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    Correcting error vector magnitude measurements
    11.
    发明授权
    Correcting error vector magnitude measurements 有权

    公开(公告)号：US11742970B1

    公开(公告)日：2023-08-29

    申请号：US17875782

    申请日：2022-07-28

    Applicant: LitePoint Corporation

    Inventor： Chen Cao ,  Christian Volf Olgaard ,  Ruizu Wang ,  Qingjie Lu

    IPC: H04B17/345 ,  H04B1/04 ,  H04L27/26

    CPC classification number: H04B17/345 ,  H04B1/0475 ,  H04L27/2614

    Abstract: An example test system includes memory (e.g., one or more memory devices) storing (i) instructions that are executable, and (ii) a mapping function that relates first error vector magnitudes (EVMs) for first symbols to second EVMs for the first symbols, where the first EVMs are corrupted by radio frequency (RF) noise and the second EVMs are corrupted by both RF noise and symbol decoding errors. The test system also includes a decoder to receive a signal from a device under test, and to obtain a third EVM for a second symbol that is based on the signal, where the third EVM is corrupted by both RF noise and a symbol decoding error. One or more processing devices are configured to execute the instructions to adjust the third EVM using the mapping function to correct the symbol decoding error in the third EVM.

    System and method for testing a radio frequency multiple-input multiple-output data packet transceiver while forcing fewer data streams
    16.
    发明授权
    System and method for testing a radio frequency multiple-input multiple-output data packet transceiver while forcing fewer data streams 有权
    用于测试射频多输入多输出数据包收发器的系统和方法，同时减少数据流

    公开(公告)号：US09077535B2

    公开(公告)日：2015-07-07

    申请号：US13894817

    申请日：2013-05-15

    Applicant: LITEPOINT CORPORATION

    Inventor： Christian Volf Olgaard

    IPC: H04L1/24 ,  H04B17/391 ,  H04B7/04

    CPC classification number: H04L1/24 ,  H04B7/0413 ,  H04B17/3911 ,  H04L1/06 ,  H04L1/241

    Abstract: In accordance with the presently claimed invention, a system and method are provided for testing multiple-input, multiple-output wireless radiofrequency (RF) packet data signal transceivers while operating in such ways as to communicate their signals using various combinations or permutations of packet data streams without requiring termination or re-establishment of communication links following transitions from one combination or permutation of packet data streams to another.

    Abstract translation: 根据目前要求保护的发明，提供了一种系统和方法，用于测试多输入多输出无线射频（RF）分组数据信号收发器，同时以使用分组数据的各种组合或排列来传送其信号的方式操作 流，而不需要在从一个组合或分组数据流的排列转换到另一个组合之后终止或重新建立通信链路。

    System and method for testing a data packet signal transceiver
    17.
    发明授权
    System and method for testing a data packet signal transceiver 有权
    用于测试数据包信号收发器的系统和方法

    公开(公告)号：US08780966B1

    公开(公告)日：2014-07-15

    申请号：US13841019

    申请日：2013-03-15

    Applicant: Litepoint Corporation

    Inventor： Christian Volf Olgaard ,  Ruizu Wang

    IPC: H04B17/00 ,  H04Q1/20

    CPC classification number: H04B17/14 ,  H04B17/0087 ,  H04B17/29 ,  H04L43/50

    Abstract: A method for testing data packet reception characteristics, such as sensitivity and throughput, of a data packet signal transceiver. By monitoring responsive data packet signals returning from a device under test (DUT), it can be determined whether and when the DUT has successfully received valid data packets, received faulty data packets, received valid data packets in a faulty manner, or not received valid data packets. When any of such events are detected, the stimulus data packet signals can be provided in such a manner as to determine whether possible DUT reception problems are related to power level, duration or data rate of the stimulus data packet signals, or to circuitry within DUT without requiring external controls over or querying of the DUT.

    Abstract translation: 一种用于测试数据分组信号收发器的数据分组接收特性（诸如灵敏度和吞吐量）的方法。 通过监视从被测器件（DUT）返回的响应数据分组信号，可以确定DUT是否以及何时成功接收到有效数据分组，接收到的故障数据分组，故障接收的有效数据分组或未被接收的有效数据分组 数据包。 当检测到任何这种事件时，可以以确定可能的DUT接收问题是否与激励数据分组信号的功率电平，持续时间或数据速率或DUT内的电路相关的方式来提供刺激数据分组信号 而无需对DUT进行外部控制或查询。

    DETERMINING A DELAY IN SIGNAL TRANSMISSION ALONG A WIRED TRANSMISSON MEDIUM
    18.
    发明申请
    DETERMINING A DELAY IN SIGNAL TRANSMISSION ALONG A WIRED TRANSMISSON MEDIUM 有权

    公开(公告)号：US20240430185A1

    公开(公告)日：2024-12-26

    申请号：US18216799

    申请日：2023-06-30

    Applicant: LitePoint Corporation

    Inventor： Chen CAO ,  Christian Volf Olgaard ,  Ruizu Wang ,  Qingjie Lu

    IPC: H04L43/0852

    Abstract: An example system includes a signal generator to output signals based on multiple carrier frequencies; a wired transmission medium for carrying the signals, where the wired transmission medium is configured as open ended to produce reflections on the wired transmission medium of the signals; and a signal analyzer to receive the reflections and to determine a transmission time of a signal along the wired transmission medium based on the reflections. The signal analyzer is configured to perform operations that include performing a search based on an estimated transmission time of the signal along the wired transmission medium and the reflections to determine the transmission time. The search is to determine which of multiple candidate transmission times to select for the transmission time.

    REMOVING TEST EQUIPMENT NOISE FROM POWER SPECTRAL DENSITY MEASUREMENTS
    19.
    发明公开
    REMOVING TEST EQUIPMENT NOISE FROM POWER SPECTRAL DENSITY MEASUREMENTS 审中-公开

    公开(公告)号：US20240361376A1

    公开(公告)日：2024-10-31

    申请号：US18144019

    申请日：2023-05-05

    Applicant: LitePoint Corporation

    Inventor： Chen Cao ,  Christian Volf Olgaard ,  Ruizu Wang ,  Qingjie Lu

    IPC: G01R31/28 ,  G01R23/18

    CPC classification number: G01R31/2837 ,  G01R23/18 ,  G01R31/2841

    Abstract: An example method includes the following operations: (i) receiving a device signal from a device under test (DUT); (ii) setting an attenuation value; (iii) applying the attenuation value to the device signal to produce an attenuated device signal for a frequency spectrum analyzing device, where the frequency spectrum analyzing device produces a noise signal; (iv) obtaining a power spectral density value using the frequency spectrum analyzing device, where a power spectral density comprises a power, at a frequency value, of a combined signal that is based on the attenuated device signal and the noise signal; (v) repeating operations (ii), (iii), and (iv) one or more times to produce multiple power spectral density values; (vi) repeating operations (i), (ii), (iii), (iv), and (v) one or more times to add power spectral density values to the multiple power spectral density values; and (vii) obtaining a power spectral density of the device signal.

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