the plurality of detection signals.

公开(公告)号：US10944617B2

公开(公告)日：2021-03-09

申请号：US15870748

申请日：2018-01-12

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter ,  Euisoo Yoo

IPC: H04L27/36 ,  H04B1/403 ,  H04B1/10 ,  H04L27/38 ,  H04B1/30

Abstract: An apparatus includes a radio-frequency (RF) receiver. The RF receiver includes an analog-to-digital converter (ADC) to convert an analog input signal to a digital output signal in response to an ADC clock signal. The RF receiver further includes a frequency generator to selectively provide either a clock signal to be provided as the ADC clock signal or a signal to be used for in-phase-quadrature (IQ) calibration of the RF receiver.

公开(公告)号：US09720875B2

公开(公告)日：2017-08-01

申请号：US13949837

申请日：2013-07-24

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter ,  Wentao Li

IPC: H04L27/06 ,  G06F13/42 ,  H04L27/22 ,  H04W56/00 ,  H04J3/16

CPC classification number: G06F13/4295 ,  H04J3/1605 ,  H04L27/22 ,  H04W56/00

Abstract: A receiver includes a phase click detector, a controller, and a comparator. The phase click detector detects phase clicks in an input signal, where a phase click corresponds to a change in phase of at least a first threshold. The controller is coupled to the phase click detector for calculating a number of phase clicks within one or more time periods. The comparator compares the number of phase clicks within the one or more time periods, and provides an arrival signal if the number of phase clicks is less than a second threshold.

公开(公告)号：US11962325B2

公开(公告)日：2024-04-16

申请号：US17873844

申请日：2022-07-26

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter

IPC: H03M13/00 ,  H03M13/11

CPC classification number: H03M13/116

Abstract: A system and method for detecting the preamble of a wireless packet is disclosed. The system utilizes one or more received fragments as inputs to a correlator, forming correlator content inside the correlator memory. After every sample from the received fragment is provided to the correlator, the correlator then compares the correlator content to a known pattern pre-programmed as a set of correlation coefficients. The correlation coefficients may not align with the correlator content because the symbol boundaries are not known a-priori. By cyclic rotation of the correlation coefficients relative to the correlator content, or cyclic rotation of the correlator content relative to the known correlation coefficients, a match with one or more preamble symbols may be found. This technique may be used to reduce power during the preamble detection process. Alternatively, this technique can also be used for antenna diversity, multi PHY and multichannel applications.

公开(公告)号：US11770287B2

公开(公告)日：2023-09-26

申请号：US17138846

申请日：2020-12-30

Applicant: Silicon Laboratories Inc.

Inventor： Antonio Torrini ,  Hendricus de Ruijter ,  Yan Zhou ,  David Trager

IPC: H04L27/26 ,  H04L27/00

CPC classification number: H04L27/2657 ,  H04L27/0014 ,  H04L27/2675 ,  H04L2027/0026

Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that uses an estimation of the carrier frequency offset and an estimation of phase differences to remove the carrier frequency offset.

公开(公告)号：US11750360B2

公开(公告)日：2023-09-05

申请号：US15868855

申请日：2018-01-11

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter ,  Wentao Li ,  Lauri Mikael Hintsala

IPC: H04L7/04 ,  H04J3/06 ,  H04W52/02 ,  H04L69/22 ,  H04W4/80

CPC classification number: H04L7/042 ,  H04J3/0658 ,  H04L69/22 ,  H04W52/0229 ,  H04W4/80 ,  Y02D30/70

Abstract: An apparatus includes a radio frequency (RF) receiver to receive packets. The RF receiver includes first and second synchronization field detectors (SFDs). The first and second SFDs detect synchronization headers generated using first and second physical layer (PHY) modes, respectively.

公开(公告)号：US11177993B2

公开(公告)日：2021-11-16

申请号：US16177373

申请日：2018-10-31

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter ,  Wentao Li

IPC: H04L27/26 ,  H04W56/00 ,  H04L27/00 ,  H04L27/38

Abstract: An apparatus includes a radio frequency (RF) receiver. The RF receiver includes a timing correlator and frequency offset estimator. The timing correlator and frequency offset estimator: (a) extracts timing from a set of samples derived from an RF signal, and (b) determines a frequency offset estimate from the set of samples.

公开(公告)号：US20210135692A1

公开(公告)日：2021-05-06

申请号：US16886645

申请日：2020-05-28

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter ,  Güner Arslan ,  Wentao Li ,  Michael Wu

IPC: H04B1/00 ,  H04B1/16 ,  H04L27/00

Abstract: An apparatus comprises an RF receiver for receiving an RF signal. The RF receiver includes front-end circuitry to generate a first down-converted signal, and a plurality of signal detectors to generate a corresponding plurality of detection signals from signals derived from the down-converted signal. The RF receiver further includes a controller to provide at least one control signal to the front-end circuitry based on the plurality of detection signals.