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    • 21. 发明申请
    • IMPROVED DATA COMPRESSION APPARATUS AND METHOD THEREFOR
    • 改进的数据压缩设备及其方法
    • WO01082508A1
    • 2001-11-01
    • PCT/GB2001/001681
    • 2001-04-17
    • G02F1/01H04B10/50H04B10/508H04J14/08H04Q11/04H04B10/155H04Q11/00
    • H04B10/508H04B10/505H04B10/5051H04B10/5053H04J14/08
    • Routers for trunk telecommunication systems currently operate at 2.5Gb/s. Next generation routers will be requires to switch 128 input data streams into 128 output data streams, each data stream being at a data rate of 10Gb/s. Current routers employ massively parallel electronic switches to route data at 1.25Gb/s. Such technology is reaching its limit and a new approach to high-speed switching is required. The present invention provides an apparatus and method for enabling such high-speed switching by providing a data compression apparatus which comprises a pulsed chirped laser (226) coupled to a modulator (218, 220), the modulator (218, 220) being coupled to a multiplexer (232) and a compressor (228). A chirped laser pulse having the duration of a data packet is modulated with data received on an input channel and then passed through the multiplexer (232) and the compressor (228) in order to generate a compressed modulated data pulse for high speed switching.
    • 中继电信系统的路由器目前运行在2.5Gb / s。 下一代路由器将需要将128个输入数据流切换为128个输出数据流,每个数据流的数据速率为10Gb / s。 当前的路由器采用大规模并行电子交换机,以1.25Gb / s路由数据。 这种技术正在达到极限,需要一种新的高速切换方法。 本发明提供了一种通过提供一种数据压缩装置来实现这种高速切换的装置和方法,所述数据压缩装置包括耦合到调制器(218,220)的脉冲啁啾激光器(226),所述调制器(218,220)耦合到 多路复用器(232)和压缩器(228)。 具有数据分组持续时间的啁啾激光脉冲由在输入通道上接收的数据进行调制,然后通过多路复用器(232)和压缩器(228),以产生用于高速切换的压缩调制数据脉冲。
    • 25. 发明申请
    • SPECTRAL INVERSION DETECTION FOR POLARIZATION-DIVISION MULTIPLEXED OPTICAL TRANSMISSION
    • 用于极化多分辨率光传输的频谱反演检测
    • WO2016087538A1
    • 2016-06-09
    • PCT/EP2015/078397
    • 2015-12-02
    • XIEON NETWORKS S.À R.L.
    • CALABRO, StefanoSPINNLER, Bernhard
    • G02F1/01H04B10/50
    • H04J14/06G02F1/0123G02F1/2255G02F2001/212G02F2201/58G02F2203/07H04B10/5053H04B10/50572
    • Disclosed herein is a modulator (50) for polarization-division multiplexing (PDM) transmission. The modulator (50) comprises first and second DP-MZMs (12, 28) associated with first and second polarizations, each DP-MZM (12, 28) having an input for an in-phase and a quadrature driving signal for modulating the in-phase and quadrature components of an optical signal according to respective transfer functions, and a detector (58) suitable for detecting light comprising at least a portion of the light outputted by the first DP-MZM (12) and a portion of the light outputted by the second DP-MZM (28). The modulator (50) is adapted to superimpose a first pilot signal on one of the in-phase and quadrature driving signals of the first DP-MZM (12) and on one of the in-phase and quadrature driving signals of the second DP-MZM (28), and a second pilot signal on the respective other of the in-phase and quadrature driving signals of the first and second DP-MZMs (12, 28). Further, the first and second pilot signals are chosen such that the signal detected by said detector (58) is indicative as to whether the slopes of the transfer functions are different for the in-phase and quadrature components of one of the first and second DP-MZMs (12, 28) and identical for the other of the first and second DP-MZMs (12, 28).
    • 本文公开了一种用于偏振分复用(PDM)传输的调制器(50)。 调制器(50)包括与第一和第二偏振相关联的第一和第二DP-MZM(12,28),每个DP-MZM(12,28)具有用于同相的输入和正交驱动信号, 根据相应的传递函数的光信号的相位和正交分量;以及检测器(58),适于检测包括由第一DP-MZM(12)输出的光的至少一部分的光和输出的光的一部分 通过第二DP-MZM(28)。 调制器(50)适于将第一导频信号叠加在第一DP-MZM(12)的同相和正交驱动信号中的一个上,并且在第二DP-MZM的同相和正交驱动信号之一上, MZM(28)和第一和第二DP-MZM(12,28)的同相和正交驱动信号的相应另一个上的第二导频信号。 此外,选择第一和第二导频信号,使得由所述检测器(58)检测的信号指示传输函数的斜率对于第一和第二DP之一的同相和正交分量是不同的 -MZM(12,28)并且对于第一和第二DP-MZM(12,28)中的另一个是相同的。
    • 26. 发明申请
    • PRE-COMPENSATION OF CHROMATIC DISPERSION USING COHERENT-LESS DSP
    • 使用无源DSP对色散进行预补偿
    • WO2014141260A1
    • 2014-09-18
    • PCT/IL2014/050260
    • 2014-03-13
    • MULTIPHY LTD.
    • SADOT, DanGORSHTEIN, AlbertSHABTAI, Avraham
    • H04B10/2513H04B10/2507H04J1/00
    • H04B10/5053H04B10/25137H04B2210/252H04B2210/254
    • A method of pre-compensating distortions of a time varying optical communication channel, comprising at the transmitter side, multiplexing of the input data streams to convert the rate of the input data streams to another desired rate at a plurality of data lanes with resulting symbols; encoding the symbols in the lanes at a sampling rate of at least the symbol rate; performing fixed pre-compensation of deterministic distortions; and performing adaptive pre-compensation of the channel, based on feedback from the channel or on side information. At the receiver side, post- compensating distortions by: adjusting the amplitude of the received signal to be at full swing in each data lane; digitizing the amplitude of the received signal to obtain a digital signal; performing adaptive ISI compensation of the symbols in each data lane; decoding the compensated symbols in the lanes to obtain a multiplexed data stream; and de- multiplexing the multiplexed data stream to reconstruct the transmitted input data streams; performing fixed pre-compensation of deterministic distortions in the channel by pre-filtering the incoming signal to reduce the aliasing; and performing adaptive post-compensation of the channel, based on blind channel estimation, channel feedback or side information.
    • 一种预补偿时变光通信信道的失真的方法,包括在发射机侧,多路复用输入数据流,以在具有所得符号的多个数据通道处将输入数据流的速率转换为另一期望速率; 以至少符号率的采样率对通道中的符号进行编码; 执行确定性扭曲的固定预补偿; 以及基于来自信道或侧面信息的反馈来执行信道的自适应预补偿。 在接收机侧,通过以下方式补偿后补偿失真:在每个数据通道中调整接收信号的幅度为全速; 数字化接收信号的幅度以获得数字信号; 对每个数据通道中的符号执行自适应ISI补偿; 解码通道中的补偿符号以获得多路复用数据流; 并且对多路复用的数据流进行解复用以重构所发送的输入数据流; 通过对输入信号进行预滤波来对信道中的确定性失真进行固定预补偿,以减少混叠; 并且基于盲信道估计,信道反馈或侧信息来执行信道的自适应后补偿。
    • 28. 发明申请
    • 送信装置、送信方法、および通信システム
    • 传输装置,传输方法和传输系统
    • WO2013008871A1
    • 2013-01-17
    • PCT/JP2012/067764
    • 2012-07-05
    • 日本電気株式会社安部 淳一
    • 安部 淳一
    • H03M1/66H04B10/00H04B10/02H04B10/18
    • H04B10/516H03M1/70H04B10/07H04B10/25137H04B10/5053H04B10/548H04B10/612H04B2210/254H04L27/2627
    •  高速で大容量なデジタル通信におけるD/A変換器の分解能不足による伝送特性の劣化を解消する送信装置を提供するため、本発明の送信装置は、入力データを符号化する符号化部11と、符号化部11からの出力信号を、この出力信号に基づく不等間隔な量子化レベル間隔を用いて、デジタルーアナログ変換部13の分解能に基づく量子化レベル数で量子化する不等間隔量子化部12と、不等間隔量子化部12からの出力信号をアナログ信号に変換するデジタルーアナログ変換部13と、あらかじめ設定された初期伝達関数と不等間隔量子化部12の伝達関数とのズレを相殺するように、デジタルーアナログ変換部13の出力レベルを調整する出力レベル調整部14と、出力レベル調整部14によって調整されたデジタルーアナログ変換部の出力信号に基づいて送信信号を生成する変調部15と、を備える。
    • 为了提供一种发送装置,用于解决在高速,大容量数字通信期间由于D / A转换器的分辨率不足导致的传输特性的劣化,该发送装置具有:编码单元(11),用于对输入 数据; 一个不等间隔量化器(12),用于基于基于数字模拟转换器(13)的分辨率的量化级数来量化来自编码单元(11)的输出信号,该数字模拟转换器基于不等间隔量化级间隔,基于 输出信号; 用于将来自不等间隔量化器(12)的输出信号转换为模拟信号的数模转换器(13) 输出电平调节器(14),用于调整数模转换器(13)的输出电平,以抵消预置的初始传递函数与不等间隔量化器(12)的传递函数之间的任何差异; 以及用于基于由所述输出电平调整器(14)调节的来自所述数模转换器的输出信号来产生发送信号的调制器(15)。