专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US11558115B1 System and method for interference cancellation in optical transmission 有权
公开(公告)号：US11558115B1
公开(公告)日：2023-01-17
申请号：US17375831
申请日：2021-07-14
申请人： Huawei Technologies Co., Ltd.
发明人： Jeebak Mitra , Mrinmoy Jana , Lutz Hans-Joachim Lampe , Jin Wang , Chuandong Li
IPC分类号： H04B10/2543 , H04B10/58 , H04J14/02
摘要： Methods and systems for low complexity interference cancellation in multichannel optical transmission. Local or self-iteration is performed one or more times between an expected propagation decision feedback equalizer and a soft demapper. Following local iteration, a soft decision forward error correction decoder determines bit log-likelihood ratios, which are fed back to the expected propagation decision feedback equalizer and soft demapper for further self-iteration. Global iteration involving the decoder can also be performed one or more times before a bitstream is decoded.

2. 发明授权

US11438064B2 Optimal equalization partitioning 有权
公开(公告)号：US11438064B2
公开(公告)日：2022-09-06
申请号：US17144428
申请日：2021-01-08
申请人： MACOM Technology Solutions Holdings, Inc.
发明人： Ryan Latchman
IPC分类号： H04B10/2543 , H04B10/2507 , H04B10/077
摘要： A communication interface comprising a host with non-linear equalizers configured to perform non-linear equalization. Also part of the interface is a host to optic module channel electrically connecting the host to an optic module and the optic module. The optic module comprises a transmitter and a receiver. The transmitter includes a linear equalizer and an electrical to optical module configured to convert the equalized signal from the driver to an optical signal, and transmit the optical signal over a fiber optic cable, such that the transmitter does not perform non-linear processing. The receiver includes a photodetector, configured to convert the received optic signal to a received electrical signal, and a linear amplifier configured to perform linear amplification on the received electrical signal. A driver sends the amplified received signal over an optic module to host channel, such that the receive does not perform non-linear processing.

3. 发明授权

US11095395B2 Increase in reach of unrepeatered fiber transmission 有权
公开(公告)号：US11095395B2
公开(公告)日：2021-08-17
申请号：US16657776
申请日：2019-10-18
申请人： Nikola Alic , Vanessa Lynn Karr
发明人： Nikola Alic , Vanessa Lynn Karr
IPC分类号： H04B10/2513 , H04B10/2543 , H04J14/02 , H04L1/00 , H04B10/50 , H04B10/291
摘要： The present invention is directed to techniques and systems for extension of unrepeatered submarine fiber links to provide an increase in reach of unrepeatered fiber transmission. Both single channel unrepeatered systems and multiple channel unrepeatered systems can be used. The multiple channel unrepeatered systems can further employ nonlinearity compensation. The present invention is also directed to methods of signal transmission using the unrepeatered systems.

4. 发明申请

US20210184768A1 Interference Suppression with Mitigation of Intermodulation Distortion 有权
公开(公告)号：US20210184768A1
公开(公告)日：2021-06-17
申请号：US17187860
申请日：2021-02-28
申请人： Photonic Systems, Inc.
发明人： Edward I. Ackerman
IPC分类号： H04B10/2507 , H04B10/2575 , H04B10/50 , H04B10/2543
摘要： A method of interference suppression with intermodulation distortion mitigation includes processing an RF signal comprising an RF signal of interest and an RF interfering signal to produce a first and second RF drive signal each with a desired RF interference signal power and having a 90 degree relative phase. The first RF drive signal is imposed onto a first optical signal with a modulator to generate a first modulated optical signal so that the modulator has a large-signal behavior that is characterized by a Bessel function of the first kind J1(ϕ), wherein the desired power at a frequency of the interference signal of the first drive signal is chosen to correspond to a zero of the Bessel function of the first kind J1(ϕ). The second RF drive signal is imposed onto a second optical signal with a modulator to generate a second modulated optical signal so that the modulator has a large-signal behavior that is characterized by a Bessel function of the first kind J1(ϕ), wherein the desired power at a frequency of the interference signal of the second drive signal is chosen to correspond to another zero of the Bessel function of the first kind J1(ϕ). The first and second modulated optical signal are combined with an optical power ratio that is selected to suppress third-order intermodulation distortion products in an electrical signal generated by detecting the optically combined first and second modulated optical signals.

5. 发明授权

US10659161B2 System and method for the transmission of optical signals 有权
公开(公告)号：US10659161B2
公开(公告)日：2020-05-19
申请号：US16140152
申请日：2018-09-24
申请人： ASTON UNIVERSITY
发明人： Filipe Ferreira , Naoise Mac-Suibhne , Andrew Ellis , Stylianos Sygletos , Mariia Sorokina , Christian Sanchez Costa
IPC分类号： H04B10/2543 , H04B10/29 , H04B10/50 , H04B10/61 , H04J14/00
摘要： A system for transmission of an optical signal, the system including an optical coupler for splitting said signal into a first copy and a second copy. The optical coupler has an input for receiving the optical signal, a first output for the first copy and a second output for the second copy. The system also includes a first optical guide connected to the first output, a second optical guide connected to the second output and a superposition module for coherently superimposing the first copy and the second copy of the signal.

6. 发明申请

US20200036468A1 Adjustment of Control Parameters of Section of Optical Fiber Network 审中-公开
公开(公告)号：US20200036468A1
公开(公告)日：2020-01-30
申请号：US16593441
申请日：2019-10-04
申请人： Kim B. Roberts , James Harley , David BOERTJES
发明人： Kim B. Roberts , James Harley , David BOERTJES
IPC分类号： H04J14/02 , H04B10/2543 , H04B10/079 , H04Q11/00 , H04B10/58
摘要： A processor of an apparatus is configured to apply one or more control algorithms using estimated data to adjust the one or more control parameters of a section of an optical fiber network. The estimated data are derived from measurements of optical signals in the section and from knowledge of the section. The estimated data is a function of optical nonlinearity and of amplified spontaneous emission.

7. 发明授权

US10439730B2 Method, device and communication system for reducing optical transmission impairments 有权
公开(公告)号：US10439730B2
公开(公告)日：2019-10-08
申请号：US14890373
申请日：2014-05-12
申请人： Xieon Networks S.a.r.l.
发明人： Antonio Napoli , Chien-Yu Lin , Bernhard Spinnler , Vincentius Antonius Johannes Mar Sleiffer
IPC分类号： H04B10/60 , H04B10/58 , H04B10/2543 , H04B10/61
摘要： A method and device is provided for reducing optical transmission impairments, particularly nonlinear effects, of at least one link Said method comprising the following steps: extracting a phase information (Δθ) from an optical signal (120) received via that at least one link, determining a nonlinear coefficient (γ), associated with the at least one link, based on the phase information (Δθ), applying a control mechanism (202) using the nonlinear coefficient (γ). Furthermore, a communication system is suggested comprising said device.

8. 发明授权

US10404372B2 System and method for processing an electromagnetic signal 有权
公开(公告)号：US10404372B2
公开(公告)日：2019-09-03
申请号：US15874585
申请日：2018-01-18
申请人： Rohde & Schwarz GmbH & Co. KG
发明人： Thomas Nowak , Christian Volle
IPC分类号： H04B10/2543 , H04B10/25 , H04B10/2575 , H04B1/14 , H04B10/58 , H04B1/18 , H04B10/85
摘要： A system for processing an electromagnetic signal is described, wherein the system comprises a transmission path with limited dynamic range and a pre-selection unit that is positioned upstream the transmission path. The pre-selection unit is configured to pre-select signal portions and to control the level of the output electromagnetic signal. Further, a method for processing an electromagnetic signal is described.

9. 发明授权

US10333621B2 Optical communication with some compensation of nonlinear optical effects 有权
公开(公告)号：US10333621B2
公开(公告)日：2019-06-25
申请号：US15434687
申请日：2017-02-16
申请人： Alcatel-Lucent USA Inc.
发明人： René-Jean Essiambre , Chongjin Xie
IPC分类号： H04B10/40 , H04B10/58 , H04B10/69 , H04B10/2543 , H04B10/61
摘要： We disclose an optical transport system configured to reduce nonlinear signal distortions using an electronic phase rotation, the phase value of which is determined using pre-filtering, e.g., via a low-pass filter, of the digital samples representing an optical communication signal prior to applying a squaring operation to the digital samples. In some embodiments, the phase value used in the electronic phase rotation can be determined using double filtering of the digital samples that, in addition to the pre-filtering, employs post-filtering, e.g., via another low-pass filter, of the digital samples generated by the squaring operation. The electronic phase rotation can be implemented as part of a backward-propagation algorithm that, in addition to reducing the nonlinear signal distortions, provides at least partial dispersion compensation. In various embodiments, the corresponding backward-propagation module can be incorporated into the transmitter's digital signal processor (DSP) or the receiver's DSP.

10. 发明申请

US20190190648A1 SYSTEMS AND METHODS FOR ERROR-FREE RECONSTRUCTION OF TRANSMITTED SYMBOLS IN A COHERENT RECEIVER 审中-公开
公开(公告)号：US20190190648A1
公开(公告)日：2019-06-20
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 , H04B10/2543 , H04L27/34
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.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式