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公开(公告)号：US08605775B2
公开(公告)日：2013-12-10
申请号：US13465951
申请日：2012-05-07
申请人： Gregory W. Massey
发明人： Gregory W. Massey
CPC分类号： H04B17/309 , H04B17/21
摘要： The invention relates to a method for measuring Hum on a digital QAM carrier using a testing device for testing digital TV signals including a QAM demodulator therein, and to a testing device implementing the method. A controller is used to sample a register associated with a final AGC stage in a QAM demodulator, and to process the collected register values to obtain one or more Hum characteristics. In one embodiment, a circular buffer is used to collect aligned sequences of AGC samples that have a pre-determined feature of time-domain Hum at a specified position therein. The aligned AGC sequences are then correlated to assess causes of Hum.
摘要翻译： 本发明涉及一种使用测试装置测量数字QAM载波的方法，该测试装置用于测试其中包括QAM解调器的数字电视信号，以及实施该方法的测试装置。 控制器用于对与QAM解调器中的最终AGC级相关联的寄存器进行采样，并处理收集的寄存器值以获得一个或多个Hum特性。 在一个实施例中，循环缓冲器用于收集具有在其中的指定位置处具有时域Hum的预定特征的AGC样本的对准序列。 然后将对准的AGC序列相关联以评估Hum的原因。
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公开(公告)号：US20130034141A1
公开(公告)日：2013-02-07
申请号：US13566378
申请日：2012-08-03
申请人： Gregory W. MASSEY
发明人： Gregory W. MASSEY
IPC分类号： H04B17/00
CPC分类号： H04L27/38 , H04B17/21 , H04B17/336 , H04L2025/0342
摘要： A diagnostic data acquisition system for analyzing impairments in a QAM digital communication system is triggered by diagnostic data generated by a QAM demodulator when demodulating a QAM signal. Upon triggering, the data acquisition system can capture the diagnostic data used for triggering, and/or some other diagnostic data. The captured data may be stored for subsequent analysis to determine a probable cause of the impairment.
摘要翻译： 用于分析QAM数字通信系统中的损伤的诊断数据采集系统由解调QAM信号时由QAM解调器产生的诊断数据触发。 触发后，数据采集系统可捕获用于触发的诊断数据和/或其他一些诊断数据。 捕获的数据可以被存储用于随后的分析以确定可能的损伤原因。
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3.发明申请公开(公告)号：US20090245117A1
公开(公告)日：2009-10-01
申请号：US12414930
申请日：2009-03-31
IPC分类号： H04L12/26
CPC分类号： H04N17/004
摘要： A method and apparatus are provided for detecting network impairments through tilt-normalized measurement data, the method including: collecting data for a network signal; computing a best-fit tilt for the collected data; performing tilt-normalization of the collected data responsive to the computed best-fit tilt; and determining whether the tilt-normalized data crosses a threshold, and if so, pattern matching the tilt-normalized data to detect a network impairment; and the apparatus including: an input unit for collecting data from a network signal; a tilt unit connected to the input unit for computing a best-fit tilt for the collected data and performing tilt-normalization of the collected data responsive to the computed best-fit tilt; and a pattern matching unit connected to the tilt unit for determining whether the tilt-normalized data crosses a threshold, and if so, pattern matching the tilt-normalized data to detect at least one network impairment.
摘要翻译： 提供一种通过倾斜归一化测量数据检测网络损伤的方法和装置，该方法包括：收集网络信号的数据; 为收集的数据计算最佳拟合倾斜度; 响应于所计算的最佳拟合倾斜，执行收集的数据的倾斜归一化; 以及确定所述倾斜归一化数据是否跨越阈值，如果是，则匹配所述倾斜归一化数据以检测网络损伤; 所述装置包括：用于从网络信号收集数据的输入单元; 连接到所述输入单元的倾斜单元，用于针对所收集的数据计算最佳拟合倾斜，并且响应于所计算的最佳拟合倾斜执行所收集的数据的倾斜归一化; 以及连接到所述倾斜单元的模式匹配单元，用于确定所述倾斜归一化数据是否跨越阈值，如果是，则匹配所述倾斜归一化数据以检测至少一个网络损伤。
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公开(公告)号：US20090086028A1
公开(公告)日：2009-04-02
申请号：US12241365
申请日：2008-09-30
申请人： Walter MILLER , Pingnan SHI , Reena RAMNAME , Gregory W. MASSEY
发明人： Walter MILLER , Pingnan SHI , Reena RAMNAME , Gregory W. MASSEY
IPC分类号： H04N17/00
CPC分类号： H04N7/10 , H04N17/004
摘要： A method and apparatus are provided for testing susceptibility of a receiver to intermodulation distortion of a digital channel, the method including selecting a first digital channel from channels in a composite signal, determining a first power measurement from the first digital channel, determining a total power measurement from other channels in the composite signal, and determining susceptibility of the first digital channel to intermodulation distortion by comparing the first power measurement and the total power measurement with intermodulation distortion characteristics of the receiver.
摘要翻译： 提供了一种用于测试接收机对数字信道的互调失真的敏感度的方法和装置，所述方法包括从复合信号中的信道中选择第一数字信道，从第一数字信道确定第一功率测量，确定总功率 通过将所述第一功率测量与所述总功率测量与所述接收机的互调失真特性进行比较来确定所述第一数字信道对互调失真的敏感性。
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公开(公告)号：US20120213259A1
公开(公告)日：2012-08-23
申请号：US13399797
申请日：2012-02-17
申请人： Thomas RENKEN , Gregory W. MASSEY
发明人： Thomas RENKEN , Gregory W. MASSEY
IPC分类号： H04B17/00
CPC分类号： H04N17/00 , H04N7/17309 , H04N21/42676 , H04N21/44209 , H04N21/44245 , H04N21/6118 , H04N21/6168 , H04N21/6543
摘要： The invention relates to measurement-capable cable modems for cable networks. Idle receivers and transmitters of a cable modem are used to perform upstream and downstream measurements on DOCSIS and non-DOCSIS digital and analog TV channels without disrupting customer services. A currently idle receiver is tuned to a target downstream channel under directions of a modem measurement controller, and is queried by the measurement controller to perform a measurement as specified by a measurement plan. A currently idle transmitter is tuned to a target upstream channel to transmit a test signal that is received by an upstream measurement system. Measurements are communicated to a central measurement controller, for example located at the headend, which collects measurements from a plurality of cable modems and the upstream measurement system. The resulting monitoring system performs cable network wide monitoring using existing cable modems without requiring additional monitoring devices.
摘要翻译： 本发明涉及用于电缆网络的测量电缆调制解调器。 电缆调制解调器的空闲接收机和发射机用于对DOCSIS和非DOCSIS数字和模拟电视频道进行上行和下行测量，而不会中断客户服务。 当前空闲的接收机在调制解调器测量控制器的方向上被调谐到目标下游信道，并且被测量控制器查询以执行由测量计划指定的测量。 当前空闲的发射机被调谐到目标上行信道以发射由上游测量系统接收的测试信号。 测量被传送到中央测量控制器，例如位于头端，其从多个电缆调制解调器和上游测量系统收集测量值。 所产生的监控系统使用现有的电缆调制解调器进行有线网络监控，而无需额外的监控设备。
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公开(公告)号：US08762088B2
公开(公告)日：2014-06-24
申请号：US13361763
申请日：2012-01-30
摘要： Systems and methods for quantifying the suitability of a coax network segment to support MoCA communications, comprising: transmitting a test signal associated with MoCA communications through the segment's first end; receiving the test signal through the segment's second end; determining a response function; determining a channel degradation reference based on the highest power level of the response function and a predetermined reference; calculating subcarrier degradation for each MoCA subcarrier, in accordance with the difference between the channel degradation reference and the subcarrier response function; and quantifying the suitability of the segment to support MoCA communications from the first end to the second end in accordance with the subcarrier degradation of all subcarriers in the response function.
摘要翻译： 用于量化同轴电缆网段以支持MoCA通信的适用性的系统和方法包括：通过该段的第一端发送与MoCA通信相关的测试信号; 通过该段的第二端接收测试信号; 确定响应函数; 基于所述响应函数的最高功率电平和预定参考来确定信道劣化参考; 根据信道劣化参考与子载波响应函数之间的差异，计算每个MoCA副载波的副载波劣化; 并且根据响应函数中的所有子载波的子载波劣化，量化该段的适用性以支持从第一端到第二端的MoCA通信。
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公开(公告)号：US08649421B2
公开(公告)日：2014-02-11
申请号：US13399797
申请日：2012-02-17
申请人： Thomas Renken , Gregory W. Massey
发明人： Thomas Renken , Gregory W. Massey
CPC分类号： H04N17/00 , H04N7/17309 , H04N21/42676 , H04N21/44209 , H04N21/44245 , H04N21/6118 , H04N21/6168 , H04N21/6543
摘要： The invention relates to measurement-capable cable modems for cable networks. Idle receivers and transmitters of a cable modem are used to perform upstream and downstream measurements on DOCSIS and non-DOCSIS digital and analog TV channels without disrupting customer services. A currently idle receiver is tuned to a target downstream channel under directions of a modem measurement controller, and is queried by the measurement controller to perform a measurement as specified by a measurement plan. A currently idle transmitter is tuned to a target upstream channel to transmit a test signal that is received by an upstream measurement system. Measurements are communicated to a central measurement controller, for example located at the headend, which collects measurements from a plurality of cable modems and the upstream measurement system. The resulting monitoring system performs cable network wide monitoring using existing cable modems without requiring additional monitoring devices.
摘要翻译： 本发明涉及用于电缆网络的测量电缆调制解调器。 电缆调制解调器的空闲接收机和发射机用于对DOCSIS和非DOCSIS数字和模拟电视频道进行上行和下行测量，而不会中断客户服务。 当前空闲的接收机在调制解调器测量控制器的方向上被调谐到目标下游信道，并且被测量控制器查询以执行由测量计划指定的测量。 当前空闲的发射机被调谐到目标上行信道以发射由上游测量系统接收的测试信号。 测量被传送到中央测量控制器，例如位于头端，其从多个电缆调制解调器和上游测量系统收集测量值。 所产生的监控系统使用现有的电缆调制解调器进行有线网络监控，而无需额外的监控设备。
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公开(公告)号：US08311086B2
公开(公告)日：2012-11-13
申请号：US12241365
申请日：2008-09-30
申请人： Walter Miller , Pingnan Shi , Reena Ramname , Gregory W. Massey
发明人： Walter Miller , Pingnan Shi , Reena Ramname , Gregory W. Massey
IPC分类号： H04B3/46
CPC分类号： H04N7/10 , H04N17/004
摘要： A method and apparatus are provided for testing susceptibility of a receiver to intermodulation distortion of a digital channel, the method including selecting a first digital channel from channels in a composite signal, determining a first power measurement from the first digital channel, determining a total power measurement from other channels in the composite signal, and determining susceptibility of the first digital channel to intermodulation distortion by comparing the first power measurement and the total power measurement with intermodulation distortion characteristics of the receiver.
摘要翻译： 提供了一种用于测试接收机对数字信道的互调失真的敏感度的方法和装置，所述方法包括从复合信号中的信道中选择第一数字信道，从第一数字信道确定第一功率测量，确定总功率 通过将所述第一功率测量与所述总功率测量与所述接收机的互调失真特性进行比较来确定所述第一数字信道对互调失真的敏感性。
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公开(公告)号：US08189651B2
公开(公告)日：2012-05-29
申请号：US12413086
申请日：2009-03-27
CPC分类号： H04B17/309 , H04B17/21
摘要： The invention relates to a method for measuring Hum on a digital QAM carrier using a testing device for testing digital TV signals including a QAM demodulator therein, and to a testing device implementing the method. A micro-controller is used to sample a register associated with an AGC circuit in the QAM demodulator, and to process the collected register values to obtain one or more Hum characteristics.
摘要翻译： 本发明涉及一种使用测试装置测量数字QAM载波的方法，该测试装置用于测试其中包括QAM解调器的数字电视信号，以及实施该方法的测试装置。 微控制器用于对与QAM解调器中的AGC电路相关联的寄存器进行采样，并处理收集的寄存器值以获得一个或多个Hum特性。
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公开(公告)号：US20080089402A1
公开(公告)日：2008-04-17
申请号：US11856921
申请日：2007-09-18
CPC分类号： H04B17/309 , H04B17/21
摘要： The present invention relates to a system for calculating a digital quality index (DQI), which provides a rating on a predetermined scale, indicative of the impairments in a received quadrature amplitude modulated (QAM) signal in a CATV cable system. The DQI system utilizes bit error rates prior to and after forward error correction to calculate the DQI value. To increase the calculation rate, the bit error rates can be estimated using voltage errors, signal to noise ratios and/or average corner error metrics.
摘要翻译： 本发明涉及一种用于计算数字质量指数（DQI）的系统，该数字质量指数（DQI）提供指示CATV电缆系统中接收的正交幅度调制（QAM）信号中的损伤的预定比例的额定值。 DQI系统在前向纠错前后利用误码率来计算DQI值。 为了增加计算速率，可以使用电压误差，信噪比和/或平均角误差度量来估计误码率。
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