WO2011157128A2 - 光信号处理方法及装置 - Google Patents
光信号处理方法及装置 Download PDFInfo
- Publication number
- WO2011157128A2 WO2011157128A2 PCT/CN2011/074979 CN2011074979W WO2011157128A2 WO 2011157128 A2 WO2011157128 A2 WO 2011157128A2 CN 2011074979 W CN2011074979 W CN 2011074979W WO 2011157128 A2 WO2011157128 A2 WO 2011157128A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical signal
- polarization
- channel
- training sequence
- filter coefficients
- Prior art date
Links
Classifications
-
- 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
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2572—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to forms of polarisation-dependent distortion other than PMD
Definitions
- Embodiments of the present invention relate to the field of signal processing, and in particular, to an optical signal processing method and apparatus. Background technique
- Optical signal-to-noise ratio gain of about 3dB, and electrical equalization technology can be used to fully compensate for the effects of dispersion (CD, Color Dispersion) and Polarization Mode Dispersion (PMD) in the channel.
- CD Dispersion
- PMD Polarization Mode Dispersion
- a typical polarization multiplexing coherent receiver in the prior art as shown in FIG. 1, the received optical signal is divided into x/y signals by a polarization beam splitter 101, and respectively sent to a 90° hybrid.
- the frequency converters 103x and 103y pass through the photodetector 104 and the analog-to-digital converter 105 to obtain N-sampled (N is usually 2) digital signals I x , Q x , Iy, Qy.
- I x , Q x , Iy , Q y are respectively input to the x/y channel dispersion compensators 106x and 106y for dispersion compensation, and after the dispersion compensation is completed, the synchronization sequence is performed by the synchronizer 110, that is, the synchronizer 110 uses the dispersion compensation.
- the optical signal is correlated with the training sequence to obtain a correlation peak, and a synchronization result is obtained according to the correlation peak, and then the polarization crossover is determined according to the synchronization result, so that the polarization compensator 107 adjusts the filter coefficient.
- the dispersion-compensated optical signal is input to the polarization compensator 107 to perform polarization demultiplexing and equalization, and then the training sequence and the equalized optical signal are input to the phase restorers 108x and 108y for phase recovery, respectively, and finally input to the decoders 109x and 109y. , restore the original bitstream data.
- the dispersion-compensated optical signal is correlated with the training sequence to obtain a correlation peak.
- the optical signal X and y are mixed together, so that the X-channel optical signal and the y-path optical signal each have relatively large damage. If the X-channel optical signal is directly correlated with the X-channel training sequence, or the y-channel optical signal is correlated with the y-way training sequence, there may be cases where the peak is not obvious or there are multiple peaks, so the training sequence is not easily synchronized. Accurate, thus reducing the light Number synchronization stability.
- the embodiment of the invention provides an optical signal processing method and device, which can effectively improve the synchronization stability of the optical signal.
- a mixer for mixing the received input optical signal; a photodetector for photoelectrically detecting the mixed optical signal; and an analog to digital converter for performing photodetection of the optical signal a dispersion compensator for performing dispersion compensation on the optical signal after analog-to-digital conversion to obtain a first polarization multiplexed optical signal and a second polarization multiplexed optical signal; and a polarization compensator for initializing the filter coefficients Updating the process, and performing polarization compensation on the first polarization-multiplexed optical signal and the second polarization-multiplexed optical signal by using the filter coefficient after initializing the update to obtain an initial X-channel optical signal and initializing the y-channel optical signal; And synchronizing the preset X-channel training sequence and the y-way training sequence by using the initializing X-ray optical signal and initializing the y-way optical signal, and correcting the polarization crossover when the synchronization result indicates that polarization crossing occurs.
- the first multiplexed optical signal and the second multiplexed optical signal are first used. Polarization compensation is performed, and then the synchronization of the training sequence is performed. Since the polarization compensation separates the optical signals of different paths, the synchronization of the training sequence is not affected by the damage of the optical signal, thereby effectively improving the synchronization of the optical signal. Sex.
- DRAWINGS 1 is a schematic diagram of a prior art optical signal processing flow
- FIG. 2 is a schematic diagram of an embodiment of an optical signal processing method according to the present invention.
- FIG. 3 is a schematic diagram of another embodiment of an optical signal processing method according to the present invention.
- FIG. 4 is a schematic diagram of an optical signal processing apparatus of the present invention.
- FIG. 5 is a schematic diagram of a process of processing an optical signal according to the present invention.
- Figure 6 is a schematic view of a polarization compensator of the present invention.
- the embodiment of the invention provides an optical signal processing method and device, which can effectively improve the synchronization stability of the optical signal.
- an embodiment of the optical signal processing method of the present invention includes:
- the optical signal processing device can receive the input optical signal, and then perform the mixing, the photoelectric detection, the analog-to-digital conversion, and the dispersion compensation on the input optical signal and the local oscillator optical signal generated by the local laser to obtain the first polarization complex.
- the optical signal is multiplexed with the optical signal and the second polarization.
- the polarization compensator in the optical signal processing device can be implemented by using an adaptive filter. After the first polarization multiplexed optical signal and the second multiplexed multiplexed optical signal are obtained, the polarization compensator can be The filter coefficients are initialized and updated, and polarization correction is performed on the first polarization-multiplexed optical signal and the second polarization-multiplexed optical signal by using the filter coefficients after initialization and updating to obtain an initial X-channel optical signal and initialize the y-channel optical signal. .
- the optical signal processing device may synchronize the preset X-channel training sequence and the y-channel training sequence by initializing the X-channel optical signal and initializing the y-channel optical signal.
- the X-channel training sequence and the y-way training sequence are preset in the optical signal processing apparatus.
- the optical signal processing device synchronizes the preset X-channel training sequence and the y-way training sequence by initializing the X-channel optical signal and initializing the y-path optical signal, and determining whether a polarization crossover occurs according to the synchronization result. If a polarization crossover occurs, The optical signal processing device can then correct the polarization crossover.
- the optical signal processing device obtains the first polarization multiplexed optical signal and the second polarization multiplexed optical signal
- the first multiplexed multiplexed optical signal and the second multiplexed multiplexed optical signal are first performed.
- Polarization compensation then the synchronization of the training sequence is performed. Since the polarization compensation separates the optical signals of different paths, when the training sequence is synchronized, it is not affected by the damage of the optical signal, thereby effectively improving the synchronization stability of the optical signal. .
- optical signal processing method of the present invention is described in detail with reference to a specific example.
- another embodiment of the optical signal processing method of the present invention includes:
- the optical signal processing device can receive the input optical signal, and then input the input optical signal and the local oscillator optical signal generated by the local laser to the two mixers for mixing processing to obtain four mixed signals;
- the four-way mixing signals are respectively input into four photodetectors for photodetection, and after the photodetection is completed, four 4 really signals are output;
- the four detection signals are respectively input into four analog-to-digital converters for analog-to-digital conversion, and the analog-to-digital conversion is performed to output four digital signals, which are I x , Q x , Iy , Qy;
- I x (3 ⁇ 4 input a dispersion compensator for dispersion compensation, and output the first polarization multiplexed optical signal, Iy, Q y input to another dispersion compensator for dispersion compensation, and output second polarization multiplexed light signal.
- the polarization compensator in the optical signal processing device can be implemented by using an adaptive filter. After obtaining the first polarization multiplexed optical signal and the second polarization multiplexed optical signal, the polarization compensator can be used. The filter coefficients are initialized and updated.
- the initialization update process refers to the update of the filter coefficients in the initial state. It should be noted that the optical signal processing device in this embodiment first enters the initialization state for parameter debugging and correcting the polarization crossover when the operation is started. .
- the first modified polarization optical signal may be polarization-compensated using the filter coefficients of the X-path filter after initialization and updating to obtain an initial X-channel optical signal, and the filter of the y-channel filter after initialization and updating may be used.
- the coefficient of the second polarization-multiplexed optical signal is polarization-compensated to obtain an initial y-path optical signal.
- the initialization update process in this embodiment may be specifically updated by using a blind equalization coefficient, and the specific update manner may be:
- the initial X-ray optical signal output by the polarization compensator and the mode of initializing the y optical signal are kept constant, since the input first polarization multiplexed optical signal and the second polarization multiplexed optical signal are dynamic Change, so the filter coefficients can be updated according to the principle of constant modulus.
- the blind equalization coefficient update may be a blind equalization coefficient update without decision feedback.
- the optical signal processing device may synchronize the preset X-channel training sequence and the y-channel training sequence by initializing the X-channel optical signal and initializing the y-channel optical signal.
- the X-channel training sequence and the y-way training sequence are preset in the optical signal processing apparatus.
- the specific synchronization process can be:
- the initial X-ray optical signal is correlated with the X-channel training sequence to obtain a first correlation peak
- the initial y-channel optical signal is correlated with the y-channel training sequence to obtain a second correlation peak
- the X-channel optical signal and the y-channel training sequence are initialized.
- Correlation is obtained to obtain a third correlation peak
- the initial y optical signal is correlated with the X-channel training sequence to obtain a fourth correlation peak.
- the synchronization result indicates that polarization crossover occurs, correcting the polarization crossover;
- the first correlation peak and the second correlation peak are both greater than or equal to a preset threshold, and the third correlation peak and the fourth correlation peak are both smaller than a preset threshold, determining that no polarization occurs cross;
- the third correlation peak and the fourth correlation peak are both greater than or equal to the preset threshold P ⁇ , and the first correlation peak and the second correlation peak are both smaller than the preset threshold, it is determined that the polarization crossover has occurred.
- the filter coefficients of the X-path filter and the filter coefficients of the y-channel filter in the polarization compensator can be exchanged, that is, the filter coefficients of the X-path filter and the y-channel
- the filter coefficients of the filter are swapped.
- the X-path filter output can be initialized to the X-channel optical signal, and the y-channel filter output initializes the y-path optical signal, thereby correcting the polarization crossover.
- the step may be directly performed.
- the optical signal processing device After the optical signal processing device completes the parameter debugging and the correction of the polarization crossover, and can be switched to the working state, the optical signal processing device performs the mixing, photoelectric detection, and the like on the newly received input optical signal. Processing such as analog-to-digital conversion and dispersion compensation obtains a new first polarization-multiplexed optical signal and a second polarization-multiplexed optical signal.
- the optical signal processing device can perform a work update process on the filter coefficients of the polarization compensator in an operating state.
- the work update process in this embodiment may be specifically updated by using a blind equalization coefficient.
- the specific update mode may be:
- the mode of the working X-ray optical signal and the working y-path optical signal output by the polarization compensator are kept constant, because the newly input first polarization-multiplexed optical signal and the second-channel polarization multiplexed optical signal are dynamic The change, so the filter coefficients can be updated according to the principle of constant modulus.
- the blind equalization coefficient update may be a blind equalization coefficient update without decision feedback, or may be a blind equalization coefficient update with decision feedback.
- the training sequence is targeted to make it as close as possible to the training sequence.
- the filter coefficients of the X-channel filter are updated by the X-channel training sequence, and the filter coefficients of the y-channel filter are trained by the y-channel.
- the sequence is updated.
- the optical signal processing device may perform phase recovery on the working X-channel optical signal according to the preset X-channel training sequence to obtain an X-channel output optical signal, and The phase recovery of the working y optical signal is performed according to the preset y-way training sequence to obtain the y-channel output optical signal.
- phase recovery can be:
- the optical signal processing device estimates the initial phase of the working X-channel optical signal by using a periodic X-channel training sequence, and then uses the phase-locked loop to track the phase change of the working X-channel optical signal according to the initial phase of the working X-path optical signal, thereby performing phase recovery. .
- phase recovery for the working y optical signal is similar, and will not be described here.
- the optical signal processing device obtains the X-channel output optical signal and the y-channel output optical signal
- the X-channel output optical signal and the y-channel output optical signal can be respectively decoded to obtain the original optical signal, which is not limited herein.
- the optical signal processing device obtains the first polarization multiplexed optical signal and the second polarization multiplexed optical signal
- the first multiplexed multiplexed optical signal and the second multiplexed multiplexed optical signal are first performed.
- Polarization compensation then the synchronization of the training sequence is performed. Since the polarization compensation separates the optical signals of different paths, when the training sequence is synchronized, it is not affected by the damage of the optical signal, thereby effectively improving the synchronization stability of the optical signal.
- the blind equalization coefficient update may be used, or the training sequence auxiliary coefficient update may be used, thereby improving the flexibility of the solution.
- an embodiment of the optical signal processing apparatus of the present invention includes:
- a mixer 403 configured to mix the received input optical signal
- a photodetector 404 configured to perform photoelectric detection on the mixed optical signal
- An analog-to-digital converter 405, configured to perform analog-to-digital conversion on the optical signal after photodetection;
- a dispersion compensator 406 configured to perform dispersion compensation on the optical signal after the analog-to-digital conversion to obtain a first polarization multiplexed optical signal and a second polarization multiplexed optical signal;
- the polarization compensator 407 is configured to initialize and update the filter coefficients, and perform polarization compensation on the first polarization-multiplexed optical signal and the second polarization-multiplexed optical signal by using the initialized and updated filter coefficients to obtain an initial X path.
- a synchronizer 408 configured to initialize the X-channel optical signal and initialize the y-way optical signal pair preset
- the X-way training sequence and the y-way training sequence are synchronized, and when the synchronization result indicates that polarization crossing occurs, the polarization crossover is corrected.
- a local laser 401 for generating a local oscillator signal
- a polarization beam splitter 402 configured to split the local oscillator signal and the input optical signal into a mixer
- the polarization compensator 407 in this embodiment may be further configured to perform a work update process on the filter coefficients, and use the updated filter coefficients to work on the new first polarization multiplexed optical signal and the second polarization multiplexing.
- the optical signal is polarization-compensated to obtain a working X-channel optical signal and a working y-path optical signal;
- the optical signal processing apparatus in this embodiment may further include:
- the phase restorer 409 is configured to perform phase recovery on the X-ray optical signal according to the preset X-channel training sequence to obtain an X-channel output optical signal, and perform phase recovery on the working y-path optical signal according to the preset y-way training sequence. y way output light signal;
- the decoder 410 is configured to separately decode the X-channel output optical signal and the y-channel output optical signal. For ease of understanding, the interaction between the devices of the optical signal processing apparatus of the present invention will be described in detail below with reference to a specific application scenario. Referring to FIG. 5:
- the input optical signal When the input optical signal is received, the input optical signal is divided into x/y paths by the polarization beam splitter 502.
- the signals are respectively sent to the 90° mixers 503x and 503y.
- the local oscillator signal is generated by the local laser 501, and the local oscillator signal is also divided into x/y signals by the polarization beam splitter 502, and sent separately.
- the mixers 503x and 503y respectively output two mixing signals; the four mixing signals are respectively input to the four photodetectors 504 for photoelectric detection, and the four detection signals are output after the photoelectric detection is completed;
- the four detection signals are respectively input into four analog-to-digital converters 505 for analog-to-digital conversion, and the analog-to-digital conversion is performed to output four digital signals, which are I x , Q x , I y , Q y ;
- Ix (3 ⁇ 4 input dispersion compensator 506x performs dispersion compensation, and outputs a first polarization multiplexed optical signal
- Iy, Q y is input to a dispersion compensator 506y for dispersion compensation, and outputs a second polarization multiplexed optical signal.
- An initialization update process is performed on the filter coefficients of the adaptive filter in the polarization compensator 507, and the initialization update flow refers to the filter coefficient update in the initialization state.
- the optical signal processing apparatus in this embodiment is When the operation is started, it will first enter the initialization state for parameter debugging and correction of polarization crossover.
- the initialization update process may be performed by using a blind equalization coefficient.
- the specific update method may be: using a constant modulus algorithm, so that the initial X-ray optical signal output by the polarization compensator and the mode of initializing the y optical signal are kept constant, due to the first input.
- the path polarization multiplexed optical signal and the second polarization multiplexed optical signal change dynamically, so the filter coefficients can be updated according to the principle of constant modulus.
- the blind equalization coefficient update may be a blind equalization coefficient update without decision feedback.
- the obtained first polarization multiplexed optical signal and the second polarization multiplexed optical signal can be simultaneously input to the polarization compensator 507 for polarization compensation.
- the specific structure of the polarization compensator 507 in this embodiment can be as shown in FIG. 6, wherein, Wxx,
- Wyx, W Xy and Wyy are the filter coefficients of the adaptive filter, respectively, where Wyx is the filter coefficient of the X-path filter, and W X y and Wyy are the filter coefficients of the y-path filter.
- the synchronizer 508 may adopt an initialization X-channel optical signal. And initializing the y-way optical signal to synchronize the preset X-way training sequence and the y-way training sequence;
- an X-channel training sequence is preset in the optical signal processing apparatus and y road training sequence.
- the specific synchronization process of synchronizer 508 can be:
- the initial X-ray optical signal is correlated with the X-channel training sequence to obtain a first correlation peak
- the initial y-channel optical signal is correlated with the y-channel training sequence to obtain a second correlation peak
- the X-channel optical signal and the y-channel training sequence are initialized.
- Correlation is obtained to obtain a third correlation peak
- the initial y optical signal is correlated with the X-channel training sequence to obtain a fourth correlation peak.
- the third correlation peak and the fourth correlation peak are both greater than or equal to a preset threshold, and both the first correlation peak and the second correlation peak are less than a preset threshold, it is determined that polarization crossing occurs.
- the polarization compensator 507 can exchange the filter coefficients of the X-path filter and the filter coefficients of the y-path filter, that is, exchange W and W xy , and exchange with Wyy to make
- the X-path filter output initializes the X-channel optical signal
- the y-channel filter outputs the y-channel optical signal to correct the polarization crossover.
- the optical signal processing device can enter the active state from the initialization state.
- the local laser 501 In the operating state, the local laser 501, the polarization beam splitter 502, 90. Mixer 503x, 90.
- the operations performed by the mixer 503y, the photodetector 504, the analog-to-digital converter 505, the dispersion compensator 506x, and the dispersion compensator 506y are all the same as those in the case where the aforementioned optical signal processing apparatus is in an initialization state, specifically no longer here. Narration.
- the optical signal processing device can perform a work update process on the filter coefficients of the polarization compensator 507 under operation.
- the work update process in this embodiment may be specifically updated by using a blind equalization coefficient.
- the specific update mode may be:
- the mode of the working X-channel optical signal and the working y-path optical signal output by the polarization compensator 507 is kept constant, because the newly input first polarization multiplexed optical signal and the second polarization multiplexed optical signal will Dynamic changes, so the filter coefficients can be updated according to the principle of constant modulus.
- the blind equalization coefficient update may be a blind equalization coefficient update without decision feedback. It can also be a blind equalization coefficient update with decision feedback.
- the training sequence is targeted to make it as close as possible to the training sequence.
- the filter coefficients of the X-channel filter are updated by the X-channel training sequence, and the filter coefficients of the y-channel filter are trained by the y-channel.
- the sequence is updated.
- the phase restorer 509x can perform phase recovery on the working X-path optical signal according to the preset X-channel training sequence to obtain an X-channel output.
- the optical signal, the phase restorer 509y can perform phase recovery on the working y optical signal according to the preset y-way training sequence to obtain the y-channel output optical signal.
- phase recovery can be:
- the phase restorer 509x estimates the initial phase of the working X-channel optical signal by using the periodic X-channel training sequence, and then uses the phase-locked loop to track the phase change of the working X-path optical signal according to the initial phase of the working X-path optical signal, thereby performing phase recovery. .
- the phase recovery device 509y performs similar phase recovery on the working y optical signal, which is not described here.
- the decoder 51 Ox and the decoder 510y can respectively decode the X-channel output optical signal and the y-channel output optical signal to obtain the original optical signal, and the specific process is not limited herein. .
- the optical signal processing device obtains the first polarization multiplexed optical signal and the second polarization multiplexed optical signal
- the first multiplexed multiplexed optical signal and the second multiplexed multiplexed optical signal are first performed.
- Polarization compensation then the synchronization of the training sequence is performed. Since the polarization compensation separates the optical signals of different paths, when the training sequence is synchronized, it is not affected by the damage of the optical signal, thereby effectively improving the synchronization stability of the optical signal.
- the blind equalization coefficient update may be used, or the training sequence auxiliary coefficient update may be used, thereby improving the flexibility of the solution.
- the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.
- optical signal processing method and device provided by the present invention are described in detail above.
- the idea of the embodiment of the present invention there are changes in the specific implementation manner and application scope. Therefore, the content of the specification should not be construed as limiting the invention.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
一种光信号处理方法及装置，其中，光信号处理方法包括：对接收到的输入光信号进行混频、光电探测、模数转换以及色散补偿后得到第一路偏振复用光信号以及第二路偏振复用光信号；对滤波器系数进行初始化更新流程，并使用初始化更新后的滤波器系数对所述第一路偏振复用光信号以及第二路偏振复用光信号进行偏振补偿得到初始化x路光信号以及初始化y路光信号；采用所述初始化x路光信号以及初始化y路光信号对预置的x路训练序列以及y路训练序列进行同步；若同步结果指示发生了偏振交叉，则对偏振交叉进行纠正。
Description
光信号处理方法及装置
技术领域
本发明实施例涉及信号处理领域， 尤其涉及一种光信号处理方法及装置。 背景技术
为了提高光信号传输效率，现有技术中往往会通过偏振复用利用光信号的 两个正交偏振态，在相同的带宽内同时传输两个独立的光信号，从而将信道传 输效率提高两倍。
3dB左右的光信噪比增益， 并且可以采用电均衡技术， 完全补偿信道中的色散 ( CD , Color Dispersion ) 和极化偏振模色散 ( PMD , Polarization Mode Dispersion )效应。 采用偏振复用结合相干接收技术， 可以实现 100Gb/s 以上 长距离传输。
现有技术中的一种典型的偏振复用相干接收机，具体如图 1所示，将接收 到的光信号通过偏振分束器 101分为 x/y路信号， 并分别送入 90°混频器 103x 和 103y, 通过光电检测器 104, 模数转换器 105 , 得到 N倍采样（N通常为 2 ) 的数字信号 Ix, Qx, Iy, Qy。
Ix, Qx, Iy, Qy分别输入 x/y路色散补偿器 106x和 106y以进行色散补偿， 色散补偿完成后则由同步器 110进行训练序列同步，即同步器 110使用完成色 散补偿的光信号与训练序列作相关得到相关峰值，并根据该相关峰值得到同步 结果，再根据同步结果确定偏振交叉的情况，从而使得偏振补偿器 107调整滤 波器系数。
然后将色散补偿后的光信号输入偏振补偿器 107完成偏振解复用和均衡， 再将训练序列以及均衡后的光信号分别输入相位恢复器 108x和 108y进行相位 恢复， 最后输入解码器 109x和 109y, 恢复得到原始比特流数据。
但是，现有技术进行训练序列同步时，是将色散补偿后的光信号与训练序 列作相关， 得到相关峰值。 此时， 光信号 X路和 y路混在一起， 使得 X路光信 号和 y路光信号各自都有比较大的损伤。如果直接使用 X路光信号与 X路训练 序列作相关，或使用 y路光信号与 y路训练序列作相关，可能会出现峰值不明 显或者有多个峰值的情况， 因此容易导致训练序列同步不准确，从而降低光信
号同步稳定性。
发明内容
本发明实施例提供了一种光信号处理方法及装置，能够有效提高光信号同 步稳定性。
本发明实施例提供的光信号处理方法， 包括：
对接收到的输入光信号进行混频、光电探测、模数转换以及色散补偿后得 到第一路偏振复用光信号以及第二路偏振复用光信号；对滤波器系数进行初始 化更新流程，并使用初始化更新后的滤波器系数对所述第一路偏振复用光信号 以及第二路偏振复用光信号进行偏振补偿得到初始化 X路光信号以及初始化 y 路光信号；采用所述初始化 X路光信号以及初始化 y路光信号对预置的 X路训 练序列以及 y路训练序列进行同步； 若同步结果指示发生了偏振交叉， 则对偏 振交叉进行纠正。
本发明实施例提供的光信号处理装置， 包括：
混频器， 用于对接收到的输入光信号进行混频； 光电探测器， 用于对混频 后的光信号进行光电探测；模数转换器， 用于光电探测后的光信号进行模数转 换； 色散补偿器， 用于对模数转换后的光信号进行色散补偿得到第一路偏振复 用光信号以及第二路偏振复用光信号； 偏振补偿器， 用于对滤波器系数进行初 始化更新流程，并使用初始化更新后的滤波器系数对所述第一路偏振复用光信 号以及第二路偏振复用光信号进行偏振补偿得到初始化 X路光信号以及初始 化 y路光信号； 同步器， 用于采用所述初始化 X路光信号以及初始化 y路光信 号对预置的 X路训练序列以及 y路训练序列进行同步，当同步结果指示发生了 偏振交叉时， 对偏振交叉进行纠正。
本发明实施例具有如下有益效果：
本发明实施例中 ,光信号处理装置得到第一路偏振复用光信号以及第二路 偏振复用光信号之后，会先对第一路偏振复用光信号以及第二路偏振复用光信 号进行偏振补偿， 然后才进行训练序列的同步， 由于偏振补偿会将不同路的光 信号分离开， 所以在进行训练序列同步时， 不会受到光信号损伤的影响， 从而 能够有效提高光信号同步稳定性。
附图说明
图 1为现有技术光信号处理流程示意图；
图 2为本发明光信号处理方法一个实施例示意图；
图 3为本发明光信号处理方法另一实施例示意图；
图 4为本发明光信号处理装置示意图；
图 5为本发明光信号处理流程示意图；
图 6为本发明偏振补偿器示意图。
具体实施方式
本发明实施例提供了一种光信号处理方法及装置，能够有效提高光信号同 步稳定性。
请参阅图 2， 本发明光信号处理方法一个实施例包括：
201、 对接收到的输入光信号进行混频、 光电探测、 模数转换以及色散补 偿后得到第一路偏振复用光信号以及第二路偏振复用光信号；
本实施例， 光信号处理装置可以接收到输入光信号，之后再将输入光信号 以及本地激光器产生的本振光信号进行混频、光电探测、模数转换以及色散补 偿后得到第一路偏振复用光信号以及第二路偏振复用光信号。
其中，混频、光电探测、模数转换以及色散补偿的过程具体此处不作限定。
202、 对滤波器系数进行初始化更新流程， 并使用初始化更新后的滤波器 系数对第一路偏振复用光信号以及第二路偏振复用光信号进行偏振补偿得到 初始化 X路光信号以及初始化 y路光信号；
本实施例中， 光信号处理装置中的偏振补偿器可以采用自适应滤波器实 现， 当得到第一路偏振复用光信号以及第二路偏振复用光信号之后，可以对该 偏振补偿器的滤波器系数进行初始化更新流程，并且使用初始化更新后的滤波 器系数对第一路偏振复用光信号以及第二路偏振复用光信号进行偏振补偿得 到初始化 X路光信号以及初始化 y路光信号。
203、 采用初始化 X路光信号以及初始化 y路光信号对预置的 x路训练序 列以及 y路训练序列进行同步；
当进行偏振补偿得到初始化 X路光信号以及初始化 y路光信号之后，光信 号处理装置可以采用初始化 X路光信号以及初始化 y路光信号对预置的 X路训 练序列以及 y路训练序列进行同步。
需要说明的是，本实施例中， 光信号处理装置中预置有 X路训练序列以及 y路训练序列。
204、 若同步结果指示发生了偏振交叉， 则对偏振交叉进行纠正。
光信号处理装置采用初始化 X路光信号以及初始化 y路光信号对预置的 X 路训练序列以及 y路训练序列进行同步，则可以根据同步结果确定是否发生了 偏振交叉， 若发生了偏振交叉， 则光信号处理装置可以对偏振交叉进行纠正。
本实施例中，光信号处理装置得到第一路偏振复用光信号以及第二路偏振 复用光信号之后，会先对第一路偏振复用光信号以及第二路偏振复用光信号进 行偏振补偿， 然后才进行训练序列的同步， 由于偏振补偿会将不同路的光信号 分离开， 所以在进行训练序列同步时， 不会受到光信号损伤的影响， 从而能够 有效提高光信号同步稳定性。
为便于理解， 下面以一具体实例对本发明光信号处理方法进行伴细描述， 请参阅图 3 , 本发明光信号处理方法另一实施例包括：
301、 对接收到的输入光信号进行混频、 光电探测、 模数转换以及色散补 偿后得到第一路偏振复用光信号以及第二路偏振复用光信号；
本实施例， 光信号处理装置可以接收到输入光信号，之后再将输入光信号 以及本地激光器产生的本振光信号输入两个混频器进行混频处理得到四路混 频信号；
将四路混频信号分别输入四个光电探测器进行光电探测，完成光电探测之 后输出四 4笨测信号；
将四路探测信号分别输入四个模数转换器进行模数转换，完成模数转换后 输出四路数字信号， 分别为 Ix, Qx, Iy, Qy;
将 ix, (¾输入一个色散补偿器进行色散补偿，并输出第一路偏振复用光信 号， 将 Iy, Qy输入另一色散补偿器进行色散补偿， 并输出第二路偏振复用光信 号。
其中，混频、光电探测、模数转换以及色散补偿的过程具体此处不作限定。
302、 对滤波器系数进行初始化更新流程， 并使用初始化更新后的滤波器 系数对第一路偏振复用光信号以及第二路偏振复用光信号进行偏振补偿得到 初始化 X路光信号以及初始化 y路光信号；
本实施例中， 光信号处理装置中的偏振补偿器可以采用自适应滤波器实 现， 当得到第一路偏振复用光信号以及第二路偏振复用光信号之后，可以对该 偏振 卜偿器的滤波器系数进行初始化更新流程。
该初始化更新流程是指初始化状态下的滤波器系数更新， 需要说明的是， 本实施例中的光信号处理装置在刚启动运行时，首先会进入初始化状态进行参 数调试以及偏振交叉的纠正等操作。
滤波器系数更新之后，可以使用初始化更新后的 X路滤波器的滤波器系数 对第一路偏振复用光信号进行偏振补偿得到初始化 X路光信号，使用初始化更 新后的 y路滤波器的滤波器系数对第二路偏振复用光信号进行偏振补偿得到 初始化 y路光信号。
本实施例中的初始化更新流程具体可以采用盲均衡系数更新，具体的更新 方式可以为：
采用恒模算法， 使得偏振补偿器输出的初始化 X路光信号以及初始化 y 路光信号的模保持恒定 ,由于输入的第一路偏振复用光信号以及第二路偏振复 用光信号会动态的变化， 所以可以按照恒模的原则对滤波器系数进行更新。
需要说明的是， 该盲均衡系数更新可以是无判决反馈的盲均衡系数更新。
303、 采用初始化 X路光信号以及初始化 y路光信号对预置的 X路训练序 列以及 y路训练序列进行同步；
当进行偏振补偿得到初始化 X路光信号以及初始化 y路光信号之后，光信 号处理装置可以采用初始化 X路光信号以及初始化 y路光信号对预置的 X路训 练序列以及 y路训练序列进行同步。
需要说明的是，本实施例中， 光信号处理装置中预置有 X路训练序列以及 y路训练序列。
具体的同步过程可以为：
将初始化 X路光信号与 X路训练序列作相关得到第一相关峰值，将初始化 y路光信号与 y路训练序列作相关得到第二相关峰值， 将初始化 X路光信号与 y路训练序列作相关得到第三相关峰值， 将初始化 y路光信号与 X路训练序列 作相关得到第四相关峰值。
304、 若同步结果指示发生了偏振交叉， 则对偏振交叉进行纠正；
本实施例中，若第一相关峰值以及第二相关峰值均大于或等于预置的门限 值，且第三相关峰值以及第四相关峰值均小于预置的门限值， 则确定未发生偏 振交叉；
若第三相关峰值以及第四相关峰值均大于或等于预置的门 P艮值 ,且第一相 关峰值以及第二相关峰值均小于预置的门限值， 则确定发生了偏振交叉。
当光信号处理装置确定发生了偏振交叉时，可以交换偏振补偿器中 X路滤 波器的滤波器系数以及 y路滤波器的滤波器系数，也就是将 X路滤波器的滤波 器系数以及 y路滤波器的滤波器系数进行对换， 滤波器系数对换之后， 则可以 使得 X路滤波器输出初始化 X路光信号， y路滤波器输出初始化 y路光信号， 从而纠正了偏振交叉。
需要说明的是， 若同步结果指示未发生偏振交叉， 则可以直接执行步骤
305。
305、 对滤波器系数进行工作更新流程， 并使用工作更新后的滤波器系数 对新的第一路偏振复用光信号以及第二路偏振复用光信号进行偏振补偿得到 工作 X路光信号以及工作 y路光信号；
本实施例中，当光信号处理装置完成了参数调试以及偏振交叉的纠正等操 作之后，可以切换至工作状态， 则光信号处理装置对新接收到的输入光信号同 样执行混频、 光电探测、模数转换以及色散补偿等处理， 得到新的第一路偏振 复用光信号以及第二路偏振复用光信号。
光信号处理装置在工作状态下可以对偏振补偿器的滤波器系数进行工作 更新流程。
本实施例中的工作更新流程具体可以采用盲均衡系数更新，具体的更新方 式可以为：
采用恒模算法，使得偏振补偿器输出的工作 X路光信号以及工作 y路光信 号的模保持恒定，由于新输入的第一路偏振复用光信号以及第二路偏振复用光 信号会动态的变化， 所以可以按照恒模的原则对滤波器系数进行更新。
需要说明的是， 该盲均衡系数更新可以是无判决反馈的盲均衡系数更新， 也可以是带判决反馈的盲均衡系数更新。
可以理解的是， 在实际应用中， 除了采用盲均衡系数更新之外， 还可以采
用其他的方式进行工作更新流程， 例如采用训练序列辅助系数更新，具体的更 新方式可以为：
光信号处理装置进行滤波器更新时以训练序列为目标，使之尽量逼近训练 序列， X路滤波器的滤波器系数用 X路训练序列进行更新， y路滤波器的滤波 器系数用 y路训练序列进行更新。
306、 根据预置的 X路训练序列对工作 X路光信号进行相位恢复得到 X路 输出光信号，并根据预置的 y路训练序列对工作 y路光信号进行相位恢复得到 y路输出光信号；
本实施例中 ,光信号处理装置在得到工作 X路光信号以及工作 y路光信号 之后， 可以根据预置的 X路训练序列对工作 X路光信号进行相位恢复得到 X 路输出光信号，并根据预置的 y路训练序列对工作 y路光信号进行相位恢复得 到 y路输出光信号。
具体进行相位恢复的方式可以为：
光信号处理装置利用周期性的 X路训练序列估计工作 X路光信号初始相 位， 然后按照该工作 X路光信号初始相位， 利用锁相环跟踪工作 X路光信号的 相位变化， 从而进行相位恢复。
对工作 y路光信号进行相位恢复的方式类似， 具体此处不再赘述。
307、 对 X路输出光信号以及 y路输出光信号分别进行解码。
光信号处理装置得到 X路输出光信号以及 y路输出光信号之后，可以分别 对 X路输出光信号以及 y路输出光信号分别进行解码得到原始光信号，具体过 程此处不作限定。
本实施例中，光信号处理装置得到第一路偏振复用光信号以及第二路偏振 复用光信号之后，会先对第一路偏振复用光信号以及第二路偏振复用光信号进 行偏振补偿， 然后才进行训练序列的同步， 由于偏振补偿会将不同路的光信号 分离开， 所以在进行训练序列同步时， 不会受到光信号损伤的影响， 从而能够 有效提高光信号同步稳定性；
本实施例中， 光信号处理装置在对滤波器系数进行更新时，可以采用盲均 衡系数更新， 也可以采用训练序列辅助系数更新， 从而提高了方案灵活性。
上面对本发明光信号处理方法进行了描述，下面描述本发明光信号处理装
置， 请参阅图 4, 本发明光信号处理装置一个实施例包括：
混频器 403 , 用于对接收到的输入光信号进行混频；
光电探测器 404, 用于对混频后的光信号进行光电探测；
模数转换器 405， 用于光电探测后的光信号进行模数转换；
色散补偿器 406， 用于对模数转换后的光信号进行色散补偿得到第一路偏 振复用光信号以及第二路偏振复用光信号；
偏振补偿器 407, 用于对滤波器系数进行初始化更新流程， 并使用初始化 更新后的滤波器系数对第一路偏振复用光信号以及第二路偏振复用光信号进 行偏振补偿得到初始化 X路光信号以及初始化 y路光信号；
同步器 408， 用于采用初始化 X路光信号以及初始化 y路光信号对预置的
X路训练序列以及 y路训练序列进行同步，当同步结果指示发生了偏振交叉时 , 对偏振交叉进行纠正。
本实施例中的光信号处理装置还可以进一步包括：
本地激光器 401 , 用于产生本振光信号；
偏振分束器 402， 用于对本振光信号以及输入光信号进行分束输入混频器
403。
本实施例中的偏振补偿器 407 还可以进一步用于对滤波器系数进行工作 更新流程，并使用工作更新后的滤波器系数对新的第一路偏振复用光信号以及 第二路偏振复用光信号进行偏振补偿得到工作 X路光信号以及工作 y路光信 号；
基于上述偏振补偿器 407所执行的进一步功能，本实施例中的光信号处理 装置还可以进一步包括：
相位恢复器 409， 用于根据预置的 X路训练序列对工作 X路光信号进行相 位恢复得到 X路输出光信号，并根据预置的 y路训练序列对工作 y路光信号进 行相位恢复得到 y路输出光信号；
解码器 410， 用于对 X路输出光信号以及 y路输出光信号分别进行解码。 为便于理解，下面以一个具体的应用场景对本发明光信号处理装置各器件 间的交互进行伴细描述， 请参阅图 5:
当接收到输入光信号时， 将该输入光信号通过偏振分束器 502分为 x/y路
信号， 分别送入 90°混频器 503x和 503y, 同时， 通过本地激光器 501产生本 振光信号， 将该本振光信号同样通过偏振分束器 502分为 x/y路信号， 并分别 送入 90。混频器 503x和 503y， 90。混频器 503x和 503y分别输出两路混频信号； 将四路混频信号分别输入四个光电探测器 504进行光电探测，完成光电探 测之后输出四 笨测信号；
将四路探测信号分别输入四个模数转换器 505进行模数转换，完成模数转 换后输出四路数字信号， 分别为 Ix, Qx, Iy, Qy;
将 Ix, (¾输入色散补偿器 506x进行色散补偿， 并输出第一路偏振复用光 信号， 将 Iy, Qy输入色散补偿器 506y进行色散补偿， 并输出第二路偏振复用 光信号。
对偏振补偿器 507中的自适应滤波器的滤波器系数进行初始化更新流程， 该初始化更新流程是指初始化状态下的滤波器系数更新， 需要说明的是，本实 施例中的光信号处理装置在刚启动运行时 ,首先会进入初始化状态进行参数调 试以及偏振交叉的纠正等操作。
初始化更新流程具体可以采用盲均衡系数更新， 具体的更新方式可以为： 采用恒模算法， 使得偏振补偿器输出的初始化 X路光信号以及初始化 y 路光信号的模保持恒定 ,由于输入的第一路偏振复用光信号以及第二路偏振复 用光信号会动态的变化， 所以可以按照恒模的原则对滤波器系数进行更新。
需要说明的是， 该盲均衡系数更新可以是无判决反馈的盲均衡系数更新。 完成滤波器系数更新之后，可以将得到的第一路偏振复用光信号以及第二 路偏振复用光信号同时输入偏振补偿器 507进行偏振补偿。
本实施例中的偏振补偿器 507具体的结构可以如图 6所示， 其中， Wxx,
Wyx, WXy, Wyy分别为自适应滤波器的滤波器系数， 其中， 和 Wyx为 X路 滤波器的滤波器系数， WXy和 Wyy为 y路滤波器的滤波器系数。
当偏振补偿器 507对第一路偏振复用光信号以及第二路偏振复用光信号 进行偏振补偿之后得到初始化 X路光信号以及初始化 y路光信号， 同步器 508 可以采用初始化 X路光信号以及初始化 y路光信号对预置的 X路训练序列以及 y路训练序列进行同步；
需要说明的是，本实施例中， 光信号处理装置中预置有 X路训练序列以及
y路训练序列。
同步器 508具体的同步过程可以为：
将初始化 X路光信号与 X路训练序列作相关得到第一相关峰值，将初始化 y路光信号与 y路训练序列作相关得到第二相关峰值， 将初始化 X路光信号与 y路训练序列作相关得到第三相关峰值， 将初始化 y路光信号与 X路训练序列 作相关得到第四相关峰值。
本实施例中 ,若第一相关峰值以及第二相关峰值均大于或等于预置的门限 值，且第三相关峰值以及第四相关峰值均小于预置的门限值， 则确定未发生偏 振交叉；
若第三相关峰值以及第四相关峰值均大于或等于预置的门限值，且第一相 关峰值以及第二相关峰值均小于预置的门限值， 则确定发生了偏振交叉。
当确定发生了偏振交叉时，则偏振补偿器 507可以交换 X路滤波器的滤波 器系数以及 y路滤波器的滤波器系数， 也就是将 W 和 Wxy交换， 将 和 Wyy交换， 则可以使得 X路滤波器输出初始化 X路光信号， y路滤波器输出初 始化 y路光信号， 从而纠正了偏振交叉。
需要说明的是，若同步结果指示未发生偏振交叉，或纠正了偏正交叉之后 , 则光信号处理装置可以从初始化状态进入工作状态。
在工作状态中， 本地激光器 501、 偏振分束器 502、 90。混频器 503x、 90。 混频器 503y、 光电探测器 504、 模数转换器 505、 色散补偿器 506x以及色散 补偿器 506y所执行的操作均与前述光信号处理装置处于初始化状态时的处理 方式相同， 具体此处不再赘述。
光信号处理装置在工作状态下可以对偏振补偿器 507 的滤波器系数进行 工作更新流程。
本实施例中的工作更新流程具体可以采用盲均衡系数更新 ,具体的更新方 式可以为：
采用恒模算法， 使得偏振补偿器 507输出的工作 X路光信号以及工作 y 路光信号的模保持恒定，由于新输入的第一路偏振复用光信号以及第二路偏振 复用光信号会动态的变化， 所以可以按照恒模的原则对滤波器系数进行更新。
需要说明的是， 该盲均衡系数更新可以是无判决反馈的盲均衡系数更新，
也可以是带判决反馈的盲均衡系数更新。
可以理解的是， 在实际应用中， 除了采用盲均衡系数更新之外， 还可以采 用其他的方式进行工作更新流程， 例如采用训练序列辅助系数更新，具体的更 新方式可以为：
光信号处理装置进行滤波器更新时以训练序列为目标，使之尽量逼近训练 序列， X路滤波器的滤波器系数用 X路训练序列进行更新， y路滤波器的滤波 器系数用 y路训练序列进行更新。
本实施例中 ,偏振补偿器 507在得到工作 X路光信号以及工作 y路光信号 之后， 相位恢复器 509x可以根据预置的 X路训练序列对工作 X路光信号进行 相位恢复得到 X路输出光信号， 相位恢复器 509y可以根据预置的 y路训练序 列对工作 y路光信号进行相位恢复得到 y路输出光信号。
具体进行相位恢复的方式可以为：
相位恢复器 509x利用周期性的 X路训练序列估计工作 X路光信号初始相 位， 然后按照该工作 X路光信号初始相位， 利用锁相环跟踪工作 X路光信号的 相位变化， 从而进行相位恢复。
相位恢复器 509y对工作 y路光信号进行相位恢复的方式类似， 具体此处 不再赘述。
得到 X路输出光信号以及 y路输出光信号之后，解码器 51 Ox和解码器 510y 可以分别对 X路输出光信号以及 y路输出光信号分别进行解码得到原始光信 号， 具体过程此处不作限定。
本实施例中，光信号处理装置得到第一路偏振复用光信号以及第二路偏振 复用光信号之后，会先对第一路偏振复用光信号以及第二路偏振复用光信号进 行偏振补偿， 然后才进行训练序列的同步， 由于偏振补偿会将不同路的光信号 分离开， 所以在进行训练序列同步时， 不会受到光信号损伤的影响， 从而能够 有效提高光信号同步稳定性；
本实施例中， 光信号处理装置在对滤波器系数进行更新时，可以采用盲均 衡系数更新， 也可以采用训练序列辅助系数更新， 从而提高了方案灵活性。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件完成，该程序可以存储于一种计算机可读存
储介质中， 上述提到的存储介质可以是只读存储器， 磁盘或光盘等。
以上对本发明所提供的一种光信号处理方法以及装置进行了详细介绍 ,对 于本领域的一般技术人员，依据本发明实施例的思想，在具体实施方式及应用 范围上均会有改变之处， 因此， 本说明书内容不应理解为对本发明的限制。
Claims
1、 一种光信号处理方法， 其特征在于， 包括：
对接收到的输入光信号进行混频、光电探测、模数转换以及色散补偿后得 到第一路偏振复用光信号以及第二路偏振复用光信号；
对滤波器系数进行初始化更新流程，并使用初始化更新后的滤波器系数对 所述第一路偏振复用光信号以及第二路偏振复用光信号进行偏振补偿得到初 始化 X路光信号以及初始化 y路光信号；
采用所述初始化 X路光信号以及初始化 y路光信号对预置的 X路训练序列 以及 y路训练序列进行同步；
若同步结果指示发生了偏振交叉， 则对偏振交叉进行纠正。
2、 根据权利要求 1所述的方法， 其特征在于， 若同步结果指示未发生偏 振交叉， 或对偏振交叉进行纠正后， 所述方法还包括：
对滤波器系数进行工作更新流程，并使用工作更新后的滤波器系数对新的 第一路偏振复用光信号以及第二路偏振复用光信号进行偏振补偿得到工作 X 路光信号以及工作 y路光信号；
根据预置的 X路训练序列对所述工作 X路光信号进行相位恢复得到 X路输 出光信号，并根据预置的 y路训练序列对所述工作 y路光信号进行相位恢复得 到 y路输出光信号；
对所述 X路输出光信号以及 y路输出光信号分别进行解码。
3、 根据权利要求 1或 2所述的方法， 其特征在于， 所述采用所述初始化
X路光信号以及初始化 y路光信号对预置的 X路训练序列以及 y路训练序列进 行同步包括：
将所述初始化 X路光信号与 X路训练序列作相关得到第一相关峰值，将所 述初始化 y路光信号与 y路训练序列作相关得到第二相关峰值，将所述初始化 X路光信号与 y路训练序列作相关得到第三相关峰值， 将所述初始化 y路光信 号与 X路训练序列作相关得到第四相关峰值。
4、 根据权利要求 3所述的方法， 其特征在于， 所述方法还包括： 若所述第一相关峰值以及第二相关峰值均大于或等于预置的门 P艮值，且所 述第三相关峰值以及第四相关峰值均小于预置的门限值，则确定未发生偏振交 叉；
若所述第三相关峰值以及第四相关峰值均大于或等于预置的门 P艮值 ,且所 述第一相关峰值以及第二相关峰值均小于预置的门限值，则确定发生了偏振交 叉。
5、 根据权利要求 1或 2所述的方法， 其特征在于， 所述对滤波器系数进 行初始化更新流程包括：
对偏振 卜偿器中的 X路滤波器的滤波器系数以及 y路滤波器的滤波器系数 进行盲均衡系数更新。
6、 根据权利要求 5所述的方法， 其特征在于， 所述使用初始化更新后的 滤波器系数对所述第一路偏振复用光信号以及第二路偏振复用光信号进行偏 振补偿得到初始化 X路光信号以及初始化 y路光信号包括：
使用初始化更新后的 X路滤波器的滤波器系数对所述第一路偏振复用光 信号进行偏振补偿得到所述初始化 X路光信号，使用初始化更新后的 y路滤波 器的滤波器系数对所述第二路偏振复用光信号进行偏振补偿得到所述初始化 y路光信号。
7、 根据权利要求 5所述的方法， 其特征在于， 所述对偏振交叉进行纠正 包括：
交换所述 X路滤波器的滤波器系数以及所述 y路滤波器的滤波器系数。
8、 根据权利要求 2所述的方法， 其特征在于， 所述对滤波器系数进行工 作更新流程包括：
对偏振 卜偿器中的 X路滤波器的滤波器系数以及 y路滤波器的滤波器系数 进行盲均衡系数更新；
或，
对偏振补偿器中的 X路滤波器的滤波器系数以及 y路滤波器的滤波器系数 进行训练序列辅助系数更新。
9、 一种光信号处理装置， 其特征在于， 包括：
混频器， 用于对接收到的输入光信号进行混频；
光电探测器， 用于对混频后的光信号进行光电探测；
模数转换器， 用于光电探测后的光信号进行模数转换； 色散补偿器，用于对模数转换后的光信号进行色散补偿得到第一路偏振复 用光信号以及第二路偏振复用光信号；
偏振补偿器， 用于对滤波器系数进行初始化更新流程， 并使用初始化更新 后的滤波器系数对所述第一路偏振复用光信号以及第二路偏振复用光信号进 行偏振补偿得到初始化 X路光信号以及初始化 y路光信号；
同步器，用于采用所述初始化 X路光信号以及初始化 y路光信号对预置的 X路训练序列以及 y路训练序列进行同步，当同步结果指示发生了偏振交叉时 , 对偏振交叉进行纠正。
10、 根据权利要求 9所述的光信号处理装置， 其特征在于，
所述偏振补偿器还用于对滤波器系数进行工作更新流程，并使用工作更新 后的滤波器系数对新的第一路偏振复用光信号以及第二路偏振复用光信号进 行偏振补偿得到工作 X路光信号以及工作 y路光信号；
所述光信号处理装置还包括：
相位恢复器，用于根据预置的 X路训练序列对所述工作 X路光信号进行相 位恢复得到 X路输出光信号，并根据预置的 y路训练序列对所述工作 y路光信 号进行相位恢复得到 y路输出光信号；
解码器， 用于对所述 X路输出光信号以及 y路输出光信号分别进行解码。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/074979 WO2011157128A2 (zh) | 2011-05-31 | 2011-05-31 | 光信号处理方法及装置 |
| EP11795094.9A EP2685642B1 (en) | 2011-05-31 | 2011-05-31 | Method and device for processing optical signals |
| CN201180000521.1A CN102204133B (zh) | 2011-05-31 | 2011-05-31 | 光信号处理方法及装置 |
| ES11795094.9T ES2605306T3 (es) | 2011-05-31 | 2011-05-31 | Método y dispositivo para procesar señales ópticas |
| US13/664,134 US8995831B2 (en) | 2011-05-31 | 2012-10-30 | Method and apparatus for processing optical signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/074979 WO2011157128A2 (zh) | 2011-05-31 | 2011-05-31 | 光信号处理方法及装置 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US13/664,134 Continuation US8995831B2 (en) | 2011-05-31 | 2012-10-30 | Method and apparatus for processing optical signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2011157128A2 true WO2011157128A2 (zh) | 2011-12-22 |
| WO2011157128A3 WO2011157128A3 (zh) | 2012-04-05 |
Family
ID=44662798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2011/074979 WO2011157128A2 (zh) | 2011-05-31 | 2011-05-31 | 光信号处理方法及装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8995831B2 (zh) |
| EP (1) | EP2685642B1 (zh) |
| CN (1) | CN102204133B (zh) |
| ES (1) | ES2605306T3 (zh) |
| WO (1) | WO2011157128A2 (zh) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2434665B1 (en) * | 2009-05-18 | 2017-03-08 | Nippon Telegraph And Telephone Corporation | Signal generation circuit, optical signal transmitter, signal reception circuit, optical signal synchronization establishment method, and optical signal synchronization system |
| CN102204133B (zh) * | 2011-05-31 | 2014-02-26 | 华为技术有限公司 | 光信号处理方法及装置 |
| EP2608436B1 (en) * | 2011-07-26 | 2019-05-01 | Huawei Technologies Co., Ltd. | Method and device for receiving multi-carrier optical signals |
| US9413456B2 (en) * | 2012-07-20 | 2016-08-09 | The Boeing Company | Non-linear optical receiver |
| US8861960B2 (en) * | 2012-08-20 | 2014-10-14 | Ciena Corporation | Systems and methods for the compensation of nonlinear cross polarization and cross phase modulation in dual polarization coherent channels |
| JP6023671B2 (ja) * | 2013-07-29 | 2016-11-09 | 日本電信電話株式会社 | クロストーク補償装置、及び、クロストーク補償方法 |
| US10129054B2 (en) | 2017-02-10 | 2018-11-13 | Futurewei Technologies, Inc. | Training sequences with enhanced IQ imbalance tolerances for training-aided frequency domain equalization |
| CN108123908B (zh) * | 2017-12-14 | 2020-10-27 | 杭州电子科技大学 | 一种用于ng-pon的改进svm均衡方法及系统 |
| CN110149284B (zh) * | 2018-02-12 | 2022-08-26 | 华为技术有限公司 | 一种信道损伤估计方法与装置 |
| US10651947B2 (en) * | 2018-02-20 | 2020-05-12 | Futurewei Technologies, Inc. | Coherent detection with remotely delivered local oscillators |
| US10509167B2 (en) * | 2018-04-23 | 2019-12-17 | Hewlett Packard Enterprise Development Lp | Optical phase difference calculation using analog processing |
| CN110224761B (zh) * | 2019-05-30 | 2020-08-04 | 武汉邮电科学研究院有限公司 | 一种快速求解偏振旋转矩阵和均衡器系数的方法及系统 |
Family Cites Families (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999028723A1 (fr) * | 1997-11-28 | 1999-06-10 | Fujitsu Limited | Procede de mesure de la dispersion en mode de polarisation, dispositif de commande de compensation de dispersion et procede de commande de compensation de dispersion |
| DE19936254A1 (de) * | 1999-07-31 | 2001-02-01 | Alcatel Sa | Filter zur Bestimmung der Kreuzkorrelation, Empfänger und Methode zur Entzerrung von Signalen |
| DE10243141B4 (de) * | 2002-09-17 | 2006-05-11 | Siemens Ag | Verfahren zur Übertragung von optischen Polarisationsmultiplexsignalen |
| JP4053389B2 (ja) * | 2002-09-19 | 2008-02-27 | 富士通株式会社 | 光信号対雑音比のモニタ方法およびそれを用いた光伝送システム |
| US6947549B2 (en) * | 2003-02-19 | 2005-09-20 | The Hong Kong Polytechnic University | Echo canceller |
| EP1508983B1 (en) * | 2003-08-18 | 2005-12-14 | Alcatel | Optical transmission method and optical receiver |
| CN1902540A (zh) * | 2003-11-17 | 2007-01-24 | 财团法人大阪产业振兴机构 | 光信号处理方法和装置 |
| CN1295894C (zh) * | 2003-11-18 | 2007-01-17 | 北京邮电大学 | 自适应偏振模色散补偿中的反馈控制模块 |
| US7315575B2 (en) * | 2004-03-08 | 2008-01-01 | Nortel Networks Limited | Equalization strategy for dual-polarization optical transport system |
| US20060007197A1 (en) * | 2004-06-29 | 2006-01-12 | Gilbert John D | Apparatus and method for light signal processing utilizing independent timing signal |
| US7522841B2 (en) * | 2005-10-21 | 2009-04-21 | Nortel Networks Limited | Efficient data transmission and training of data processing functions |
| US7606498B1 (en) * | 2005-10-21 | 2009-10-20 | Nortel Networks Limited | Carrier recovery in a coherent optical receiver |
| US7555227B2 (en) * | 2005-10-21 | 2009-06-30 | Nortel Networks Limited | Polarization compensation in a coherent optical receiver |
| CN1790948A (zh) * | 2005-12-08 | 2006-06-21 | 上海交通大学 | 同步光传输系统中光信噪比监测的方法 |
| US8078065B2 (en) * | 2006-12-22 | 2011-12-13 | Alcatel Lucent | Polarization tracking and signal equalization for optical receivers configured for on-off keying or pulse amplitude modulation signaling |
| JP5003391B2 (ja) * | 2007-10-01 | 2012-08-15 | 富士通株式会社 | 光伝送システムおよび光伝送方法 |
| US8005368B2 (en) * | 2007-12-05 | 2011-08-23 | Ciena Corporation | Signal equalizer in a coherent optical receiver |
| US7701842B2 (en) * | 2008-02-13 | 2010-04-20 | Nortel Networks Limited | Low conversion rate digital dispersion compensation |
| JP5181770B2 (ja) * | 2008-03-27 | 2013-04-10 | 富士通株式会社 | 光伝送システム |
| CN101552640B (zh) * | 2008-04-01 | 2012-04-11 | 富士通株式会社 | 滤波器系数变更装置和方法 |
| CN101599801B (zh) * | 2008-06-06 | 2012-02-22 | 富士通株式会社 | 滤波器系数调整装置和方法 |
| US8260156B2 (en) * | 2008-10-28 | 2012-09-04 | Nec Laboratories America, Inc. | Adaptive crossing frequency domain equalization (FDE) in digital PolMux coherent systems |
| JP5141498B2 (ja) * | 2008-10-30 | 2013-02-13 | 富士通株式会社 | 光送受信システム，光送信器，光受信器および光送受信方法 |
| US8184993B2 (en) * | 2009-02-25 | 2012-05-22 | Nec Laboratories America, Inc. | Polarization mode dispersion (PMD) compensation in polarization multiplexed coded orthogonal frequency division multiplexing (OFDM) systems |
| EP2436132B1 (en) * | 2009-05-28 | 2013-07-10 | Nokia Siemens Networks GmbH & Co. KG | Method and arrangement for blind demultiplexing a polarisation diversity multiplex signal |
| US8655191B2 (en) * | 2009-06-29 | 2014-02-18 | Alcatel Lucent | Symbol timing recovery in polarization division multiplexed coherent optical transmission system |
| KR20110005575A (ko) * | 2009-07-10 | 2011-01-18 | 한국전자통신연구원 | 코히어런트 광 수신기의 디지털 등화 장치 및 방법 |
| US8340534B2 (en) * | 2009-08-07 | 2012-12-25 | Futurewei Technologies, Inc. | Side band pilot tone for digital signal processing in polarization multiplexed coherent optical communication system |
| US8718491B2 (en) * | 2009-10-29 | 2014-05-06 | Ciena Corporation | Soft decoding of data in a coherent optical receiver |
| US9100126B2 (en) * | 2009-11-24 | 2015-08-04 | Nec Corporation | Optical reception device and optical reception control method |
| JP5350284B2 (ja) * | 2010-01-28 | 2013-11-27 | 株式会社日立製作所 | 光送受信システム及び光受信機 |
| US8538278B2 (en) * | 2010-02-09 | 2013-09-17 | NEC Laboratorie America, Inc | Superimposed training and digital filtering coherent optical receivers |
| CN102209055B (zh) * | 2010-03-30 | 2014-10-01 | 富士通株式会社 | 用于相移键控信号的自适应盲均衡方法、均衡器及接收机 |
| JP5549333B2 (ja) * | 2010-04-07 | 2014-07-16 | 富士通株式会社 | 偏波変動補償装置および光通信システム |
| US8472813B2 (en) * | 2010-06-18 | 2013-06-25 | Nec Laboratories America, Inc. | Computationally-efficient MIMO equalization algorithm for high-speed, real-time, adaptive polarization multiplexed (POLMUX) OFDM transmission with direct detection |
| US8744275B2 (en) * | 2011-03-05 | 2014-06-03 | LGS Innovations LLC | System, method, and apparatus for high-sensitivity optical detection |
| US8615171B2 (en) * | 2011-03-31 | 2013-12-24 | Nec Laboratories America, Inc. | Computationally-efficient equalization in polmux OFDM transmission with direct detection via joint transmitter and receiver processing |
| CN102204133B (zh) * | 2011-05-31 | 2014-02-26 | 华为技术有限公司 | 光信号处理方法及装置 |
-
2011
- 2011-05-31 CN CN201180000521.1A patent/CN102204133B/zh active Active
- 2011-05-31 EP EP11795094.9A patent/EP2685642B1/en active Active
- 2011-05-31 WO PCT/CN2011/074979 patent/WO2011157128A2/zh active Application Filing
- 2011-05-31 ES ES11795094.9T patent/ES2605306T3/es active Active
-
2012
- 2012-10-30 US US13/664,134 patent/US8995831B2/en active Active
Non-Patent Citations (2)
| Title |
|---|
| None |
| See also references of EP2685642A4 |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011157128A3 (zh) | 2012-04-05 |
| CN102204133A (zh) | 2011-09-28 |
| US8995831B2 (en) | 2015-03-31 |
| US20130058649A1 (en) | 2013-03-07 |
| ES2605306T3 (es) | 2017-03-13 |
| CN102204133B (zh) | 2014-02-26 |
| EP2685642A4 (en) | 2014-09-03 |
| EP2685642A2 (en) | 2014-01-15 |
| EP2685642B1 (en) | 2016-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2011157128A2 (zh) | 光信号处理方法及装置 | |
| US9686020B2 (en) | Signal processing device and signal processing method | |
| JP4944953B2 (ja) | コヒーレントな偏波多重化光信号を受け取るためのシステムおよび方法 | |
| US9413522B2 (en) | Optical receiver and signal processing method for optical receiver | |
| US7873286B2 (en) | Optical receiver systems and methods for polarization demultiplexing, PMD compensation, and DXPSK demodulation | |
| US8478135B2 (en) | Method and apparatus for polarization-division-multiplexed optical receivers | |
| US7509054B2 (en) | Method for the transmission of optical polarization multiplex signals | |
| US20120148265A1 (en) | Coherent optical receiving device capable of digital equalization of optical input, digital equalization method for optical input and coherent optical transmitting/receiving device | |
| KR20110005575A (ko) | 코히어런트 광 수신기의 디지털 등화 장치 및 방법 | |
| US10868631B2 (en) | Construction method of mode-division multiplexing fiber-optic communication system and a constructed fiber-optic communication system | |
| US8805208B2 (en) | System and method for polarization de-multiplexing in a coherent optical receiver | |
| JP2011188044A (ja) | 光伝送システム | |
| US8699889B2 (en) | Polarization demultiplexing using independent component analysis | |
| US8903255B2 (en) | Polarization-multiplexed signal receiver, polarization multiplexing system and polarization-multiplexed signal receiving method | |
| JP2009253972A (ja) | フィルタ係数変更装置および方法 | |
| JPWO2012118215A1 (ja) | 光受信器、偏波分離装置、および光受信方法 | |
| WO2012103832A2 (zh) | 信号处理方法、光接收机以及光网络系统 | |
| US20090274460A1 (en) | Differential delay receiver using cross-polarization interferometer for polmux-dpsk system | |
| WO2018180912A1 (ja) | 信号処理装置、及び信号処理方法 | |
| KR101931957B1 (ko) | 편광 다중 광전송을 위한 시편광 코딩을 이용한 광 전송 방법 및 시스템 | |
| JP6131831B2 (ja) | 光受信器および光受信方法 | |
| WO2012144108A1 (ja) | 光受信方法および光受信機 | |
| WO2012106882A1 (zh) | 去延时方法、装置和光通信系统接收器 | |
| JP2014154926A (ja) | 受信信号処理装置および受信信号処理方法 | |
| KR101314844B1 (ko) | 코히어런트 광 수신기의 디지털 신호 동기화 장치 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 201180000521.1 Country of ref document: CN |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11795094 Country of ref document: EP Kind code of ref document: A2 |
|
| REEP | Request for entry into the european phase |
Ref document number: 2011795094 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2011795094 Country of ref document: EP |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |