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。

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.

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.

公开(公告)号：US20190190840A1

公开(公告)日：2019-06-20

申请号：US15842407

申请日：2017-12-14

Applicant: LitePoint Corporation

Inventor： Chen Cao ,  Christian Volf Olgaard ,  Ruizu Wang

IPC: H04L12/841 ,  H04L12/825 ,  H04L12/26

CPC classification number: H04L47/283 ,  H04L43/10 ,  H04L43/50 ,  H04L47/26

Abstract: A method for testing a data packet signal transceiver device under test (DUT). Following initial signal communications with a DUT, timing of further transmissions by the DUT may be effectively controlled by transmitting congestive communication channel signals to cause the DUT to detect apparent communication channel activity and in response thereto delay its own signal transmissions.

公开(公告)号：US10219248B2

公开(公告)日：2019-02-26

申请号：US15357013

申请日：2016-11-21

Applicant: LitePoint Corporation

Inventor： Ruizu Wang ,  Christian Volf Olgaard ,  Qinghui Luo

IPC: H04W72/02 ,  H04W4/80 ,  H04W24/10 ,  H04L29/12

Abstract: A method for communicating test results from a wireless device under test (DUT) using non-link testing resources. Test data resulting from testing one or more operations of the DUT are combined with other data to form one or more data packets for transmission to a tester. The test data occupies, e.g., via encoding, a portion of the one or more data packets designated for data identifying the DUT or a tester.

公开(公告)号：US20180359170A1

公开(公告)日：2018-12-13

申请号：US15619856

申请日：2017-06-12

Applicant: LitePoint Corporation

Inventor： Christian Volf Olgaard ,  Ruizu Wang ,  Qinghui Luo

IPC: H04L12/26 ,  G01R31/3183 ,  G01R31/319 ,  G01R31/317

CPC classification number: H04L43/50 ,  G01R31/31701 ,  G01R31/31725 ,  G01R31/318371 ,  G01R31/319 ,  G01R31/31926

Abstract: A method for coordinating testing of a wireless device under test (DUT) using non-link testing resources. Coordination between the tester and DUT is achieved by transmitting, from the tester to the DUT, predetermined numbers of data packets associated with predetermined tester identification data (e.g., MAC addresses identifying the tester transmitter). During test phases involving measurement and/or calibration of DUT transmit signals, the tester sends a number of data packets associated with one or more versions of tester identification data, in response to which the DUT performs internal operations (e.g., revising transmit power offsets). During later test phases involving validation of DUT performance, the tester sends another number of data packets associated with one or more versions of the tester identification data to inform the DUT that its testing has passed or failed, and/or is to be repeated.

公开(公告)号：US20180351664A1

公开(公告)日：2018-12-06

申请号：US15535135

申请日：2016-12-22

Applicant: LitePoint Corporation

Inventor： Christian Volf Olgaard ,  Ruizu Wang ,  Qing Jie Lu

IPC: H04B17/318

CPC classification number: H04B17/318 ,  H04B17/21

Abstract: A method for improving accuracy of power measurements of low power radio frequency (RF) signals received by a RF signal receiver in which power measurement accuracy taken at a low resolution is compensated with use of multiple RF signal attenuations at a finer resolution. In accordance with exemplary embodiments, incremental RF signal attenuations are applied to the received RF signal. An average of the power measurements, including those with the applied signal attenuations, has a net measurement error less than that of a direct power measurement.

公开(公告)号：US09003253B2

公开(公告)日：2015-04-07

申请号：US13972280

申请日：2013-08-21

Applicant: Litepoint Corporation

Inventor： Christian Volf Olgaard ,  Ruizu Wang ,  Guang Shi

IPC: G01R31/3183 ,  G01R31/319 ,  G01R31/317 ,  H04W24/06

CPC classification number: G01R31/319 ,  G01R31/31725 ,  G01R31/318371 ,  H04L43/50 ,  H04W24/06

Abstract: A method for testing a data packet signal transceiver device under test (DUT) that minimizes time lost due to waiting for respective power levels of data packets transmitted by the DUT to settle at the desired nominal value for transmit signal testing. In accordance with exemplary embodiments, signals transmitted by the DUT during receive signal testing, e.g., as acknowledgement data packets, are transmitted at the nominal value for transmit signal testing, thereby allowing sufficient time for individual data packet signal power levels to settle and remain consistent at the nominal value by the time receive signal testing is completed and transmit signal testing is to begin.

Abstract translation: 一种用于测试被测试的数据分组信号收发器设备（DUT）的方法，其最小化由于等待由DUT发送的数据分组的相应功率电平以达到期望的标称值以用于发射信号测试的时间损失。 根据示例性实施例，在接收信号测试期间由DUT发送的信号（例如作为确认数据分组）以用于发射信号测试的标称值被发送，从而允许足够的时间来使各个数据分组信号功率电平稳定并保持一致 在标准值下，接收信号测试完成，发射信号测试即将开始。

公开(公告)号：US11032725B1

公开(公告)日：2021-06-08

申请号：US16822523

申请日：2020-03-18

Applicant: LitePoint Corporation

Inventor： Christian Volf Olgaard ,  Ruizu Wang ,  Chen Cao

IPC: H04W24/04 ,  H04W24/06 ,  H04B17/29 ,  G01R31/302 ,  G01R31/319

Abstract: System and method for testing a wireless data packet signal transceiver device under test (DUT) in which external control circuitry manages initiation of execution by a tester of test program instructions defining multiple self-terminating test control sequences in one or more desired sequences. The test control sequences may be pre-stored in a tester for subsequent execution under control of control signals sourced externally by the external control circuitry via separate control signals.

公开(公告)号：US20200228434A1

公开(公告)日：2020-07-16

申请号：US16248453

申请日：2019-01-15

Applicant: LitePoint Corporation

Inventor： Christian Volf Olgaard ,  Ruizu Wang ,  Kaiyun Cui

IPC: H04L12/26 ,  H04B17/318

Abstract: System and method for testing transmission and reception performance of a data packet signal transceiver device under test (DUT). Data packet signals transmitted by a tester with a tester transmit output power (TTOP) contain trigger frames that include data corresponding to a reported tester transmit power (RTTP) of the data packet signals, and a desired received signal strength (TRSS) of DUT data packet signals to be received by the tester. Based on received signal strength of the tester data packet signals reported by the DUT (DRSS), responsive DUT data packet signals having a DUT transmit output power of RTTP-DRSS+TRSS. Successive repetitions of such tester and DUT data packet signals for multiple combinations of values of the TTOP, RTTP and DRSS enable testing transmission and reception performance of the DUT, including determining minimum and maximum DUT transmission power levels, with minimal signal interactions between tester and DUT.