公开(公告)号：US11271651B2

公开(公告)日：2022-03-08

申请号：US17105304

申请日：2020-11-25

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hongqiang Bao ,  Ganghua Yang ,  Zhipeng Zhao ,  Huijian Zhang ,  Ramin Khayatzadeh

IPC: H04B10/2575 ,  H04B10/58 ,  H04W88/08 ,  H04B10/40

Abstract: A remote radio unit is for a base transceiver station. The remote radio unit includes: a noise generator configured to provide a RF noise signal having predefined statistical properties; a communication interface configured to transmit the RF noise signal as a stimulus signal over a radio-over-fiber uplink channel between the remote radio unit and a central unit of the base transceiver station for determining a pre-distortion of a target signal to be transmitted by the remote radio unit. The communication interface is further configured to receive the pre-distorted target signal over a ROF downlink channel between the remote radio unit and the central unit of the base transceiver station. The remote radio unit also has an antenna for transmitting the pre-distorted target signal received by the communication interface.

公开(公告)号：US11909441B2

公开(公告)日：2024-02-20

申请号：US17353461

申请日：2021-06-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Hongqiang Bao ,  Zhipeng Zhao ,  Ramin Khayatzadeh ,  Ganghua Yang

IPC: H04B10/2507 ,  H04B10/2575 ,  H04W88/08 ,  H04W72/21

CPC classification number: H04B10/2507 ,  H04B10/25753 ,  H04W72/21 ,  H04W88/08

Abstract: This application provides an example base station for an example wireless communication network and an example method. One example base station includes a central unit and a remote radio unit (RRU). The RRU includes one or more antennas. The RRU is coupled to the central unit via one or more optical transmission fibers. Each optical transmission fiber defines a respective downlink transmission channel for transmitting a respective downlink transmission signal from the central unit to the respective antenna of the RRU. The RRU is configured to provide a respective uplink feedback signal based on the respective downlink transmission signal via an uplink feedback channel to the central unit.

公开(公告)号：US11316614B2

公开(公告)日：2022-04-26

申请号：US16934180

申请日：2020-07-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huijian Zhang ,  Zhipeng Zhao ,  Wai Kong Raymond Leung ,  Marc Fossorier ,  Ingmar Land

IPC: H04L1/00 ,  H03M13/11 ,  H03M13/15 ,  H03M13/19 ,  H03M13/00

Abstract: The present disclosure provides a code generator for generating an {N′, K′} code for encoding and/or decoding data transmitted in a communication channel from an {N, K} code, wherein N and N′ are code lengths, K and K′ are code dimensions. The code generator is configured to shorten the {N, K} code to obtain an intermediate code, and to extend the intermediate code to obtain the {N′, K′} code. The present disclosure also provides a corresponding code construction method. Further, the present disclosure provides a device for encoding and/or decoding data transmitted in a communication channel, the device being configured to encode and/or decode the data based on an {N′, K′} code generated from the {N, K} code.

公开(公告)号：US11563493B2

公开(公告)日：2023-01-24

申请号：US17238912

申请日：2021-04-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ganghua Yang ,  Ramin Khayatzadeh ,  Zhipeng Zhao ,  Hongqiang Bao

IPC: H04B10/2575 ,  H04B10/50 ,  H04L5/00 ,  H04L5/14 ,  H04L27/20

Abstract: A MIMO system comprises a remote radio unit (RRU) and central unit. The RRU comprises: a binary phase shift keying (BPSK) modulator, configured to modulate a BPSK waveform by a local oscillator (LO) signal to generate a stimulus signal, wherein the LO signal is derived from a downlink optical signal received via downlink radio over fiber (DL-ROF) from a central unit (CU); and an optical signal generator, in particular a laser, configured to generate an uplink optical signal based on the stimulus signal for transmission via uplink radio over fiber (UL-ROF) to the CU.

公开(公告)号：US20210266070A1

公开(公告)日：2021-08-26

申请号：US17238912

申请日：2021-04-23

Applicant: Huawei Technologies Co, Ltd.

Inventor： Ganghua Yang ,  Ramin Khayatzadeh ,  Zhipeng Zhao ,  Hongqiang Bao

IPC: H04B10/2575 ,  H04L27/20 ,  H04L5/00 ,  H04L5/14 ,  H04B10/50

Abstract: A MIMO system comprises a remote radio unit (RRU) and central unit. The RRU comprises: a binary phase shift keying (BPSK) modulator, configured to modulate a BPSK waveform by a local oscillator (LO) signal to generate a stimulus signal, wherein the LO signal is derived from a downlink optical signal received via downlink radio over fiber (DL-ROF) from a central unit (CU); and an optical signal generator, in particular a laser, configured to generate an uplink optical signal based on the stimulus signal for transmission via uplink radio over fiber (UL-ROF) to the CU.