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1.发明公开公开(公告)号：US20240361367A1
公开(公告)日：2024-10-31
申请号：US18143886
申请日：2023-05-05
发明人： Chen CAO , Christian Volf Olgaard , Ruizu Wang , Qingjie Lu
摘要： 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.
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2.发明授权公开(公告)号：US10666538B2
公开(公告)日：2020-05-26
申请号：US14721598
申请日：2015-05-26
摘要： Method for testing a radio frequency (RF) data packet signal transceiver device under test (DUT) via a wireless signal medium that enables final functional testing of a fully assembled DUT without requiring wired signal connections. System performance characteristics indicative of manufacturing assembly defects, such as defective antennas or subsystem connections, can be performed using over the air (OTA) test signals communicated wirelessly between the DUT and a tester. By using actual DUT performance characteristics determined during earlier manufacturing tests, such as receiver sensitivity and transmitter power, and known power levels available from the tester transmitter, the OTA signal path loss (i.e., attenuation of the wireless signal) can be estimated and used to confirm the final state of system operation.
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公开(公告)号：US20200021369A1
公开(公告)日：2020-01-16
申请号：US16036432
申请日：2018-07-16
摘要： Systems and methods for detecting faulty elements in an active planar antenna array of an extremely high frequency (EHF) wireless communication device. A planar antenna array having a matrix of dual-polarization modulated scattering probes is disposed within a near-field region of the antenna under test (AUT). Electromagnetic energy received from the AUT is converted to a complex electrical signal that is modulated by an electrical modulation signal and radiated as a scattering signal. The resulting electromagnetic scattering signal, received and converted to an electrical signal by another antenna, is used in a holographic image reconstruction operation via a backward-propagation transformation to reconstruct the signal spectrum radiated from the surface of the AUT. A comparison of this reconstructed signal spectrum with a reference signal spectrum radiated from the surface of a known good antenna array enables detection of faulty antenna elements within the AUT.
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公开(公告)号：US10084555B1
公开(公告)日：2018-09-25
申请号：US15464607
申请日：2017-03-21
发明人： Christian Volf Olgaard , Ke Liu , Ruizu Wang
IPC分类号： H04B17/29 , H04B17/318 , H04W24/08
摘要： 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.
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公开(公告)号：US09749066B2
公开(公告)日：2017-08-29
申请号：US14852814
申请日：2015-09-14
发明人： Christian Volf Olgaard , Ruizu Wang , Ke Liu , Fei Peng
CPC分类号： H04B17/17 , H04B17/0085
摘要： 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.
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6.发明授权Method of facilitating testing of multiple time-division-duplex (TDD) data packet signal transceivers 有权方便多个时分双工（TDD）数据分组信号收发机的测试公开(公告)号：US08842552B2
公开(公告)日：2014-09-23
申请号：US13716573
申请日：2012-12-17
发明人： Christian Volf Olgaard , Wing Hung Lee , Guang Shi , Sang Yui Hon
CPC分类号： H04W24/02 , H04L1/1671 , H04L1/1812 , H04L1/244 , H04L2001/0093 , H04W24/06 , H04W74/006
摘要： Method and system for facilitating testing of multiple time-division-duplex (TDD) data packet signal transceivers. Replicas of a data packet signal are transmitted by a tester to multiple TDD devices under test (DUTs), where the replicated signal is either a null or TDD data packet signal. In one embodiment, replica null data packet signals are transmitted for a predetermined time interval sufficient for the DUTs to synchronize with the tester. In another embodiment, following successful and unsuccessful receptions of responsive signals from respective DUTs indicating successful reception of their respective replica TDD data packet signals and, therefore, synchronization with the tester, corresponding replica TDD data packet signals are provided with data packet signal characteristics causing such replica data packet signals to fail to conform or to conform, respectively, with a predetermined data packet signal standard. Following synchronization, test and responsive data packet signals can be exchanged between the tester and DUTs.
摘要翻译： 用于促进多时分双工（TDD）数据分组信号收发器测试的方法和系统。 数据分组信号的复制品由测试者发送到被测试的多个TDD设备（DUT），其中复制信号是空值或TDD数据分组信号。 在一个实施例中，复制空数据分组信号被发送预定时间间隔，足以使DUT与测试器同步。 在另一个实施例中，在成功地和不成功地接收来自相应DUT的响应信号之后，指示成功地接收到它们各自的副本TDD数据分组信号，并因此与测试者同步，相应的复制TDD数据分组信号被提供有导致这样的数据分组信号特征 复制数据分组信号分别不符合或符合预定的数据分组信号标准。 在同步之后，可以在测试仪和DUT之间交换测试和响应数据包信号。
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7.发明授权System and method for parallel testing of multiple data packet signal transceivers 有权用于并行测试多个数据包信号收发器的系统和方法公开(公告)号：US08842549B2
公开(公告)日：2014-09-23
申请号：US13716369
申请日：2012-12-17
CPC分类号： H04W24/00 , H04L1/1867 , H04L1/241 , H04L43/50 , H04W24/06
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US11838776B2
公开(公告)日：2023-12-05
申请号：US17078625
申请日：2020-10-23
发明人： Christian Volf Olgaard , Ruizu Wang , Chen Cao
IPC分类号： H04W24/08
CPC分类号： H04W24/08
摘要： 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.
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公开(公告)号：US11835563B2
公开(公告)日：2023-12-05
申请号：US17672400
申请日：2022-02-15
CPC分类号： G01R29/0878 , G01R29/10 , H04B17/102
摘要： Systems and methods are provided for systems and methods for using pulsed radio frequency (RF) signals to stimulate one or more modulated scattering probes (MSPs) to enable measurements of distance to and planarity of a surface of a wireless device under test (DUT).
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公开(公告)号：US11817913B1
公开(公告)日：2023-11-14
申请号：US17746230
申请日：2022-05-17
发明人： Chen Cao , Christian Volf Olgaard , Ruizu Wang , Qingjie Lu
IPC分类号： H04B17/00
CPC分类号： H04B17/0085
摘要： 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.
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