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    • 1. 发明公开
    • METHODE DE SELECTION DE MODES POUR TRANSMISSION SUR FIBRES OPTIQUES DE TYPE MULTI-MODE OU MULTI -COEUR
    • 方法DE选择模式POUR传输SUR光纤选择DE型多模式OU多模式
    • EP3192192A1
    • 2017-07-19
    • EP15763253.0
    • 2015-09-04
    • Institut Mines-Telecom
    • AWWAD, ElieREKAYA-BEN OTHMAN, GhayaJAOUËN, Yves
    • H04B10/2581H04J14/04
    • H04B10/2581H04B7/0413H04B10/0795H04J14/04
    • The invention relates to a method for selecting modes for a system for MIMO transmission over a multimode optical fibre. Said method includes a step of measuring (110) the transfer matrix of the transmission channel consisting of a set of modes of the optical fibre, a step of converting (120) the transfer matrix into a block diagonal matrix, each block being associated with a subset of modes, a step of determining (130) the gain and/or transmission capacity for each of the mode subsets, and selecting (140) the mode subset corresponding to the greatest gain and/or capacity, the MIMO transmission system therefore using only the subset modes thus selected for transmission over the optical fibre. The invention also relates to a method for selecting cores for a system for MIMO transmission over a multicore optical fibre.
    • 本发明涉及一种用于选择用于多模光纤上的MIMO传输的系统的模式的方法。 所述方法包括以下步骤:测量(110)由光纤的一组模式组成的传输信道的传输矩阵,将传输矩阵转换(120)成块对角矩阵的步骤,每个块与 子模式,确定(130)每个模式子集的增益和/或传输容量,以及选择(140)对应于最大增益和/或容量的模式子集的步骤,MIMO传输系统因此仅使用 子集模式因此被选择用于通过光纤传输。 本发明还涉及一种用于为多核光纤上的MIMO传输的系统选择核心的方法。
    • 2. 发明公开
    • SYSTEME DE TRANSMISSION SUR FIBRE OPTIQUE MULTI-MODE ET/OU MULTI-COEUR
    • 系统ZURÜBERTRAGUNGÜBEREINE MULTIMODALE UND / ODER MEHRADRIGE OPTISCHE FASER
    • EP2724483A1
    • 2014-04-30
    • EP12730902.9
    • 2012-06-22
    • Institut Mines-Telecom
    • MUMTAZ, SamiREKAYA-BEN OTHMAN, GhayaJAOUEN, Yves
    • H04B10/00H04J14/04
    • H04B3/32H04B10/2581H04J14/0298H04J14/06H04L27/2627H04L27/2649H04L27/2697
    • The invention relates to a system for transmission over a multi-mode and/or multi-core optical fiber using space-time coding. A block of symbols to be transmitted is encoded in the form of a code matrix, and the elements of the matrix are used to modulate different beams corresponding to different propagation modes or to different cores of the fiber. Upon reception, each of said beams is demodulated, and the obtained decision variables are provided to a space-time decoder that estimates the transmitted symbols. The invention takes advantage of the diversity provided by the coupling between modes or cores of the fiber. Said diversity can be further increased by additionally using modulation over two orthogonal polarizations and/or a plurality of wavelengths by means of a propagation mode or core of the fiber.
    • 公开了一种用于弱多模光纤的光通信系统的发射机。 一个方面是一种发射机,其包括编码器,将要传输的每个符号块转换成码矩阵,矩阵的每个元素相对于使用时间和弱多模光纤的传播模式。 发射机可以包括分别与不同传播模式相关联的多个调制器,每个调制器在使用时间期间调制激光束。 每个调制器可以通过使用相应矩阵的元素来调制激光束,码的矩阵的元素预先经受所述调制器上游的OFDM调制。 每个调制光束可以被输入到弱多模光纤中以根据单独的模式在其中传播。