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21. 发明申请

US20210152250A1 NETWORK COMMUNICATIONS SYSTEMS AND METHODS 有权
公开(公告)号：US20210152250A1
公开(公告)日：2021-05-20
申请号：US17135661
申请日：2020-12-28
申请人： CABLE TELEVISION LABORATORIES, INC.
发明人： LUIS ALBERTO CAMPOS
IPC分类号： H04B10/50 , H04B10/63 , H04B10/532 , H04B10/64 , H04J14/06 , H04J14/04
摘要： Methods, systems, and devices for network communications to reduce optical beat interference (OBI) in upstream communications are described. For example, a fiber node may provide a narrow band seed source to injection lock upstream laser diodes. Therefore, upstream communications from each injection locked laser diode may primarily include the wavelength associated with each seed source. The seed sources may be unique to each end device and configured to minimize OBI. That is, the upstream laser diodes may be generic, but the received seed source may enable upstream communications at varying wavelengths. The fiber node may provide each seed source by filtering (e.g., by a grating filter) a broadband light source.

22. 发明申请

US20210111802A1 HUB-LEAF LASER SYNCHRONIZATION 有权
公开(公告)号：US20210111802A1
公开(公告)日：2021-04-15
申请号：US16871083
申请日：2020-05-11
申请人： Infinera Corporation
发明人： John D. McNicol , Han Henry Sun , Kuang-Tsan Wu
IPC分类号： H04B10/50 , H04B10/532
摘要： Consistent with the present disclosure a network is provided that includes a primary node and a plurality of secondary nodes. The primary node, as well as each of the secondary nodes, includes a laser that is “shared” between the transmit and receive sections. That is, light output from the laser is used for transmission as well as for coherent detection. In the coherent receiver, the frequency of the primary node laser is detected and, based on such detected frequency, the frequency of the secondary node laser is adjusted to detect the received information or data. Such frequency detection also serves to adjust the transmitted signal frequency, because the laser is shared between the transmit and receive portions in each secondary receiver. Light output from the primary node laser, which is also shared between transmit and receive portions in the primary node, is thus also set to a frequency that permits detection of each of the incoming optical signals by way of coherent detection. Since, in this example, only one laser is employed in the primary node, the primary node may have a simpler design and may be less expensive to manufacture compared to a primary node having multiple local oscillator lasers, each associated with a corresponding uplink optical signal.

23. 发明申请

US20210105071A1 Radio Access Network using Radio Over Fibre 有权
公开(公告)号：US20210105071A1
公开(公告)日：2021-04-08
申请号：US16932975
申请日：2020-07-20
申请人： Fadhel M. Ghannouchi
发明人： Fadhel M. Ghannouchi , Mahmood R. Noweir , Mohamed Helaoui
IPC分类号： H04B10/2575 , H04B10/112 , H04B10/532 , H04B10/50 , H04B10/61
摘要： A radio communication system comprising an optical carrier generator for generating at least a pair of frequency spaced optical carrier signals, a transceiver configured to modulate a first portion of the pair of spaced optical carrier signals with downlink (DL) information to generate a modulated first optical signal, combine an unmodulated second optical signal formed of a remaining unmodulated second portion of the pair of spaced optical carrier signals with the modulated first optical signal to form a combined optical signal for transmission over an optical link, receive an optical uplink (UL) signal from said optical link, said optical UL signal comprising UL information modulated on said unmodulated second portion of the spaced optical carrier signals and down convert said received optical UL signal using a photodetector to output an electrical signal at a baseband frequency.

24. 发明授权

US10938500B2 Methods and apparatus for dual polarisation optical communication 有权
公开(公告)号：US10938500B2
公开(公告)日：2021-03-02
申请号：US16465177
申请日：2016-12-12
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： Fabio Cavaliere , Gianluca Meloni , Francesco Fresi , Vito Sorianello
IPC分类号： H04J14/06 , H04B10/532 , H04B10/67
摘要： A method for dual polarisation optical transmission is disclosed. The method comprises splitting a continuous wave light source into first and second sub-channels, optically modulating each sub-channel with a data signal, and superimposing a first pilot tone onto the first optically modulated sub-channel and a second pilot tone, different from the first pilot tone, onto the second optically modulated sub-channel. The method further comprises polarisation multiplexing the first and second sub-channels to form a polarisation multiplexed signal, in which the first and second sub-channels have orthogonal states of polarisation, and transmitting the polarisation multiplexed signal.

25. 发明申请

US20200244394A1 APPARATUS AND METHOD FOR COMMUNICATING DATA OVER AN OPTICAL CHANNEL 审中-公开
公开(公告)号：US20200244394A1
公开(公告)日：2020-07-30
申请号：US16853514
申请日：2020-04-20
申请人： INPHI CORPORATION
发明人： Benjamin P. SMITH , Arash FARHOODFAR
IPC分类号： H04L1/00 , H04B10/50 , H04B10/516 , H04B10/54 , H03M13/29 , H04B10/532 , H04B10/69
摘要： An optical module processes first FEC (Forward Error Correction) encoded data produced by a first FEC encoder. The optical module has a second FEC encoder for further coding a subset of the first FEC encoded data to produce second FEC encoded data. The optical module also has an optical modulator for modulating, based on a combination of the second FEC encoded data and a remaining portion of the first FEC encoded data that is not further coded, an optical signal for transmission over an optical channel. The second FEC encoder is an encoder for an FEC code that has a bit-level trellis representation with a number of states in any section of the bit-level trellis representation being less than or equal to 64 states. In this manner, the second FEC encoder has relatively low complexity (e.g. relatively low transistor count) that can reduce power consumption for the optical module.

26. 发明申请

US20200244362A1 SYSTEM FOR MILLIMETER WAVE BUILDING PENETRATION USING BEAM FORMING AND BEAM STEERING 审中-公开
公开(公告)号：US20200244362A1
公开(公告)日：2020-07-30
申请号：US16808990
申请日：2020-03-04
申请人： NxGen Partners IP, LLC
发明人： Solyman ASHRAFI
IPC分类号： H04B10/2575 , H04B10/50 , H04L27/36 , H04L25/03 , H04L27/34 , H04B10/11 , H04L9/08 , H04L9/30 , H04L29/06 , H04B10/2581 , H04B10/532 , H04B10/54 , H04J14/00 , H04B10/516
摘要： A system for enabling signal penetration into a building includes first circuitry, located on an exterior of the building, for transmitting and receiving signals at a first frequency that experience losses when penetrating into an interior of the building, converting the received signals at the first frequency into a first format that overcome losses caused by penetrating into the interior of the building over a wireless communications link and converting received signals in the first format into the signals in the first frequency. The first circuitry receives the signals at the first frequency that are transmitted to the first circuitry using beam forming and beam steering. A first antenna associated with the first circuitry transmits the signals in the first format into the interior of the building via a wireless communications link and receives signals from the interior of the building in the first format via the wireless communications link. Second circuitry, located on the interior of the building and communicatively linked with the first circuitry via the wireless communications link, receives and transmits the converted received signals in the first format that counteracts the losses caused by penetrating into the interior of the building from/to the first circuitry. A second antenna associated with the second circuitry transmits the signals in the first format to the exterior of the building via the wireless communications link and receives signals from the exterior of the building in the first format via the wireless communications link.

27. 发明授权

US10659192B2 Apparatus and method for communicating data over an optical channel 有权
公开(公告)号：US10659192B2
公开(公告)日：2020-05-19
申请号：US16451986
申请日：2019-06-25
申请人： INPHI CORPORATION
发明人： Benjamin P. Smith , Arash Farhoodfar
IPC分类号： H04L1/00 , H04B10/50 , H04B10/516 , H04B10/54 , H03M13/29 , H04B10/532 , H04B10/69
摘要： An optical module processes first FEC (Forward Error Correction) encoded data produced by a first FEC encoder. The optical module has a second FEC encoder for further coding a subset of the first FEC encoded data to produce second FEC encoded data. The optical module also has an optical modulator for modulating, based on a combination of the second FEC encoded data and a remaining portion of the first FEC encoded data that is not further coded, an optical signal for transmission over an optical channel. The second FEC encoder is an encoder for an FEC code that has a bit-level trellis representation with a number of states in any section of the bit-level trellis representation being less than or equal to 64 states. In this manner, the second FEC encoder has relatively low complexity (e.g. relatively low transistor count) that can reduce power consumption for the optical module.

28. 发明申请

US20200067601A1 QUANTUM COMMUNICATION SYSTEM, TRANSMITTING APPARATUS, AND RECEIVING APPARATUS 审中-公开
公开(公告)号：US20200067601A1
公开(公告)日：2020-02-27
申请号：US16354309
申请日：2019-03-15
申请人： KABUSHIKI KAISHA TOSHIBA , Toshiba Infrastructure Systems & Solutions Corporation
发明人： Masakazu KIKAWADA , Masatoshi HIRONO
IPC分类号： H04B10/524 , H04B10/70 , H04B10/532
摘要： According to one embodiment, a quantum communication system includes a transmitting apparatus and a receiving apparatus. The transmitting apparatus includes a plurality of light sources configured to generate a plurality of optical pulses having different wavelengths, an encoder including a single first modulator configured to modulate the optical pulses to encode information, and a transmitting part configured to transmit an optical pulse train including the modulated optical pulses to the receiving apparatus. The receiving apparatus includes a receiving part configured to receive the optical pulse train from the transmitting apparatus, and a decoder configured to obtain information based on the received optical pulse train.

29. 发明申请

US20200007235A1 SYSTEM AND METHOD FOR COMMUNICATION USING ORBITAL ANGULAR MOMENTUM WITH MULTIPLE LAYER OVERLAY MODULATION 审中-公开
公开(公告)号：US20200007235A1
公开(公告)日：2020-01-02
申请号：US16566369
申请日：2019-09-10
申请人： NXGEN PARTNERS IP, LLC
发明人： SOLYMAN ASHRAFI , ROGER LINQUIST , NIMA ASHRAFI
IPC分类号： H04B10/2575 , H04B10/532 , H04B10/54 , H04J14/00 , H04L25/03 , H04L27/36 , H04B10/2581 , H04L27/34 , H04B10/11 , H04B10/50 , H04L9/08 , H04L9/30 , H04L29/06 , H04B10/516 , H04J14/06
摘要： A system includes mode division multiplexing (MDM) processing circuitry for applying an orbital angular momentum (OAM) to each of a first group of a plurality of input signals and multiplexing the OAM processed signals together. Second processing circuitry performs wavelength distribution multiplexing (WDM) on a second group of the plurality of input signals, wherein the WDM processed signals and the MDM processed signals are orthogonal to one another. Combining circuitry combines the WDM processed signals and the MDM processed signals. Polarization processing circuitry adds polarization to at least one of the WDM processed signals, and the MDM processed signals and a transmitter transmits the combine and polarized processed signal over a link.

30. 发明授权

US10523362B2 Systems and methods for error-free reconstruction of transmitted symbols in a coherent receiver 有权
公开(公告)号：US10523362B2
公开(公告)日：2019-12-31
申请号：US15845045
申请日：2017-12-18
申请人： Ciena Corporation
发明人： Michael Andrew Reimer , Qunbi Zhuge , Manoj Verghese , Hamid Ebrahimzad , Maurice O'Sullivan
IPC分类号： H04L1/00 , H04B10/2513 , H04B10/532 , H04L27/34 , H04B10/2543 , H04L1/24 , H04J14/02 , H04B10/588
摘要： Systems and methods for estimating a transmit symbol sequence implemented in a coherent receiver include receiving a nominally error-free information bit sequence subsequent to Forward Error Correction (FEC) decoding; determining a nominally error-free estimate of the transmitted bit sequence based on the nominally error-free information bit sequence; and determining a nominally error-free estimate of the transmit symbol sequence by mapping the transmit bit sequence to transmit symbols. The system and methods can further include comparing a transmit optical field based on the transmit symbols to a received optical field for one or more measurements.

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