公开(公告)号：US12143158B1

公开(公告)日：2024-11-12

申请号：US18205252

申请日：2023-06-02

Applicant: Acacia Communications, Inc.

Inventor： Antonio Caballero Jambrina ,  Miquel Mestre Adrover ,  Pierre Humblet

IPC: H04B17/00 ,  H04B17/16 ,  H04B17/373 ,  H04B17/391

Abstract: A method, system, and apparatus for emulating impairments in a communication system.

公开(公告)号：US12088355B2

公开(公告)日：2024-09-10

申请号：US18045354

申请日：2022-10-10

Applicant: NATIONAL INSTRUMENTS CORPORATION

Inventor： Jeremy Mielens ,  John Ammerman ,  Aljosa Vrancic ,  Andrew Lynch

IPC: H04B17/16 ,  H04B17/00 ,  H04B17/391

CPC classification number: H04B17/0087 ,  H04B17/0085 ,  H04B17/16 ,  H04B17/3912

Abstract: Systems and methods for emulating a channel for wireless communications between a transmit (TX) system-under-test (SUT) and a receive (RX) SUT. The TX and RX SUTs include integrated antenna arrays for transmitting and receiving wireless signals. For a plurality of paths of the emulated channel, and for each antenna element of the TX SUT, a respective phase shift and gain modification is applied to a wireless signals transmitted by the respective antenna element. The phase shifts and gain modifications emulate path length differences between different antenna elements. The signals for each antenna element are summed, and a path-specific modification is applied to each aggregate signal for each path. For each RX antenna element, phase shift and gain modifications are applied to emulate path-length differences for the RX antenna elements, the resultant signals are summed for each path, and the emulated wireless signals are output to the RX antenna elements.

公开(公告)号：US20240235708A1

公开(公告)日：2024-07-11

申请号：US18370334

申请日：2023-09-19

Applicant: Promptlink Communications, Inc.

Inventor： Foad TOWFIQ ,  Mohammad OSTADKAR ,  Adib TOWFIQ

IPC: H04H20/12 ,  G01R1/04 ,  G01R1/18 ,  H04B17/00 ,  H04B17/16 ,  H04H60/32 ,  H04L43/50

CPC classification number: H04H20/12 ,  H04B17/0085 ,  H04B17/16 ,  H04H60/32 ,  H04L43/50 ,  G01R1/04 ,  G01R1/18

Abstract: Various devices and techniques help to reduce the entry of unwanted radio waves into an enclosure and reduce the reflection of radio waves inside the enclosure. Such devices and techniques enable a test environment inside the enclosure that provides high-quality functionality and performance testing.

公开(公告)号：US11971439B2

公开(公告)日：2024-04-30

申请号：US17329902

申请日：2021-05-25

Applicant: DENSO CORPORATION

Inventor： Bunsei Murakami

IPC: G01R29/10 ,  H04B17/16 ,  H04B17/17

CPC classification number: G01R29/10 ,  H04B17/16 ,  H04B17/17

Abstract: A fault detection device executes a test signal supply process for changing a frequency of a carrier wave within a frequency range predetermined as a range of a resonance frequency of an antenna, modulating the carrier wave with a test signal as an input signal, amplifying the carrier wave that is modulated, and supplying the carrier wave that is amplified as an output target signal to the antenna. While executing the test signal supply process, the fault detection device measures an antenna current corresponding to the frequency each time the frequency of the carrier wave is changed The fault detection device detects a fault caused by a difference or a change in a characteristic of the antenna by using a value of the antenna current on a larger side among the antenna currents measured during the test signal supply process.

公开(公告)号：US20230333156A1

公开(公告)日：2023-10-19

申请号：US17659765

申请日：2022-04-19

Applicant: Dell Products L.P.

Inventor： John Bradley Deforge ,  Tommy Ivarsson ,  Sewvanda Don

IPC: G01R31/28 ,  H04B17/16 ,  H04B17/19 ,  G06F17/14

CPC classification number: G01R31/2822 ,  H04B17/16 ,  H04B17/19 ,  G06F17/14

Abstract: A system can comprise a radio unit comprising a digital front end chain. The system can further comprise a tap point disposed within the digital front end chain, wherein the tap point is configured to time align a signal at the tap point with a system time of the radio unit. The system can further comprise a first hardware component that is configured to selectively read the signal at the tap point to produce a read signal. The system can further comprise a second hardware component that is configured to store the read signal.

公开(公告)号：US20230046743A1

公开(公告)日：2023-02-16

申请号：US17881966

申请日：2022-08-05

Applicant: VIAVI SOLUTIONS INC.

Inventor： Reza VAEZ-GHAEMI ,  David FENSTERMACHER

IPC: H04B17/16 ,  H04B17/10 ,  H04B17/00 ,  H04B10/2575

Abstract: A test device tests conditions associated with a fronthaul in an Open Radio Access Network (O-RAN). The test device can field test an O-RAN radio unit (O-RU) installed at a cell site by emulating an O-RAN distributed unit (O-DU) in the O-RAN connected to the O-RU via the fronthaul of the O-RAN. The testing includes testing connectivity of the O-RU to the fronthaul. The testing includes executing managing plane (M-plane) and synchronization plane (S-plane) messaging to test management session establishment, device setting testing, and master clock synchronization testing. Additionally, optical insertion loss in the fronthaul and frequency and power of signals transmitted from the O-RU can be tested.

公开(公告)号：USRE49217E1

公开(公告)日：2022-09-20

申请号：US16796178

申请日：2020-07-10

Applicant: JD Design Enterprises LLC

Inventor： Andries Petrus Cronje Fourie ,  Derek Colin Nitch

IPC: H04B17/00 ,  H04B17/16 ,  G01R29/08 ,  H04B17/40 ,  H04W24/10 ,  H04W24/08 ,  H04W88/08 ,  G01R29/10 ,  H04B17/17

Abstract: A monitoring system 22 for a distributed antenna system (DAS) 10 is provided. The DAS comprises central transmitter 12 which is connected by a signal transmission network 14 to a plurality of distributed antenna devices (DAD) 16.1 to 16.n. The network comprises physical branches. Each of the DAD's is connected to a respective sub-branch 14.11 and comprises at least one antenna 18. The antenna is associated with a frequency band having a center frequency fc and an associated wavelength Ac. The monitoring system comprises a central monitoring unit (CMU) 24 which is coupled to the network 14. A monitoring device 28.1 is associated with at least one of the DAD's and permanently mounted a distance d

公开(公告)号：US20220239391A1

公开(公告)日：2022-07-28

申请号：US17603710

申请日：2020-04-20

Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Toshiro NAKAHIRA ,  Tomoki MURAKAMI ,  Hirantha ABEYSEKERA ,  Koichi ISHIHARA ,  Takafumi HAYASHI ,  Yasushi TAKATORI

IPC: H04B17/29 ,  H04B17/16 ,  H04W24/06

Abstract: An operation test method of a base station to which a plurality of terminal stations are connectable, the method including switching a specific radio communication unit of a plurality of radio communication units to a subordinate mode and setting another radio communication unit of the plurality of radio communication units to a normal mode, the normal mode being a mode in which each of the plurality of radio communication units performs radio communication as a base station, the subordinate mode being a mode in which each of the plurality of radio communication units performs radio communication as a virtual terminal station, each of the plurality of radio communication units being switchable between the normal mode and the subordinate mode, and conducting an operation test of the base station by performing, based on a test policy that sets the operation test, radio communication between the specific radio communication unit switched to the subordinate mode and the other radio communication unit in the normal mode.

公开(公告)号：US11388827B2

公开(公告)日：2022-07-12

申请号：US17092011

申请日：2020-11-06

Applicant: LITE-ON ELECTRONICS (GUANGZHOU) LIMITED ,  LITE-ON TECHNOLOGY CORPORATION

Inventor： Ming-Huei Lai ,  Che-Cheng Chang ,  Jian-Lun Chen

IPC: F16M11/00 ,  H05K5/06 ,  G01R29/10 ,  H04B17/11 ,  H04B17/27 ,  H01Q3/00 ,  H01Q1/12 ,  H04B17/16 ,  F16M13/00 ,  H05K5/02

Abstract: A fixing structure for an electronic device includes a mounting body and a mounting bracket. The mounting body includes a side surface, a bottom surface, and at least one limiting member disposed on the bottom surface. The limiting member includes a fixed end and a pillar. The pillar extends downward from the fixed end and protrudes from the bottom surface. The mounting bracket includes a fixing plate and a release assembly. The fixing plate is disposed under the bottom surface of the mounting body, and the fixing plate and the pillar are buckled with each other. The release assembly is disposed on the fixing plate, and the release assembly abuts against the side surface of the mounting body.

公开(公告)号：US11378621B2

公开(公告)日：2022-07-05

申请号：US16751771

申请日：2020-01-24

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Satoru Matsuyama ,  Satoshi Matsumura ,  Kazuhiro Nakamuta ,  Toshiki Matsumura

IPC: H03F3/20 ,  G01R31/3163 ,  H03M9/00 ,  H04B17/16 ,  H03F3/189

Abstract: A digital output monitor circuit includes a first digital circuit that performs mutual conversion between serial data and parallel data, a second digital circuit that decodes data output from the first digital circuit and generates a control signal for an analog circuit, and a third digital circuit that converts at least the control signal for an analog circuit into digital data. The first digital circuit converts the data output from the third digital circuit into serial data and outputs as an output data signal.