公开(公告)号：US20210135755A1

公开(公告)日：2021-05-06

申请号：US17088775

申请日：2020-11-04

申请人： Arcom Digital, LLC

发明人： Victor Zinevich

IPC分类号： H04B10/2575 ,  H04B10/61 ,  H01M8/04664

摘要： A method for monitoring leakage in the aeronautical band of a high split HFC includes providing an apparatus for use in a patrol vehicle, the apparatus including a leak signal receiver coupled to a processor; setting a plurality of coefficients for an OUDP matched filter for a current location of the patrol vehicle; detecting peaks over a detection threshold at an output of the OUDP matched filter; and determining a presence of a leak based on a time stamp and a level of each detected peak. An upstream leak detection system is also described.

公开(公告)号：US20140165126A1

公开(公告)日：2014-06-12

申请号：US14177771

申请日：2014-02-11

申请人： ARCOM DIGITAL, LLC

发明人： Victor M. Zinevich

IPC分类号： H04N21/61 ,  H04N17/00

CPC分类号： H04N21/6168 ,  H04N17/00 ,  H04N21/44209 ,  H04N21/6118

摘要： A handheld leakage detector for finding digital signal leaks in a HFC network, comprises a radio receiver, a leakage receiver, leakage sampler, a correlator, and a display. The radio receiver receives samples of the digital signal taken from the HFC network, called “reference samples.” The leakage receiver receives a leakage signal, which is a leaked version of the digital signal from the HFC network. The leakage sampler samples the leakage signal to form leakage samples. The correlator performs a cross-correlation of the reference samples and the leakage samples, to produce a correlation function. An optimizable value is determined from the correlation function. The value generally becomes more optimized as the detector approaches the leak. The leak is sought by iteratively changing the position of the detector until the value becomes substantially optimized or the leak is found.

摘要翻译： 一种用于在HFC网络中发现数字信号泄漏的手持式泄漏检测器，包括无线电接收器，泄漏接收器，泄漏采样器，相关器和显示器。 无线电接收机接收从HFC网络采集的数字信号样本，称为“参考样本”。泄漏接收器接收来自HFC网络的数字信号的漏泄信号。 泄漏采样器采样泄漏信号形成泄漏样本。 相关器执行参考样本和泄漏样本的互相关，以产生相关函数。 从相关函数确定可优化值。 当检测器接近泄漏时，该值通常会更加优化。 通过迭代地改变检测器的位置来寻求泄漏，直到该值变得基本上被优化或发现泄漏为止。

公开(公告)号：US20130291044A1

公开(公告)日：2013-10-31

申请号：US13456950

申请日：2012-04-26

申请人： Victor M. Zinevich

发明人： Victor M. Zinevich

IPC分类号： H04N21/61

CPC分类号： H04N21/6168 ,  H04N17/00 ,  H04N21/44209 ,  H04N21/6118

摘要： A handheld leakage detector for finding digital QAM signal leaks in a HFC network, comprises a radio receiver, a leakage receiver, leakage sampler, a correlator, and a display. The radio receiver receives samples of the QAM signal taken from the HFC network, called “reference samples.” The leakage receiver receives a QAM leakage signal, which is related to the QAM signal from the HFC network. The leakage sampler samples the leakage signal to form leakage samples. The correlator performs a coherent cross-correlation of the reference samples and the leakage samples, to produce a correlation peak. A value is determined from the correlation peak and displayed on the display. The value generally becomes more optimized as the detector approaches the leak. The leak is sought by iteratively changing the position of the detector until the displayed value becomes substantially optimized or the leak is found.

摘要翻译： 一种用于在HFC网络中发现数字QAM信号泄漏的手持式泄漏检测器，包括无线电接收器，泄漏接收器，泄漏取样器，相关器和显示器。 无线电接收机接收从HFC网络获取的称为“参考样本”的QAM信号样本。 泄漏接收器接收与来自HFC网络的QAM信号相关的QAM泄漏信号。 泄漏采样器采样泄漏信号形成泄漏样本。 相关器执行参考样本和泄漏样本的相干互相关，以产生相关峰值。 从相关峰值确定值并显示在显示器上。 当检测器接近泄漏时，该值通常会更加优化。 通过迭代地改变检测器的位置来寻求泄漏，直到显示的值变得基本上被优化或发现泄漏。

公开(公告)号：US20220200715A1

公开(公告)日：2022-06-23

申请号：US17654284

申请日：2022-03-10

申请人： Arcom Digital, LLC

发明人： Victor Zinevich

IPC分类号： H04B17/354 ,  H04B17/10

摘要： A method for monitoring leakage in an aeronautical band of a high split HFC by a detection and validation of OUDP bursts includes: providing an apparatus for use in a patrol vehicle, the apparatus including a leak signal receiver coupled to a processor; measuring a duration of detected bursts to provide a plurality of burst durations; collecting a histogram of the burst durations during a measuring session to provide a duration histogram; and determining a presence of a leak based on a comparison of the duration histogram with expected durations of OUDP bursts. Systems for monitoring leakage in an aeronautical band of a high split HFC by a detection and validation OUDP bursts, and other methods for monitoring leakage in an aeronautical band of a high split HFC by a detection and validation OUDP bursts are also described.

公开(公告)号：US10333616B1

公开(公告)日：2019-06-25

申请号：US16125824

申请日：2018-09-10

申请人： ARCOM DIGITAL, LLC

发明人： Victor M. Zinevich

IPC分类号： H04B10/00 ,  H04B10/079 ,  H04B10/2507 ,  H04B10/2575 ,  H04J14/00

CPC分类号： H04B10/0795 ,  G01R23/20 ,  G01R31/2822 ,  H04B3/487 ,  H04B10/2507 ,  H04B10/25751 ,  H04L1/248 ,  H04M3/304

摘要： Detecting PIM in a downstream signal, wherein the downstream signal is received from a cable plant via a subscriber network and an upstream signal is transmitted to the cable plant via the subscriber network. The upstream signal is transmitted in bursts during active intervals. PIM arises from an interaction between the upstream signal and a nonlinear component in the subscriber network and occurs in bursts corresponding to the upstream signal. The detection steps are: (a) identifying the potentially affected downstream signal from the upstream signal; (b) receiving the downstream signal during an active interval; (c) measuring a metric of the downstream signal to obtain an active value; (d) receiving the downstream signal during a quiet interval; (e) measuring the metric of the downstream signal to obtain a quiet value; (f) comparing active and quiet values; and (g) determining whether PIM distortion has been detected based on the comparison.

公开(公告)号：US09882668B2

公开(公告)日：2018-01-30

申请号：US14855643

申请日：2015-09-16

申请人： ARCOM DIGITAL, LLC

发明人： Victor M. Zinevich

IPC分类号： H04L12/26 ,  H04J11/00 ,  H04L27/26 ,  H04B3/54 ,  H04L12/28 ,  H04N21/2383 ,  H04N21/438 ,  H04N21/442 ,  H04N21/61

CPC分类号： H04J11/0023 ,  H04B3/542 ,  H04J2011/0096 ,  H04L12/2801 ,  H04L27/2663 ,  H04N21/2383 ,  H04N21/4382 ,  H04N21/44209 ,  H04N21/6118

摘要： Detection of OFDM signals leaking from an HFC network with CCAP architecture is presented. Leak detection includes creating signatures of the OFDM signals and using them in an adaptive coherent cross-correlation processing method. The signature is created at a server and then transmitted to a field leakage detector via a wireless network. The server constructs signatures based on modulation and other parameters of the OFDM signal. The detector adaptively selects valid signatures depending on the location of the detector. A cross-correlation receiver samples the OFDM leakage signal in synchronism with a GPS clock and an OFDM master clock at a CMTS. Capture of the OFDM leakage signal in the detector is synchronized with the symbol rate and timestamp of the OFMD signal to achieve time delay measurements of the leak signal at different locations of the detector. Then, the leak is located using known TDOA or network database methods.

公开(公告)号：US09414126B1

公开(公告)日：2016-08-09

申请号：US14642579

申请日：2015-03-09

申请人： Victor M. Zinevich

发明人： Victor M. Zinevich

IPC分类号： H04N17/00 ,  H04N21/647 ,  H04N21/61

CPC分类号： H04N17/004 ,  H04B3/46

摘要： Detecting a linear impairment in a cable under test by using a random signal transmitted down the cable. The impairment causes a reflected signal to be combined with the random signal. The combined signal extends over a plurality of sub-bands. A method and apparatus perform the steps of: (a) receiving the combined signal from a test point upstream from the impairment; (b) tuning to each sub-band and receiving a part of the combined signal within each sub-band; (c) determining an autocorrelation function of each part of the combined signal of each sub-band, to produce a plurality of autocorrelation functions; (d) combining the autocorrelation functions to form a combined function; (e) detecting the reflected signal from the combined function; and (f) determining, from the combined function, a time delay associated with the reflected signal and the distance from the test point to the impairment.

摘要翻译： 通过使用沿电缆传输的随机信号检测被测电缆的线性损伤。 该损伤使得反射信号与随机信号组合。 组合信号在多个子带上延伸。 方法和装置执行以下步骤：（a）从损伤上游的测试点接收组合信号; （b）调整每个子带并接收每个子带内的组合信号的一部分; （c）确定每个子带的组合信号的每个部分的自相关函数，以产生多个自相关函数; （d）组合自相关函数以形成组合函数; （e）检测来自组合功能的反射信号; 和（f）从组合功能确定与反射信号相关联的时间延迟以及从测试点到损伤的距离。

公开(公告)号：US09038119B2

公开(公告)日：2015-05-19

申请号：US14177771

申请日：2014-02-11

申请人： ARCOM DIGITAL, LLC

发明人： Victor M. Zinevich

IPC分类号： H04N7/173 ,  H04N21/61 ,  H04N17/00 ,  H04N21/442

CPC分类号： H04N21/6168 ,  H04N17/00 ,  H04N21/44209 ,  H04N21/6118

摘要： A handheld leakage detector for finding digital signal leaks in a HFC network, comprises a radio receiver, a leakage receiver, leakage sampler, a correlator, and a display. The radio receiver receives samples of the digital signal taken from the HFC network, called “reference samples.” The leakage receiver receives a leakage signal, which is a leaked version of the digital signal from the HFC network. The leakage sampler samples the leakage signal to form leakage samples. The correlator performs a cross-correlation of the reference samples and the leakage samples, to produce a correlation function. An optimizable value is determined from the correlation function. The value generally becomes more optimized as the detector approaches the leak. The leak is sought by iteratively changing the position of the detector until the value becomes substantially optimized or the leak is found.

摘要翻译： 一种用于在HFC网络中发现数字信号泄漏的手持式泄漏检测器，包括无线电接收器，泄漏接收器，泄漏采样器，相关器和显示器。 无线电接收机接收从HFC网络采集的数字信号样本，称为“参考样本”。泄漏接收器接收来自HFC网络的数字信号的漏泄信号。 泄漏采样器采样泄漏信号形成泄漏样本。 相关器执行参考样本和泄漏样本的互相关，以产生相关函数。 从相关函数确定可优化值。 当检测器接近泄漏时，该值通常会更加优化。 通过迭代地改变检测器的位置来寻求泄漏，直到该值变得基本上被优化或发现泄漏为止。

公开(公告)号：US20150077129A1

公开(公告)日：2015-03-19

申请号：US14552717

申请日：2014-11-25

申请人： ARCOM DIGITAL, LLC

发明人： Victor M. Zinevich

IPC分类号： G01R31/08

CPC分类号： G01R31/08 ,  G01S5/06 ,  H04H20/12 ,  H04N17/004 ,  H04N21/2383 ,  H04N21/4382 ,  H04N21/6118

摘要： A method of detecting a digital leakage signal originating from a leak in a coaxial cable portion of an HFC network. The network has a transmission end from which a digital signal is transmitted to the coaxial cable portion. The digital signal is emitted into free space from the leak to produce the leakage signal. The method comprises: (a) producing a first set of samples representing the digital signal; (b) transmitting the first set of samples to a leakage detector; (c) moving the leakage detector to a detection point in the vicinity of the network; (d) receiving the leakage signal from the leak; (e) sampling the leakage signal to produce a second set of samples; and (f) performing a cross-correlation of the first set of samples with the second set of samples, to produce a cross-correlation function having a peak, whereby the leakage signal is detected from the peak.

摘要翻译： 一种检测源自HFC网络同轴电缆部分泄漏的数字泄漏信号的方法。 网络具有发送端，数字信号从该发送端发送到同轴电缆部分。 数字信号从泄漏发射到自由空间中，产生泄漏信号。 该方法包括：（a）产生表示数字信号的第一组采样; （b）将第一组样本传送到泄漏检测器; （c）将泄漏检测器移动到网络附近的检测点; （d）接收泄漏的泄漏信号; （e）对泄漏信号进行采样以产生第二组样本; 和（f）执行第一组采样与第二组样本的互相关，以产生具有峰值的互相关函数，从而从峰值检测泄漏信号。

公开(公告)号：US07584496B2

公开(公告)日：2009-09-01

申请号：US11324641

申请日：2006-01-03

申请人： Victor M. Zinevitch

发明人： Victor M. Zinevitch

IPC分类号： H04N7/173 ,  H04N17/00

CPC分类号： H04N17/00

摘要： A system for pinpointing CDP sources in a two-way HFC CATV network comprises a headend CPD radar unit, a return path switch, and a computer. The radar unit is coupled to a headend combiner. The return path switch is coupled between the nodes of the CATV network and the radar unit. The computer is connected to the radar unit and the return path switch. The computer controls the radar unit and switch and causes them to perform constant sequential CPD monitoring of the nodes of the network. The system further comprises a portable radar-calibrator unit that is carried into the field and connected to various points along the coaxial cable portion of the network. The portable radar unit is used to detect CPD sources in the field and to calibrate the network as to time delay. The portable unit communicates with the headend radar unit through the CATV network.

摘要翻译： 用于在双向HFC CATV网络中精确定位CDP源的系统包括头端CPD雷达单元，返回路径开关和计算机。 雷达单元耦合到前端组合器。 返回路径开关耦合在CATV网络的节点和雷达单元之间。 计算机连接到雷达单元和返回路径开关。 计算机控制雷达单元并切换并使其对网络节点执行不间断的CPD监视。 该系统还包括便携式雷达校准器单元，其携带到现场并连接到沿着网络的同轴电缆部分的各个点。 便携式雷达单元用于检测现场的CPD源，并根据时间延迟校准网络。 便携式设备通过CATV网络与头端雷达单元进行通信。