公开(公告)号：US20240223428A1

公开(公告)日：2024-07-04

申请号：US18604700

申请日：2024-03-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jun CHEN ,  Mao Yan ,  Yiling Wu ,  Sunjie Wang ,  Yujian Tang ,  Lang Wang

IPC: H04L27/26 ,  H04L27/36

CPC classification number: H04L27/26362 ,  H04L27/2605 ,  H04L27/36

Abstract: This application provides a signal transmission method and an apparatus, to reduce an envelope ripple of a transmission signal. The method includes: A base station obtains a first bit sequence and maps the first bit sequence to a first modulation symbol sequence, where a value of each modulation symbol in the first modulation symbol sequence belongs to a first constellation point set, the first constellation point set includes K modulation symbols, and each of the K modulation symbols has a different amplitude. The base station sequentially performs a DFT, weighting, and an IFFT on each modulation symbol in the first modulation symbol sequence to obtain a first signal. Based on the foregoing solution, an envelope ripple of the signal generated by the base station in time domain is small. This facilitates demodulation of the transmission signal by a terminal.

公开(公告)号：US11328135B2

公开(公告)日：2022-05-10

申请号：US17030915

申请日：2020-09-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huaizhi Zhang ,  Sunjie Wang ,  Bo Han ,  Lang Wang ,  Mei Jian ,  Junfeng Gao

IPC: G06K7/00 ,  G06K7/10

Abstract: This application discloses example radio frequency identification systems and example methods for constructing a relay network, a reader, and a repeater. One example radio frequency identification system includes a reader, a repeater, and a target tag. The reader can be configured to send a first signal to the repeater. The repeater can be configured to send an excitation signal to the target tag based on the first signal. The target tag can be configured to send a target backscatter signal based on excitation of the excitation signal, where the target backscatter signal carries electronic product code information. The reader can be further configured to receive the target backscatter signal and obtain the electronic product code information in the target backscatter signal.

公开(公告)号：US11095034B2

公开(公告)日：2021-08-17

申请号：US16730767

申请日：2019-12-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huaizhi Zhang ,  Sunjie Wang ,  Daniele Inserra ,  Guangjun Wen

IPC: H01Q1/38 ,  H01Q9/04

Abstract: The antenna in the embodiments provided includes: a first-layer antenna, a second-layer antenna, a first probe, a second probe, a first connector, and a second connector. An annular microstrip patch is attached to each of main bodies of the first-layer antenna and the second-layer antenna. The annular microstrip patch attached to the first-layer antenna is provided with a first feeding network and a second feeding network therein. The first-layer antenna is connected to the first probe and the second probe by using the first feeding network and the second feeding network respectively. The first-layer antenna is connected to the first connector and the second connector. A position of the first connector corresponds to a position where the first probe is connected to the first-layer antenna. A position of the second connector corresponds to a position where the second probe is connected to the first-layer antenna.

公开(公告)号：US10547353B2

公开(公告)日：2020-01-28

申请号：US15839009

申请日：2017-12-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Jianjun Yang ,  Ke Sun ,  Sunjie Wang ,  Bo Wang

IPC: H04W88/08 ,  H04B7/022 ,  H04W16/20 ,  H04B7/0491

Abstract: The present disclosure discloses a distributed antenna system. The DAS includes a signal source, a first signal generator, a first passive mixer, and a first antenna. The first signal generator is configured to: generate a first local-frequency signal, and send it to the first passive mixer by using a passive DAS line. The first passive mixer is configured to receive the first local-frequency signal, and a downlink radio frequency signal having a second radio frequency band. The first passive mixer is further configured to: perform frequency mixing processing on the received downlink radio frequency signal having the second radio frequency band by using the first local-frequency signal, to form a first downlink radio frequency signal having a first radio frequency band, and then send it to the first antenna. The first antenna is configured to transmit the received first downlink radio frequency signal having the first radio frequency band.