WO2017214807A1 - Procédé et dispositif d'égalisation de la diaphonie dans un système de multiplexage par repartition spatiale - Google Patents

Procédé et dispositif d'égalisation de la diaphonie dans un système de multiplexage par repartition spatiale Download PDF

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WO2017214807A1
WO2017214807A1 PCT/CN2016/085570 CN2016085570W WO2017214807A1 WO 2017214807 A1 WO2017214807 A1 WO 2017214807A1 CN 2016085570 W CN2016085570 W CN 2016085570W WO 2017214807 A1 WO2017214807 A1 WO 2017214807A1
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signal
equalization
digital signals
crosstalk
core
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PCT/CN2016/085570
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English (en)
Chinese (zh)
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黎梨
刘博�
忻向军
卢彦兆
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华为技术有限公司
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Priority to PCT/CN2016/085570 priority Critical patent/WO2017214807A1/fr
Priority to CN201680085396.1A priority patent/CN109075862B/zh
Publication of WO2017214807A1 publication Critical patent/WO2017214807A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2581—Multimode transmission

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  • the present invention relates to the field of communications technologies, and in particular, to a space division multiplexing (SDM) system crosstalk equalization method and device.
  • SDM space division multiplexing
  • MIMO multiple-input multiple-output
  • inter-core crosstalk and inter-mode crosstalk are more serious.
  • the prior art The received signal is used in the MIMO equalizer shown in Figure 1.
  • Each element hij in the matrix is a Finite Element Impulse Response (FIR) filter of length L.
  • FIR Finite Element Impulse Response
  • the receiver inputs the received six signals to In1 to In6, and outputs them from Out1 to Out6 through a 6 ⁇ 6 MIMO equalizer to complete effective equalization of the signals.
  • Embodiments of the present invention provide a crosstalk equalization method and device for an SDM system, which are used to reduce the number of FIR filters used and effectively reduce system complexity.
  • a space division multiplexing SDM system crosstalk equalization method is applied to a C-core N-mode space division multiplexing system, including:
  • the N digital signals output through the corresponding N ⁇ N MIMO equalizer are respectively resampled and coupled into a coupled digital signal to obtain a C-channel coupled digital signal, and each signal group corresponds to one coupled digital signal. signal;
  • the C-channel coupled digital signal is subjected to inter-core crosstalk equalization through a corresponding C ⁇ C MIMO equalizer.
  • the method further includes:
  • the N digital signals in each signal group are separately resampled to obtain N digital signals having the same rate.
  • the method further includes:
  • Chromatic dispersion equalization is performed on N digital signals in each signal group.
  • the method before performing the inter-core crosstalk equalization by using the C-channel coupled digital signal through a C ⁇ C MIMO equalizer, the method further includes:
  • the C-channel coupled digital signal is synchronized by a preset method to obtain a C-channel coupled digital signal having the same rate.
  • the N ⁇ N MIMO equalizer adopts a first preset equalization algorithm for equalizing inter-mode crosstalk
  • the C ⁇ C MIMO equalizer adopts a second preset equalization algorithm for equalizing inter-core crosstalk.
  • the method further includes:
  • the C-channel digital signal outputted through the C ⁇ C MIMO equalizer is shunted to obtain an M-channel equalized digital signal.
  • an SDM system crosstalk equalization device is applied to a C-core N-mode space division multiplexing system, including:
  • a memory for storing program code executed by the processor
  • the processor is respectively connected to the memory and the communication interface, and is configured to perform the following operations by using program code in the memory:
  • N digital signals in each signal group are subjected to inter-mode crosstalk equalization through an N ⁇ N MIMO equalizer;
  • the N digital signals output through the corresponding N ⁇ N MIMO equalizer are respectively resampled and coupled into a coupled digital signal to obtain a C-channel coupled digital signal, and each signal group corresponds to one coupled digital signal. signal;
  • the C-channel coupled digital signal is subjected to inter-core crosstalk equalization through a corresponding C ⁇ C MIMO equalizer.
  • the processor is further configured to:
  • the first equalization unit Before the first equalization unit performs the inter-mode crosstalk equalization of the N digital signals in each signal group through the N ⁇ N MIMO equalizer, respectively re-sampling the N digital signals in each signal group to obtain N digital signals with the same rate.
  • the processor is further configured to:
  • the chromatic dispersion dispersion is performed on the N digital signals in each of the signal groups.
  • the processor is further configured to:
  • the C-channel coupled digital signal is synchronized by using a preset manner to obtain a C-channel coupled digital signal having the same rate. signal.
  • the N ⁇ N MIMO equalizer adopts a first preset equalization algorithm for equalizing inter-mode crosstalk
  • the C ⁇ C MIMO equalizer adopts a second preset equalization algorithm for equalizing inter-core crosstalk.
  • the processor is further configured to:
  • the second equalization unit After the second equalization unit performs inter-core crosstalk equalization by the C ⁇ C MIMO equalizer, the C-channel digital signal outputted by the C ⁇ C MIMO equalizer is shunted , obtain the digital signal after the M channel is equalized.
  • an SDM system crosstalk equalization device is applied to a C-core N-mode space division multiplexing system, including:
  • N is the number of modes in each core
  • the i-th signal group contains N digital signals transmitted using the ith core, 1 ⁇ i ⁇ C, M, C , N, i are positive integers;
  • a first equalization unit configured to perform N-channel digital signal in each signal group for inter-mode crosstalk equalization through an N ⁇ N MIMO equalizer
  • a coupling unit configured to resample each N digital signal outputted by the corresponding N ⁇ N MIMO equalizer and couple it into a coupled digital signal for each signal group to obtain a C-channel coupled digital signal, each signal The group corresponds to one coupled digital signal;
  • a second equalizing unit configured to perform the inter-core crosstalk equalization by using the C-channel coupled digital signal through a corresponding C ⁇ C MIMO equalizer.
  • the device before the first equalizing unit performs the inter-mode crosstalk equalization of the N digital signals in each of the signal groups through the N ⁇ N MIMO equalizer, the device further includes:
  • the first resampling unit is configured to separately resample the N digital signals in each signal group to obtain N digital signals having the same rate.
  • the device before the first equalizing unit performs the inter-mode crosstalk equalization of the N digital signals in each of the signal groups through the N ⁇ N MIMO equalizer, the device further includes:
  • the device before the second equalization unit performs the inter-core balanced crosstalk by the C ⁇ C MIMO equalizer, the device further includes:
  • the synchronization unit is configured to synchronize the C-channel coupled digital signals by using a preset manner to obtain C-channel coupled digital signals having the same rate.
  • the N ⁇ N MIMO equalizer adopts a first preset equalization algorithm for equalizing inter-mode crosstalk
  • the C ⁇ C MIMO equalizer adopts a second preset equalization algorithm for equalizing inter-core crosstalk.
  • the apparatus further includes:
  • the branching unit is configured to split the C-channel digital signal outputted by the C ⁇ C MIMO equalizer to obtain an M-channel equalized digital signal.
  • the DSP module performs N-channel digital signal in each signal group through an N ⁇ N MIMO equalizer for inter-mode crosstalk equalization, that is, first performs inter-mode crosstalk equalization. Then, for each signal group, the N digital signals output through the corresponding N ⁇ N MIMO equalizer are respectively resampled and coupled into a coupled digital signal to obtain a C-channel coupled digital signal, and each signal group corresponds to one channel.
  • the digital signal is coupled, and the C-channel coupled digital signal is subjected to inter-core crosstalk equalization through a corresponding C ⁇ C MIMO equalizer, that is, the inter-core crosstalk equalization is performed. Therefore, by simplifying the traditional M ⁇ M MIMO equalizer, the core crosstalk and the inter-mode crosstalk are balanced in a targeted manner, which effectively reduces the number of FIR filters used and reduces system complexity.
  • FIG. 1 is a schematic structural diagram of a conventional MIMO equalizer in the background art of the present invention.
  • FIG. 2(a) is a schematic diagram of a multimode multi-core optical link in an embodiment of the present invention
  • 2(b) is a schematic diagram of inter-mode crosstalk in a core according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a multimode multi-core space division multiplexing system according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of signal conversion from a mode demultiplexer to a DSP module according to an embodiment of the present invention
  • FIG. 5 is a flowchart of an overview of crosstalk equalization of an SDM system according to an embodiment of the present invention.
  • FIG. 6 is a specific flowchart of crosstalk equalization of an SDM system according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a MIMO equalizer based on matrix transformation according to an embodiment of the present invention.
  • FIG. 8 is a comparison diagram of the number of FIR filters required by a conventional MIMO equalizer and a matrix-based MIMO equalizer according to an increase in the number of cores and modes in the system according to an embodiment of the present invention
  • FIG. 9 is a schematic structural diagram of a crosstalk equalization device of an SDM system according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a crosstalk equalization apparatus of an SDM system according to an embodiment of the present invention.
  • Embodiments of the present invention provide a crosstalk equalization method and apparatus for an SDM system, which are used to reduce the number of FIR filters used and effectively reduce system complexity.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.
  • FIG. 2(a) for a schematic diagram of a multimode multi-core optical link.
  • the number of cores in the system is 3, which are Core_1, Core_2, and Core_3, respectively.
  • Each core includes three transmission modes, LP 01 , LP 11-a , and LP 11-b .
  • the crossover of the three cores introduces inter-core crosstalk to the signal, and the three modes in each core interact to introduce inter-mode crosstalk to the signal.
  • Figure 2(b) shows the inter-mode crosstalk in one core, and the overlapping arrows in Figure 2(b) indicate crosstalk between modes.
  • FIG. 3 a schematic structural diagram of a multimode multi-core space division multiplexing system is shown.
  • 31, 310, 311 are optical transmitters
  • 38, 315, and 316 are optical receivers
  • 32, 37, 313, and 314 are spatial phase discs, and their functions are conversion between a fundamental mode and a high-order mode
  • 33 and 36 is a multiplexing/demultiplexing module
  • 34 is based on a multimode multi-core optical link
  • 35 is an Erbium-doped Optical Fiber Amplifier (EDFA)
  • EDFA Erbium-doped Optical Fiber Amplifier
  • 39 is a digital signal processing module.
  • EDFA Erbium-doped Optical Fiber Amplifier
  • the function of the digital signal processing module is to weaken the mode coupling between the modes and the crosstalk effect of the coupling between the cores on the useful signal, that is, to balance the inter-mode crosstalk in the signal.
  • Crosstalk between cores Corresponding to FIG. 2, in FIG. 3, three transmission modes, LP 01 , LP 11-a , and LP 11-b , are also embodied.
  • the optical signals output after the 36-mode demultiplexer respectively represent different cores. Different modes of light signals. Each optical signal enters an optical signal receiver, and the optical signal receiver converts the optical signal into an electrical signal (here, an analog electrical signal), and an analog-to-digital converter (ADC) corresponding to the receiver
  • the electrical signals of all the channels are analog-to-digital converted, the analog electrical signals are converted into digital signals, and then all the digital signals are input into the DSP module to perform equalization of signal inter-mode crosstalk and inter-core crosstalk to obtain information of the transmitting end.
  • the circuit simulates an electrical signal, and then performs analog-to-digital conversion through the ADC module to obtain 9 digital signals, which are input to the DSP module.
  • an embodiment of the present invention provides a crosstalk equalization method for an SDM system, which is applied to a C-core N-mode SDM system, including:
  • Step 500 The DSP module acquires M digital signals, and divides the M digital signals into C signal groups according to the core used to transmit the optical signals corresponding to each digital signal.
  • M C ⁇ N
  • C is the number of cores in the system
  • N is the number of modes in each core
  • the i-th signal group contains N digital signals transmitted using the ith core, 1 ⁇ i ⁇ C, M, C, N, i are all positive integers.
  • the DSP module divides the nine digital signals into three signal groups by using the core used for transmitting the optical signals corresponding to each digital signal, wherein the first signal group corresponding to Core_1 includes 3 transmitted by Core_1.
  • Step 510 The DSP module performs the inter-mode crosstalk equalization by the N digital signal in each signal group through the N ⁇ N MIMO equalizer.
  • the DSP module Before the N digital signals in each signal group are subjected to the inter-mode crosstalk equalization through the N ⁇ N MIMO equalizer, the DSP module also needs to perform the following operations: performing chromatic dispersion on the N digital signals in each signal group. Equalization, and re-collecting N digital signals in each signal group Thus, N digital signals having the same rate are obtained.
  • the reason for resampling the N digital signals in each signal group here is that the N digital signals in the group may come from different ADC modules and are resampled to ensure clock alignment between the N digital signals, so that the group The inner N digital signals have the same rate.
  • Step 520 The DSP module resamples and couples the N digital signals outputted by the corresponding N ⁇ N MIMO equalizers into a coupled digital signal for each signal group to obtain a C-channel coupled digital signal, and each signal The group corresponds to one coupled digital signal.
  • the DSP module resamples and couples the N digital signals outputted by the corresponding N ⁇ N MIMO equalizer into a coupled digital signal, which can be implemented by means of symbol interpolation.
  • N For example, for a C-core N-mode SDM system, for each group of N digital signals output through an N ⁇ N MIMO equalizer, assuming that the rate of the N digital signals is T, the rate can be resampled and combined into one. N*T coupled digital signal.
  • the C module can be configured with C re-sampling modules to obtain C-channel coupled digital signals.
  • the C-channel coupling must be synchronized by a preset method.
  • the digital signal obtains a C-channel coupled digital signal having the same rate, and the preset mode here may be a shared clock or the like.
  • Step 530 The DSP module performs C-channel crosstalk equalization by the C-channel coupled digital signal through a corresponding C ⁇ C MIMO equalizer.
  • the C-channel coupled digital signal is subjected to inter-core crosstalk equalization by the C ⁇ C MIMO equalizer
  • the C-channel digital signal outputted by the C ⁇ C MIMO equalizer is split to obtain the M-channel equalized number. Signal for subsequent signal analysis processing.
  • the C-channel digital signal outputted by the C ⁇ C MIMO equalizer is decoupled and split, wherein the decoupled beam splitting can be performed by downsampling or interval symbol extraction.
  • the M ⁇ M MIMO equalizer is used to equalize the inter-mode crosstalk and the inter-core crosstalk, as shown in the matrix on the left.
  • the matrix of M ⁇ M is transformed into the following form:
  • the (N ⁇ C) 2 dimension tap matrix is transformed into C N*N small tap modular matrices. (ie N ⁇ N MIMO equalizer) and a C*C core matrix (ie C ⁇ C MIMO equalizer).
  • the main function is to equalize the damage caused by the multiplexing coupling between the modes in the same core in the signal, that is, to perform inter-mode crosstalk equalization.
  • each core will also damage the signal due to link bending, inter-core coupling, etc., so the matrix
  • the role of the signal is to equalize the damage caused by the interaction between the cores, that is, the crosstalk between cores.
  • the N ⁇ N MIMO equalizer adopts a first preset equalization algorithm
  • the C ⁇ C MIMO equalizer adopts a second preset equalization algorithm.
  • the first preset equalization algorithm and the first preset equalization algorithm may be a constant modulus algorithm (CMA) or an adaptive filter equalization algorithm such as Least Mean Square (LMS).
  • the first preset equalization algorithm may be the same as or different from the second preset equalization algorithm.
  • CMA constant modulus algorithm
  • LMS Least Mean Square
  • the first preset equalization algorithm may be the same as or different from the second preset equalization algorithm.
  • Inter-core crosstalk has less interference with the signal than inter-mode crosstalk, so the crosstalk between cores can be compared with a simpler adaptive algorithm. Therefore, the complexity of the second preset equalization algorithm is generally lower than the complexity of the first preset equalization algorithm.
  • the DSP module divides C ⁇ N digital signals into C groups, each group containing N digital signals from the same core, Each group
  • the N digital signals are resampled, that is, resampled for R11, R12...R1n in the first group, and resampled for R21, R22...R2n in the first group... for Rc1, Rc2 in the first group Rcn is resampled and input to the corresponding N ⁇ N MIMO equalizer for equalizing the inter-mode crosstalk, and re-sampling the N signals of each group to obtain a corresponding one-way digital signal of each group.
  • the C-channel coupled digital signal is input into a C ⁇ C MIMO equalizer for equalizing inter-core crosstalk, and the output C-channel digital signal is split to obtain C ⁇ N equalized digital signals.
  • a conventional MIMO equalizer method requires a 9*9 MIMO equalizer, and the method provided by the embodiment of the present invention requires three 3*3 MIMO equalizations.
  • a 3*3 MIMO equalizer for inter-core crosstalk equalization For inter-mode crosstalk equalization, and a 3*3 MIMO equalizer for inter-core crosstalk equalization.
  • the DSP module acquires 9 digital signals, and then divides the 9 digital signals into 3 signal groups according to the core corresponding to each digital signal, and inputs 3 digital signals in each signal group into one 3*3.
  • the MIMO equalizer uses CMA for inter-mode crosstalk equalization, and resamples and couples three output digital signals of each signal group into one coupled digital signal, and obtains three 3 ⁇ 3 MIMO equalizations for three coupled digital signals.
  • the CMA is used for crosstalk crosstalk between cores.
  • the traditional (N ⁇ C) 2 dimension tap matrix is transformed and simplified, thereby reducing the number of FIR filters used and reducing system complexity.
  • the inter-mode crosstalk is equalized, the output signal is resampled and coupled into a C-channel coupled digital signal, and the crosstalk between the cores is equalized.
  • each tap matrix can be regarded as independent of each other, and the equalization algorithm and the number of taps can be changed according to the inter-core crosstalk and inter-mode crosstalk in the system. Parameters.
  • Table 1 compares the number of FIR filters required for a conventional MIMO equalizer with the number of FIR filters required for a matrix-based MIMO equalizer in the embodiment of the present invention.
  • the figure on the right is the MIMO equalization method based on matrix transformation (shown in the new MIMO equalization on the right in Figure 8).
  • the number of FIR filters changes. It can be seen from Table 1 and FIG. 8 that the scale of the tap matrix after the conversion is significantly smaller than that of the conventional MIMO equalization matrix.
  • the number of FIR filters required by the conventional MIMO equalization method is about 7 times that of the MIMO equalization method based on the matrix transform.
  • the embodiment of the present invention further provides an SDM system crosstalk equalization device, which is repeated in the embodiment corresponding to the embodiment corresponding to FIG. The content will not be described again.
  • an embodiment of the present invention provides an SDM system crosstalk equalization device 90, which is applied to a C-core N-mode space division multiplexing system, and includes:
  • a memory 92 configured to store program code executed by the processor 93;
  • the processor 93 is connected to the memory 92 and the communication interface 91 respectively for performing the following operations through the program code in the memory 93:
  • N digital signals in each signal group are subjected to inter-mode crosstalk equalization through an N ⁇ N MIMO equalizer;
  • the N digital signals output through the corresponding N ⁇ N MIMO equalizer are respectively resampled and coupled into a coupled digital signal to obtain a C-channel coupled digital signal, and each signal group corresponds to one coupled digital signal. signal;
  • the C-channel coupled digital signal is subjected to inter-core crosstalk equalization through a corresponding C ⁇ C MIMO equalizer.
  • the SDM system crosstalk equalization device herein may be a DSP module. It should be noted that the connection manner between the parts shown in FIG. 9 is only one possible example, and the communication interface 91 and the memory 92 may both be combined with the processor. 93 is connected, and there is no connection between the communication interface 91 and the memory 92, or other possible connection methods. In addition, the processor 93 can also perform the above operations through program code in an external memory.
  • the processor 93 is further configured to:
  • the N digital signals in each signal group are separately resampled to obtain the rate.
  • the same N digital signal is separately resampled.
  • the processor 93 is further configured to:
  • the chromatic dispersion dispersion is performed on the N digital signals in each of the signal groups.
  • the processor 93 is further configured to:
  • the C-channel coupled digital signal is synchronized by a preset manner to obtain a C-channel coupled digital signal having the same rate.
  • the N ⁇ N MIMO equalizer uses a first preset equalization algorithm for equalizing inter-mode crosstalk
  • the C ⁇ C MIMO equalizer uses a second preset equalization algorithm for equalizing inter-core crosstalk.
  • the processor 93 is further configured to:
  • the C-channel coupled digital signal is subjected to inter-core crosstalk equalization by the C ⁇ C MIMO equalizer in the second equalization unit
  • the C-channel digital signal outputted by the C ⁇ C MIMO equalizer is split to obtain the M-channel equalization. Digital signal.
  • an embodiment of the present invention further provides an SDM system crosstalk equalization device, which is in this embodiment and FIG. 5 and FIG. The repeated content of the corresponding embodiment will not be described again.
  • an SDM system crosstalk equalization device is applied to the C-core N-mode air separation.
  • Reuse system including:
  • a first equalization unit 1001 configured to perform N-channel digital signal in each signal group for inter-mode crosstalk equalization through an N ⁇ N MIMO equalizer
  • the coupling unit 1002 is configured to resample the N digital signals outputted by the corresponding N ⁇ N MIMO equalizers and couple them into a coupled digital signal for each signal group to obtain C-channel coupled digital signals, each of which The signal group corresponds to one coupled digital signal;
  • the second equalization unit 1003 is configured to perform cross-core crosstalk equalization by using the C-channel coupled digital signal through a corresponding C ⁇ C MIMO equalizer.
  • the device further includes:
  • the resampling unit 1004 is configured to: before the first equalization unit performs the inter-mode crosstalk equalization of the N digital signals in each signal group through the N ⁇ N MIMO equalizer, the N digital numbers in each signal group The signals are separately resampled to obtain N digital signals having the same rate.
  • the device further includes:
  • the chromatic dispersion equalization unit 1005 is configured to: before the first equalization unit performs the inter-mode crosstalk equalization of the N digital signals in each signal group through the N ⁇ N MIMO equalizer, for each signal group N
  • the digital signal is chromatic dispersion balanced.
  • the device further includes:
  • the synchronization unit 1006 is configured to: before the second equalization unit performs the inter-core balanced crosstalk by the C ⁇ C MIMO equalizer, synchronize the C-channel coupled digital signals by using a preset manner to obtain the same The rate of the C-channel couples the digital signal.
  • the N ⁇ N MIMO equalizer adopts a first preset equalization algorithm for equalizing inter-mode crosstalk
  • the C ⁇ C MIMO equalizer adopts a second preset equalization algorithm for equalizing inter-core crosstalk.
  • the device further includes:
  • the branching unit 1007 is configured to: after the C-channel coupled digital signal passes the C ⁇ C MIMO equalizer for inter-core crosstalk equalization, the second equalization unit outputs the C ⁇ C MIMO equalizer The C-channel digital signal is split to obtain the M-channel balanced digital signal.
  • the DSP module performs N-channel digital signal in each signal group through an N ⁇ N MIMO equalizer for inter-mode crosstalk equalization, that is, first performs inter-mode crosstalk equalization. Then, for each signal group, the N digital signals output through the corresponding N ⁇ N MIMO equalizer are respectively resampled and coupled into a coupled digital signal to obtain a C-channel coupled digital signal, and each signal group corresponds to one channel.
  • the digital signal is coupled, and the C-channel coupled digital signal is subjected to inter-core crosstalk equalization through a corresponding C ⁇ C MIMO equalizer, that is, the inter-core crosstalk equalization is performed.
  • the core crosstalk and the inter-mode crosstalk are balanced in a targeted manner, which effectively reduces the number of FIR filters used and reduces system complexity.
  • the equalization parameters such as the adaptive algorithm and the number of taps of the MIMO equalizer can be changed.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
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Abstract

L'invention concerne un procédé et un dispositif d'égalisation de la diaphonie dans un système SDM, utilisés pour réduire le nombre de filtres FIR utilisés, et réduire efficacement la complexité du système ; le procédé consiste à : faire en sorte qu'un module DSP acquière M signaux numériques et, selon le coeur de fibre utilisé pour transmettre un signal optique correspondant à chacun des signaux numériques transmis, divise les M signaux numériques en C groupes de signaux ; mettre en oeuvre une égalisation de la diaphonie inter-modules de N signaux numériques dans chaque groupe de signaux au moyen d'un égaliseur MIMO N x N ; pour chaque groupe de signaux, mettre respectivement en oeuvre un rééchantillonnage des N signaux numériques fournis en sortie par l'égaliseur MIMO N x N correspondant, et les injecter dans un signal numérique couplé pour obtenir C signaux numériques couplés, chaque groupe de signaux correspondant à un signal numérique couplé ; et mettre en oeuvre une égalisation de la diaphonie inter-coeurs des C signaux numériques couplés au moyen d'un égaliseur MIMO C x C correspondant.
PCT/CN2016/085570 2016-06-13 2016-06-13 Procédé et dispositif d'égalisation de la diaphonie dans un système de multiplexage par repartition spatiale WO2017214807A1 (fr)

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CN201680085396.1A CN109075862B (zh) 2016-06-13 2016-06-13 一种空分复用系统串扰均衡方法及设备

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