公开(公告)号：US20240171291A1

公开(公告)日：2024-05-23

申请号：US18374053

申请日：2023-09-28

Applicant: Keysight Technologies, Inc.

Inventor： Huaizhi Yang ,  Ya Jing ,  Jin-Ming Zhao ,  Zi Quan Bai

IPC: H04B17/00 ,  H04B17/15 ,  H04B17/309

CPC classification number: H04B17/0085 ,  H04B17/191 ,  H04B17/309

Abstract: A system, device and method for optimization of a radiated transmission matrix by the selecting probe antennae and applying a compensation network in the test system are described. Among other benefits, the anechoic chamber in which the DUT is disposed is comparatively small and inexpensive. The time-consuming process of inverse matrix tuning or isolation level checking that plagues known systems, device and methods of testing DUT is substantially avoided. Because of small size of shield box and probe antenna selection algorithm, low path loss and acceptable power in testing can be realized.

公开(公告)号：US20250168667A1

公开(公告)日：2025-05-22

申请号：US18924809

申请日：2024-10-23

Applicant: Keysight Technologies, Inc.

Inventor： Huaizhi Yang ,  Bao-Feng Jia ,  Yun-Feng Zhang ,  Jin-Ming Zhao

IPC: H04W24/06 ,  H04W84/12

Abstract: A system and method are provided for modeling a wireless communication environment between UE and an AP within a test space. The method includes receiving a data transmissions at the UE from the AP; determining that at least a portion of the data transmissions is associated with NR-U data; importing and filtering an NR-U UE log to provide filtered NR-U data; generating a power profile for the wireless communication environment using sampled power level measurements from the filtered NR-U data in the NR-U UE log; creating a digital twin map of the test space based on practical geometric configurations of the test space; generating a Doppler profile for the UE using the digital twin map; generating a power delay profile (PDP) profile for the UE using the digital twin map; and building an emulation model for the UE based on the power profile, the Doppler profile and the PDP profile.

公开(公告)号：US20230324445A1

公开(公告)日：2023-10-12

申请号：US18116538

申请日：2023-03-02

Applicant: Keysight Technologies, Inc.

Inventor： Huaizhi Yang ,  Jukka Antero Kyrolainen ,  Lassi Hentila ,  Jin-Ming Zhao

IPC: G01R29/08

CPC classification number: G01R29/0871 ,  G01R29/0892

Abstract: A method for modeling an NR DUT using a MIMO OTA test system including a BTS configured to send and receive RF test signals to and from the DUT, and probes configured to reproduce a three-dimensional fading environment for the DUT placed in a quiet zone of an anechoic chamber in response to the RF test signals. The method includes building CIR files for fading channels provided by a channel emulator in the MIMO OTA test system; selecting preferred CIR files from the CIR files having corresponding channel power levels higher than a threshold corresponding to a minimum power level; and performing bi-directional fading emulation with the fading channels using the preferred CIR files, where remaining CIR files are disregarded. The probes reproduce the three-dimensional fading environment for the DUT in the quiet zone using the RF test signals adjusted by the bi-directional fading emulation with the fading channels.