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1. 发明授权

US09991933B2 Attenuator and signal generator for stepwise attenuating a radio frequency signal 有权
公开(公告)号：US09991933B2
公开(公告)日：2018-06-05
申请号：US14714688
申请日：2015-05-18
申请人： Rohde & Schwarz GmbH & Co. KG
发明人： Simon Schmid
IPC分类号： H03H7/24 , H04B3/466
CPC分类号： H04B3/466 , H03H7/24 , H03H7/25
摘要： The invention relates to an attenuator for stepwise attenuating a radio frequency signal. The attenuator comprises a first attenuation module that is configured to stepwise attenuate a radio frequency signal within a first signal frequency range. The attenuator comprises a second attenuation module that is configured to stepwise attenuate a radio frequency signal with a second signal frequency range, wherein the second attenuation module is arranged in parallel to the first attenuation module. The attenuator further comprises a switching element, wherein the switching element switches either the first attenuation module or the second attenuation module to an output node of the attenuator.

2. 发明申请

US20210126725A1 DECISION FEEDBACK EQUALIZATION CORRECTION OF EYE SCOPE MEASUREMENTS 有权
公开(公告)号：US20210126725A1
公开(公告)日：2021-04-29
申请号：US17142014
申请日：2021-01-05
申请人： Kandou Labs SA
发明人： Richard Simpson
IPC分类号： H04B17/364 , H04L7/00 , H04L7/04 , H04L25/02 , H04L1/00 , H04L25/03 , H04B3/466 , H04L25/06
摘要： Methods and systems are described for obtaining a plurality of BER-specific correction values by comparing a first set of BER values obtained by sampling, at a sampling instant near the center of a signaling interval, a non-DFE corrected received signal with a second set of BER values obtained by sampling a DFE-corrected received signal at the sampling instant. A set of eye-scope BER measurements are obtained, each eye-scope BER measurement having a sampling offset relative to the sampling instant, a voltage offset value representing a voltage offset applied to alter a decision threshold, and an eye-scope BER value. A set of DFE-adjusted eye-scope BER measurements are generated by using BER-specific correction values to adjust the voltage offset values of the eye-scope BER measurements.

3. 发明授权

US10673548B2 Decision feedback equalization correction of eye scope measurements 审中-公开
公开(公告)号：US10673548B2
公开(公告)日：2020-06-02
申请号：US16214009
申请日：2018-12-07
申请人： Kandou Labs, S.A.
发明人： Richard Simpson
IPC分类号： H04L7/00 , H04B17/364 , H04L7/04 , H04L25/02 , H04L1/00 , H04L25/03 , H04B3/466 , H04L25/06 , G06F11/32
摘要： Methods and systems are described for obtaining a plurality of BER-specific correction values by comparing a first set of BER values obtained by sampling, at a sampling instant near the center of a signaling interval, a non-DFE corrected received signal with a second set of BER values obtained by sampling a DFE-corrected received signal at the sampling instant. A set of eye-scope BER measurements are obtained, each eye-scope BER measurement having a sampling offset relative to the sampling instant, a voltage offset value representing a voltage offset applied to alter a decision threshold, and an eye-scope BER value. A set of DFE-adjusted eye-scope BER measurements are generated by using BER-specific correction values to adjust the voltage offset values of the eye-scope BER measurements.

4. 发明申请

US20180278282A1 DYNAMIC DIGITAL COMMUNICATION SYSTEM CONTROL 审中-公开
公开(公告)号：US20180278282A1
公开(公告)日：2018-09-27
申请号：US15838684
申请日：2017-12-12
申请人： The Board of Trustees of the Leland Stanford Junior University
发明人： Georgios Ginis , Wei Yu , Chaohuang Zeng , John M. Cioffi
IPC分类号： H04B1/10 , H04M11/06 , H04B3/487 , H04L7/00 , H04L27/26 , H04B3/32 , H04B3/46 , H04L5/00 , H04B15/00 , H04B3/466
CPC分类号： H04B1/1081 , H04B1/10 , H04B1/1027 , H04B3/32 , H04B3/46 , H04B3/466 , H04B3/487 , H04B15/00 , H04B2001/1045 , H04L5/0007 , H04L5/0037 , H04L5/0046 , H04L5/006 , H04L5/0094 , H04L7/0016 , H04L27/2608 , H04M11/062
摘要： Control of a digital communication system having a plurality of communication lines on which signals are transmitted and received is implemented using a variety of methods and systems. According to one embodiment of the present invention, a method is implemented where the signals are affected by interference during transmission and each of the communication lines has at least one transmitter and at least one receiver. A model is created of the interference characteristics due to the signals carried on the communication lines. Interference characteristics for a line are determined based on the model and actual signals carried on other communication lines different from the line for which the characteristics are being determined. Actual interference is compensated for on the communication line using the determined interference characteristics.

5. 发明授权

US09985688B2 Method for processing a signal coming from a transmission channel 有权
公开(公告)号：US09985688B2
公开(公告)日：2018-05-29
申请号：US15042326
申请日：2016-02-12
申请人： STMICROELECTRONICS (ROUSSET) SAS
发明人： Pierre Demaj , Yoann Bouvet
IPC分类号： H04B3/54 , H04B3/466 , H04L5/00 , H04L25/02 , H04L27/26
CPC分类号： H04B3/544 , H04B3/466 , H04B3/542 , H04B2203/5495 , H04L5/006 , H04L25/023 , H04L27/2649
摘要： A method is for processing a channel analog signal coming from a transmission channel. The method may include converting the channel analog signal into a channel digital signal, and detecting a state of the transmission channel based on the channel digital signal to detect whether the transmission channel is, over an interval of time, one or more of linear and time invariant and linear and cyclostationary.

6. 发明授权

US09969024B2 Systems and methods for measuring characteristics of a welding cable 有权
公开(公告)号：US09969024B2
公开(公告)日：2018-05-15
申请号：US14575671
申请日：2014-12-18
申请人： ILLINOIS TOOL WORKS INC.
发明人： Marc Lee Denis
IPC分类号： B23K9/10 , B23K9/095 , H04B3/10 , B23K9/12 , H04B3/54 , B23K9/32 , H04B3/466 , H04B3/48
CPC分类号： B23K9/1043 , B23K9/095 , B23K9/0956 , B23K9/1006 , B23K9/1062 , B23K9/124 , B23K9/32 , H04B3/10 , H04B3/466 , H04B3/48 , H04B3/54
摘要： A welding system having a welding power supply and a processor is provided. The welding power supply is configured to provide a welding power for a welding application through a weld cable. The processor is disposed within the welding power supply and the processor is configured to transmit and receive data related to a welding operating parameter through the weld cable. The processor is also configured to determine an equalization filter coefficient related to the weld cable.

7. 发明申请

US20160043772A1 METHOD AND APPARATUS FOR SENSING NOISE SIGNALS IN A WIRELINE COMMUNICATIONS ENVIRONMENT 有权
标题翻译：用于在线通信环境中感知噪声信号的方法和装置
公开(公告)号：US20160043772A1
公开(公告)日：2016-02-11
申请号：US14887127
申请日：2015-10-19
申请人： QUALCOMM Incorporated
发明人： Laurent Francis Alloin , William Edward Keasler, JR. , Laurent Pierrugues , Arnold Muralt
IPC分类号： H04B3/466
CPC分类号： H04B3/32 , H04B3/46 , H04B3/466 , H04B3/487 , H04L12/2856
摘要： The present invention relates to methods and apparatuses for sensing noise sources in a wireline communications environment such as a customer premises environment in a DSL system. In embodiments, the invention includes an additional sensor that is connected to power mains in a DSL customer premises environment either to characterize, at their source, noises coupling into the DSL lines, and/or to mitigate their impact into the DSL lines. One objective is associated with diagnostics that help to better characterize the noise signals themselves and derive correlation of signals sensed from the power mains and their possible projection onto the DSL line. Another objective makes use of these power line sensor signals to mitigate or to eliminate power line noises that make their way onto the DSL line. Example embodiments further include and exploit signals from additional secondary sensors such as secondary common mode, differential mode and phantom mode sensors.
摘要翻译：本发明涉及用于感测DSL系统中诸如客户端环境之类的有线通信环境中的噪声源的方法和装置。在实施例中，本发明包括附加传感器，其连接到DSL客户驻地环境中的电源，以便在其源处表征耦合到DSL线路中的噪声和/或减轻其对DSL线路的影响。一个目标与诊断相关联，有助于更好地表征噪声信号本身，并导出从电力总管感测到的信号及其可能的投影到DSL线路上的相关性。另一个目标是利用这些电力线传感器信号来减轻或消除使其进入DSL线路的电力线路噪声。示例性实施例还包括和利用来自附加次级传感器的信号，例如次共模，差模和幻影模式传感器。

8. 发明授权

US10763976B1 Digital low frequency correction circuit and method for reducing low frequency disturbances within a digital signal 有权
公开(公告)号：US10763976B1
公开(公告)日：2020-09-01
申请号：US16351847
申请日：2019-03-13
申请人： Rohde & Schwarz GmbH & Co. KG
发明人： Andrew Schaefer , Andreas Maier , Detlef Schlager
IPC分类号： H04B3/466 , H04B17/00 , H04B15/00 , H04B1/16 , H04L25/03
摘要： The invention relates to a digital low frequency correction circuit and a corresponding method for correction of low frequency disturbances within a digital signal, in particular to a reduction of distortions caused by analog circuitry, such as analog signal amplifiers. The low frequency correction circuit comprises a main signal path adapted to delay a digital input signal received by a signal input terminal and at least one correction signal path including a digital correction filter adapted to filter the received digital input signal. Furthermore, an adder of the circuit is adapted to add the digital signal delayed by the main signal path and the digital signal corrected by said correction signal path to generate a digital output signal output by a signal output terminal of the circuit.

9. 发明授权

US10211884B2 Receiver and method for processing a signal coming from a transmission channel 有权
公开(公告)号：US10211884B2
公开(公告)日：2019-02-19
申请号：US15797947
申请日：2017-10-30
申请人： STMicroelectronics (Rousset) SAS
发明人： Yoann Bouvet , Pierre Demaj
IPC分类号： H04B3/54 , H04B3/466 , H04L5/00 , H04L25/02 , H04L27/26
摘要： A method is for processing a channel analog signal coming from a transmission channel. The method may include converting the channel analog signal into a channel digital signal, and detecting a state of the transmission channel based on the channel digital signal to detect whether the transmission channel is, over an interval of time, one or more of linear and time invariant and linear and cyclostationary.

10. 发明授权

US09923599B1 Terahertz injection-locked radiator 有权
公开(公告)号：US09923599B1
公开(公告)日：2018-03-20
申请号：US15492876
申请日：2017-04-20
申请人： City University of Hong Kong
发明人： Quan Xue , Liang Wu
IPC分类号： H04B1/04 , H04B3/06 , H03B19/14 , H01Q21/22 , H04B3/466
CPC分类号： H04B3/06 , H01Q21/20 , H03B5/1215 , H03B5/1228 , H03B5/1852 , H03B27/00 , H03B2200/0074 , H03B2200/0084 , H04B3/466
摘要： Systems and methods which provide injection-locked circuit configurations for radiating signals in the terahertz frequency range with improved phase noise and signal output power are described. Embodiments of the invention provide an injection-locked terahertz radiator system comprising a half-quadrature voltage controlled oscillator (HQVCO), a plurality of injection-locked frequency quadruplers (ILFQs), and antenna elements. In operation according to embodiments, injection-locking provided by the ILFQs may be utilized to facilitate individual optimization of the output power and the phase noise. Intrinsic-delay compensation and harmonic boosting techniques may be utilized in configurations of the foregoing injection-locked terahertz radiator system to optimize the phase noise of the HQVCO and the output power of the ILFQs, respectively. Embodiments of an injection-locked terahertz radiator system herein are implemented as a fully integrated solution with compact form factor, providing high reliability and low cost.

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