公开(公告)号：US20240361367A1

公开(公告)日：2024-10-31

申请号：US18143886

申请日：2023-05-05

Applicant: LitePoint Corporation

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

IPC: G01R23/18 ,  G01R27/30 ,  G01R29/26

CPC classification number: G01R23/18 ,  G01R27/30 ,  G01R29/26

Abstract: An example method includes 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 and intermodulation interference; (iv) obtaining a power spectral density value, where the power spectral density value comprises a power, at a frequency value, of a combined signal that is based on the attenuated device signal, the noise signal, and the intermodulation interference; (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：US10084555B1

公开(公告)日：2018-09-25

申请号：US15464607

申请日：2017-03-21

Applicant: LitePoint Corporation

Inventor： Christian Volf Olgaard ,  Ke Liu ,  Ruizu Wang

IPC: H04B17/29 ,  H04B17/318 ,  H04W24/08

Abstract: A method for estimating receiver sensitivity of a radio frequency (RF) data packet signal transceiver device under test that relies upon beacon request and response data packets for enabling communication links.

公开(公告)号：US09749066B2

公开(公告)日：2017-08-29

申请号：US14852814

申请日：2015-09-14

Applicant: LITEPOINT CORPORATION

Inventor： Christian Volf Olgaard ,  Ruizu Wang ,  Ke Liu ,  Fei Peng

IPC: H04B17/17 ,  H04B17/00

CPC classification number: H04B17/17 ,  H04B17/0085

Abstract: Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including communicating via each one of multiple available signal channels. Data packets exchanged between a tester and DUT as a normal part of a communication link initiation sequence are exchanged in such a manner that the tester transmits via all available channels simultaneously, thereby ensuring that a properly working DUT will always transmit in response. For example, in the case of a Bluetooth low energy transceiver, advertisement, scan request and scan response data packets can be used in such manner.

公开(公告)号：US20170078030A1

公开(公告)日：2017-03-16

申请号：US14852803

申请日：2015-09-14

Applicant: LITEPOINT CORPORATION

Inventor： Christian Volf OLGAARD ,  Ruizu Wang ,  Ke Liu ,  Fei Peng

IPC: H04B17/17 ,  H04W24/06

CPC classification number: H04B17/17 ,  H04B17/0085 ,  H04B17/14 ,  H04W24/06 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144

Abstract: Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) including communicating via at least one of multiple available signal channels. Data packets exchanged between a tester and DUT as a normal part of a communication link initiation sequence are selectively exchanged and suppressed to enable testing of the DUT without requiring inclusion of special drivers within the DUT, special test software within the tester or establishment of a synchronized communication link between the tester and DUT. For example, in the case of a Bluetooth low energy transceiver, advertisement, scan request and scan response data packets can be used in such manner.

Abstract translation: 用于测试包括通过多个可用信号信道中的至少一个进行通信的被测试射频（RF）数据分组信号收发器设备（DUT）的方法。 选择性地交换和抑制在测试仪和DUT之间交换的数据分组作为通信链路启动序列的正常部分，以便能够在DUT内测试DUT，而不需要在DUT内部包含特殊驱动器，测试器内的特殊测试软件或同步的建立 测试仪和DUT之间的通讯连接。 例如，在蓝牙低能量收发机的情况下，可以以这种方式使用广告，扫描请求和扫描响应数据分组。

公开(公告)号：US08842549B2

公开(公告)日：2014-09-23

申请号：US13716369

申请日：2012-12-17

Applicant: Litepoint Corporation

Inventor： Christian Volf Olgaard ,  Ruizu Wang ,  Erdem Serkan Erdogan ,  Mathew Philip

IPC: H04W24/00 ,  H04L12/26

CPC classification number: H04W24/00 ,  H04L1/1867 ,  H04L1/241 ,  H04L43/50 ,  H04W24/06

Abstract: System and method for facilitating testing of multiple data packet signal transceivers involving data-packet-signal replication and one or more status signals indicating successful and unsuccessful receptions of confirmation signals. Based upon the one or more status signals, one or more control signals cause the replicated data packet signals to be distributed to the devices under test (DUTs) such that, following successful and unsuccessful receptions of confirmation signals, corresponding replicated data packet signals are caused to fail to conform in part or to conform, respectively, with a predetermined data packet signal standard.

Abstract translation: 涉及涉及数据分组信号复制的多个数据分组信号收发机的测试的系统和方法以及表示确认信号的成功和不成功接收的一个或多个状态信号。 基于一个或多个状态信号，一个或多个控制信号使得复制的数据分组信号被分配到被测设备（DUT），使得在成功和不成功接收到确认信号之后，引起相应的复制数据分组信号 分别不符合预定的数据分组信号标准。

公开(公告)号：US11838776B2

公开(公告)日：2023-12-05

申请号：US17078625

申请日：2020-10-23

Applicant: LitePoint Corporation

Inventor： Christian Volf Olgaard ,  Ruizu Wang ,  Chen Cao

IPC: H04W24/08

CPC classification number: H04W24/08

Abstract: A system and method for using a wireless radio frequency (RF) data packet signaling link to enable non-link control of testing of a data packet signal transceiver device under test (DUT) in which a communication session between a tester and a DUT for purposes of testing the DUT may first be initiated by a separate, commonly available, and lower cost, communication device. Following its establishment, the tester may monitor the communication session, e.g., via wireless signal sniffing, to acquire and use associated device identification information to join the session and transmit trigger based test (TBT) data packets for initiating a test sequence within the DUT. Hence, use of a non-link capable tester to perform parametric testing of a DUT at the lowest network architecture layer, e.g., the physical (PHY) layer, may be enabled.

公开(公告)号：US11817913B1

公开(公告)日：2023-11-14

申请号：US17746230

申请日：2022-05-17

Applicant: LitePoint Corporation

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

IPC: H04B17/00

CPC classification number: H04B17/0085

Abstract: An example process determines a first error vector magnitude (EVM) of a signal output by a device under test (DUT). The process includes adding attenuation on a signal path between the DUT and a vector signal analyzer (VSA), where the attenuation is changeable: measuring, at the VSA, at least two second EVMs for different values of attenuation of the signal output by the DUT, where the at least two second EVMs are corrupted by noise from the VSA, and where each of the at least two second EVMs is based on two or more measurements; and determining the first EVM based on a linear relationship that is based on the first EVM, the at least two second EVMs, and a function based on the attenuation, where the first EVM is without at least some of the noise from the VSA.

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.

公开(公告)号：US20180278345A1

公开(公告)日：2018-09-27

申请号：US15464607

申请日：2017-03-21

Applicant: LitePoint Corporation

Inventor： Christian Volf Olgaard ,  Ke Liu ,  Ruizu Wang

IPC: H04B17/29 ,  H04W24/08 ,  H04B17/318

Abstract: A method for estimating receiver sensitivity of a radio frequency (RF) data packet signal transceiver device under test that relies upon beacon request and response data packets for enabling communication links.

公开(公告)号：US20160301588A1

公开(公告)日：2016-10-13

申请号：US14685120

申请日：2015-04-13

Applicant: Litepoint Corporation

Inventor： Christian Volf OLGAARD ,  Ruizu Wang

IPC: H04L12/26 ,  H04B17/15

CPC classification number: H04L43/0847 ,  H04B17/15 ,  H04L43/50

Abstract: System and method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) to enable use of measured packet error rate (PER) to determine transmit signal quality and thereby estimate error vector magnitude (EVM) of the DUT. By using a reference RF data packet signal transceiver having device characteristics and capabilities similar to the DUT including a low noise figure, in place of a formal test instrument with a significantly higher noise figure, significantly lower power DUT transmit signals can be tested, since the additional SNR is not required to determine transmit signal quality, thereby enabling reliable testing of transmit signal quality of the lower power signals from the DUTs. With a calibrated reference RF data packet signal receiver, a reduction in sensitivity as compared to the calibrated sensitivity indicates a reduced transmit signal quality of the received packet.

Abstract translation: 用于测试射频（RF）数据分组信号收发器设备（DUT）的系统和方法，以使得能够使用测量的分组差错率（PER）来确定发射信号质量，从而估计DUT的误差矢量幅度（EVM）。 通过使用具有与包括低噪声系数相似的DUT的器件特性和能力的参考RF数据分组信号收发器代替具有显着更高噪声系数的正式测试仪器，可以测试显着较低功率的DUT发射信号，因为 不需要额外的SNR来确定发射信号质量，从而能够可靠地测试来自DUT的较低功率信号的发射信号质量。 使用校准的参考RF数据分组信号接收机，与校准的灵敏度相比，灵敏度的降低表示接收分组的发送信号质量降低。