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.