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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.
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Patent Agency Ranking
公开(公告)号：US11658748B2
公开(公告)日：2023-05-23
申请号：US17974301
申请日：2022-10-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Djalal Falih Bendimerad , Hartmut Hafermann , Huijian Zhang
IPC: H04B10/532 , H04B10/516 , H04B10/556 , H04L1/00 , H04B10/2557 , H04B10/564
CPC classification number: H04B10/532 , H04B10/2557 , H04B10/5161 , H04B10/5561 , H04L1/0042 , H04B10/564
Abstract: An optical transmitter transmits a data signal. The optical transmitter has an encoder configured to encode the data signal by selecting based on a bit sequence a first symbol and a second symbol from a set of four symbols for each one of at least two transmission time slots. The optical transmitter further has a modulator configured to use in each transmission time slot the first symbol to modulate a first carrier wave and the second symbol to modulate a second carrier wave, and to transmit the two carrier waves over orthogonal polarizations of an optical carrier. Symbols in consecutive transmission time slots have non-identical polarization states.
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公开(公告)号：US11496221B2
公开(公告)日：2022-11-08
申请号：US17402268
申请日：2021-08-13
Applicant: Huawei Technologies Co., Ltd.
Inventor： Djalal Falih Bendimerad , Hartmut Hafermann , Huijian Zhang
IPC: H04B10/532 , H04B10/516 , H04B10/556 , H04L1/00 , H04B10/2557 , H04B10/564
Abstract: An optical transmitter, having an encoder and modulator, transmits a data signal. The encoder maps information bits of the data signal to a symbol in eight-dimensional (8D) constellation space spanned by vectors IXT1, QXT1, IYT1, QYT1, IXT2, QXT2, IYT2, QYT2, wherein I and Q are in-phase and quadrature components of an optical carrier, X and Y are orthogonal polarizations of the optical carrier, and T1 and T2 are two consecutive transmission time slots, by selecting the symbol from a set of constellation points in the 8D space. The modulator uses the symbol in the two consecutive transmission time slots to modulate two carrier waves, and to transmit the two carrier waves over the orthogonal polarizations of the optical carrier. The set of constellation points do not include any constellation point with parallel Stokes vectors in the two consecutive transmission time slots but comprise constellation points with orthogonal Stokes vectors.
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公开(公告)号：US11095371B2
公开(公告)日：2021-08-17
申请号：US16810620
申请日：2020-03-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Djalal Falih Bendimerad , Hartmut Hafermann , Huijian Zhang
IPC: H04B10/532 , H04B10/516 , H04B10/556 , H04L1/00 , H04B10/2557 , H04B10/564
Abstract: An optical transmitter transmits a data signal. The optical transmitter includes an encoder configured to encode the data signal by selecting based on a bit sequence, a first symbol and a second symbol from a set of four symbols for each one of at least two transmission time slots. The optical transmitter further includes a modulator configured to use in each transmission time slot the first symbol to modulate a first carrier wave and the second symbol to modulate a second carrier wave, and to transmit the two carrier waves over orthogonal polarizations of an optical carrier. Symbols in consecutive transmission time slots have non-identical polarization states.
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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
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.
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公开(公告)号：US20230065511A1
公开(公告)日：2023-03-02
申请号：US17974301
申请日：2022-10-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Djalal Falih BENDIMERAD , Hartmut HAFERMANN , Huijian Zhang
IPC: H04B10/532 , H04B10/516 , H04B10/556 , H04L1/00 , H04B10/2557
Abstract: An optical transmitter transmits a data signal. The optical transmitter has an encoder configured to encode the data signal by selecting based on a bit sequence a first symbol and a second symbol from a set of four symbols for each one of at least two transmission time slots. The optical transmitter further has a modulator configured to use in each transmission time slot the first symbol to modulate a first carrier wave and the second symbol to modulate a second carrier wave, and to transmit the two carrier waves over orthogonal polarizations of an optical carrier. Symbols in consecutive transmission time slots have non-identical polarization states.
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