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：US20190222310A1

公开(公告)日：2019-07-18

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： H04B10/079 ,  H04B10/2575 ,  H04B10/2507

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：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：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：US20160197804A1

公开(公告)日：2016-07-07

申请号：US14936551

申请日：2015-11-09

申请人： ARCOM DIGITAL, LLC

发明人： Victor M. Zinevich

IPC分类号： H04L12/26 ,  H04L27/26

CPC分类号： H04L43/08 ,  H04B3/46 ,  H04L1/206 ,  H04L27/2601 ,  H04N17/004

摘要： Detecting a leak of an OFDM signal from an HFC network, where the HFC network extends over a network area. The OFDM signal includes a first continuous pilot subcarrier having a first harmonic. The first harmonic is defined by a pre-determined first frequency. The method or apparatus comprises the steps of or means for: (a) moving a leakage detector through the network area; (b) tuning the leakage detector to receive the first harmonic of the OFDM signal, based on the pre-determined first frequency of the first harmonic; (c) with the leakage detector, receiving over-the-air, at a received first frequency, the first harmonic of the OFDM signal leaked from the HFC network; and (d) with the leakage detector, detecting the first harmonic received in step (c), whereby the leak of the OFDM signal is detected based on the detection of the first harmonic.

摘要翻译： 检测来自HFC网络的OFDM信号的泄漏，其中HFC网络在网络区域上延伸。 OFDM信号包括具有第一谐波的第一连续导频子载波。 第一谐波由预定的第一频率定义。 该方法或装置包括以下步骤或装置：（a）通过网络区域移动泄漏检测器; （b）基于预定的第一谐波的第一频率调谐漏电检测器以接收OFDM信号的第一谐波; （c）利用泄漏检测器，以接收到的第一频率接收来自HFC网络的OFDM信号的一次谐波; 和（d）利用泄漏检测器检测在步骤（c）中接收到的一次谐波，由此基于一次谐波的检测来检测OFDM信号的泄漏。

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：US20220311660A1

公开(公告)日：2022-09-29

申请号：US17703059

申请日：2022-03-24

申请人： Arcom Digital, LLC

发明人： Victor Zinevich ,  Greg Tresness

IPC分类号： H04L41/0677 ,  H04L12/28 ,  H04L1/00 ,  H04L43/50 ,  H04B7/185

摘要： A time stamp method of location leakage in an aeronautical band of a high split HFC includes: scheduling at a cable modem termination system (CMTS), a generation of a plurality of OUDP bursts by at least one cable modem (CM) within a node in a fixed sequence; measuring a field leakage detector time stamp of a plurality of detected OUDP bursts relative to a half second GPS synch pulse, and sending a report to a leakage data server with a set of current GPS coordinates of a leakage detector, a time stamp, a detected leak level, and a measured OUDP time stamp; and calculating at the leakage data server, a CM ID based on the measured OUDP time stamp and a duration of an OUDP burst combined with a query to the CMTS and a CM database, to define a physical address of a CM corresponding to the CM ID.