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公开(公告)号：US20210325437A1
公开(公告)日：2021-10-21
申请号：US16852535
申请日：2020-04-19
发明人： Thomas H. Jones
摘要： A spectrum analyzing device and method include sweeping a first frequency range at least once at a first resolution and performing a Fast Fourier Transform (FFT) on data from the sweeping of the first frequency range to produce first peak hold trace data. A second frequency range is swept at least once at a second resolution and an FFT applied to produce second peak hold trace data based on the sweeping of the second frequency range. The resolution for the sweeps is selected based on a bandwidth of the frequency range to be swept. A composite graphical display is produced based upon the first and second peak hold trace data. By caching the peak hold trace data, the spectrum analyzer preserves detected signal information when zooming from a coarser to a finer frequency resolution while minimizing the processing requirements of the spectrum analysis.
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公开(公告)号：US20190162764A1
公开(公告)日：2019-05-30
申请号：US16245045
申请日：2019-01-10
IPC分类号： G01R23/16 , G01R31/319 , G01R31/302 , G01R13/02
摘要： A graphical display for displaying spectrum analyzer data that represents detected signal levels for frequencies in an identified frequency span includes a signal level axis that represents a range of detected RF signal levels for the spectrum analyzer data and a frequency axis that represents an identified frequency spectrum span for the spectrum analyzer data. Frequency ranges in the identified frequency span having a high concentration of detected RF energy are automatically graphically expanded and displayed on the frequency axis of the graphical display while frequency ranges having a lower concentration of detected RF energy are simultaneously, automatically graphically condensed and displayed on the first frequency axis of the graphical display.
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公开(公告)号：US20220078124A1
公开(公告)日：2022-03-10
申请号：US17187879
申请日：2021-02-28
发明人： Thomas H. Jones , Ross Alan Binkley
IPC分类号： H04L12/851 , G08G5/00
摘要： A system and method for detecting unmanned aerial vehicles (UAV) includes capturing a set of wireless data traffic from a wireless transmission and performing frequency spectrum analysis on datagram arrival times to classify the wireless data traffic based upon potential constant-datagram-rate data content that may be indicative that at least a portion of the wireless data traffic is emanating from a UAV. The wireless data traffic may be captured from one or more Wi-Fi receivers and sorted based upon transmission parameters prior to performing the frequency spectrum analysis. Detected peak frequencies may be used to determine if any constant-datagram-rate traffic within the wireless data traffic potentially contains data traffic streaming from a UAV. Directional antennas and/or a phased array of antennas can be used to determine the direction of propagation of the wireless transmission and further classify the wireless data traffic based on potential emanation from a UAV.
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公开(公告)号：US20190199604A1
公开(公告)日：2019-06-27
申请号：US16290905
申请日：2019-03-02
CPC分类号： H04L43/04 , H04L43/16 , H04L63/1425 , H04W12/1201
摘要： A system and method of classifying a set of internet protocol network data traffic based upon potential constant-datagram-rate data content such as VoIP traffic or streaming video using frequency spectrum analysis of datagram arrival times is disclosed. The network data traffic is captured with an apparatus connected in-line on the network link from which the set of network data traffic is obtained or wirelessly from a wireless network transmission. The network data traffic is presorted based upon parameters such as the media access control-layer, datagram size, IP address, port number or transport-layer protocol to limit the required analysis. A threshold function is used to detect peaks in the calculated frequency spectrum that indicate constant-datagram-rate traffic. An automated system preferably captures the network data traffic, immediately performs the frequency spectrum analysis on the captured data traffic, and stores the analysis results in memory for later access.
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公开(公告)号：US07630853B2
公开(公告)日：2009-12-08
申请号：US11782636
申请日：2007-07-25
IPC分类号： G01R27/28
CPC分类号： G01R31/021 , H04M1/24 , H04M1/68 , H04Q3/0087 , H04Q2213/1316 , H04Q2213/13166 , H04Q2213/1319
摘要： Line anomalies on a line under test are detected by generating a test signal at a first power level and coupling the test signal to the line under test. A response level is received from the line under test at a second and third harmonic frequency of the first test signal. A second test signal is generated at an increased power level and coupled to the line under test and a response level from the line is received at a second and third harmonic frequency of the second test signal. The process is repeated by raising the power level of the test signal until a current level supplied to the line by a test signal exceeds an acceptable threshold level. The response levels are compared to stored data to locate any line anomalies present. The stored data represents harmonic response data obtained from the same line at a previous time. A graphical or mathematical representation of the response data is produced such that the response data can be easily compared to locate any anomalies.
摘要翻译： 通过在第一功率电平上产生测试信号并将测试信号耦合到被测线路来检测被测线上的线路异常。 在第一测试信号的第二和第三谐波频率处从被测线路接收到响应电平。 第二测试信号以增加的功率电平产生并耦合到被测线路，并且在第二测试信号的第二和第三谐波频率处接收来自线路的响应电平。 通过提高测试信号的功率电平来重复该过程，直到由测试信号提供给线路的电流水平超过可接受的阈值水平。 将响应级别与存储的数据进行比较以定位存在的任何线路异常。 存储的数据表示从先前的同一行得到的谐波响应数据。 产生响应数据的图形或数学表示，使得可以容易地比较响应数据以定位任何异常。
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公开(公告)号：US10705127B2
公开(公告)日：2020-07-07
申请号：US16245045
申请日：2019-01-10
IPC分类号： G01R23/16 , G01R13/02 , G01R31/302 , G01R31/319 , G01R23/163
摘要： A graphical display for displaying spectrum analyzer data that represents detected signal levels for frequencies in an identified frequency span includes a signal level axis that represents a range of detected RF signal levels for the spectrum analyzer data and a frequency axis that represents an identified frequency spectrum span for the spectrum analyzer data. Frequency ranges in the identified frequency span having a high concentration of detected RF energy are automatically graphically expanded and displayed on the frequency axis of the graphical display while frequency ranges having a lower concentration of detected RF energy are simultaneously, automatically graphically condensed and displayed on the first frequency axis of the graphical display.
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7.发明授权公开(公告)号：US07058530B1
公开(公告)日：2006-06-06
申请号：US10917971
申请日：2004-08-13
IPC分类号： G06F7/02
CPC分类号： G01S7/021
摘要： An improved method and system for detecting covert surveillance devices uses frequency spectrum traces produced by a spectrum analyzer. The electromagnetic spectrum is scanned in a reference area to produce a reference frequency spectrum trace. The electromagnetic spectrum is then continuously scanned in a nearby target area to produce a peak hold frequency spectrum trace. The reference frequency spectrum trace is then subtracted from the peak hold spectrum trace to produce a comparative frequency spectrum trace. Peaks in the comparative frequency spectrum correspond to signals that are unique to either the reference area or the target area or transitory in nature. Statistical analysis is performed on subsequently obtained frequency traces to identify any changes in the frequency traces.
摘要翻译： 用于检测隐蔽监视装置的改进方法和系统使用由频谱分析仪产生的频谱图。 在参考区域中扫描电磁谱，以产生参考频谱轨迹。 然后在附近的目标区域连续地扫描电磁光谱，以产生峰值保持频谱轨迹。 然后从峰值保持频谱轨迹中减去参考频谱轨迹，以产生比较频谱轨迹。 比较频谱中的峰对应于参考区域或目标区域或临时性质特有的信号。 对随后获得的频率轨迹执行统计分析，以识别频率迹线中的任何变化。
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公开(公告)号：US10938682B2
公开(公告)日：2021-03-02
申请号：US16290905
申请日：2019-03-02
摘要： A system and method of classifying a set of internet protocol network data traffic based upon potential constant-datagram-rate data content such as VoIP traffic or streaming video using frequency spectrum analysis of datagram arrival times is disclosed. The network data traffic is captured with an apparatus connected in-line on the network link from which the set of network data traffic is obtained or wirelessly from a wireless network transmission. The network data traffic is presorted based upon parameters such as the media access control-layer, datagram size, IP address, port number or transport-layer protocol to limit the required analysis. A threshold function is used to detect peaks in the calculated frequency spectrum that indicate constant-datagram-rate traffic. An automated system preferably captures the network data traffic, immediately performs the frequency spectrum analysis on the captured data traffic, and stores the analysis results in memory for later access.
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公开(公告)号：US11539632B2
公开(公告)日：2022-12-27
申请号：US17187879
申请日：2021-02-28
发明人： Thomas H. Jones , Ross Alan Binkley
IPC分类号： H04L47/2441 , G08G5/00 , H04W84/12
摘要： A system and method for detecting unmanned aerial vehicles (UAV) includes capturing a set of wireless data traffic from a wireless transmission and performing frequency spectrum analysis on datagram arrival times to classify the wireless data traffic based upon potential constant-datagram-rate data content that may be indicative that at least a portion of the wireless data traffic is emanating from a UAV. The wireless data traffic may be captured from one or more Wi-Fi receivers and sorted based upon transmission parameters prior to performing the frequency spectrum analysis. Detected peak frequencies may be used to determine if any constant-datagram-rate traffic within the wireless data traffic potentially contains data traffic streaming from a UAV. Directional antennas and/or a phased array of antennas can be used to determine the direction of propagation of the wireless transmission and further classify the wireless data traffic based on potential emanation from a UAV.
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公开(公告)号：US10230821B2
公开(公告)日：2019-03-12
申请号：US14984188
申请日：2015-12-30
摘要： A system and method of classifying a set of internet protocol network data traffic as likely or unlikely to contain constant-packet-rate data or VoIP traffic using frequency spectrum analysis of data packet arrival times. The method is performed with an apparatus connected in-line on the network link from which the set of network data traffic is obtained. The network data traffic is presorted by packet size, source IP address, destination IP address, source port number, destination port number, or transport-layer protocol to limit the required analysis. A sliding window function is used to provide the time-domain input data to the frequency spectrum analysis. A threshold function is used to detect peaks in the calculated frequency spectrum that indicate constant-packet-rate traffic. An automated system preferably captures the network data traffic from one or more network links, immediately performs the frequency spectrum analysis on the data traffic and stores the results in memory for later access.
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