WO2012009902A1 - 电域色散补偿的方法和滤波器参数调整器 - Google Patents
电域色散补偿的方法和滤波器参数调整器 Download PDFInfo
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- WO2012009902A1 WO2012009902A1 PCT/CN2010/078630 CN2010078630W WO2012009902A1 WO 2012009902 A1 WO2012009902 A1 WO 2012009902A1 CN 2010078630 W CN2010078630 W CN 2010078630W WO 2012009902 A1 WO2012009902 A1 WO 2012009902A1
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- dispersion
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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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/697—Arrangements for reducing noise and distortion
- H04B10/6971—Arrangements for reducing noise and distortion using equalisation
Definitions
- a typical electric domain dispersion compensator is composed of a dispersion compensation filter 10, an adaptive filter 20, a dispersion feedback unit 40, and a filter parameter adjuster 30.
- the filter parameter adjuster 30 stores a lookup table of the dispersion and the corresponding filter parameters.
- the adaptive filter 20 compensates for the residual dispersion and the polarization mode dispersion, and the dispersion feedback
- the device 40 can obtain the dispersion feedback information by analyzing the signal, and the dispersion feedback information is closely related to the dispersion compensation effect of the signal. By analyzing the dispersion feedback information, it can be judged whether the dispersion compensation is appropriate.
- the dispersion of the protection path and the dispersion of the working path are likely to be different. Therefore, the phase receiving system needs to re-adjust the parameters of the dispersion compensation filter 10 to correctly restore the service, and the parameter adjustment process needs to be judged according to the dispersion feedback information.
- a primary object of the present invention is to provide a method of electrical domain dispersion compensation and a filter parameter adjuster for implementing fast protection switching.
- the invention provides a method for compensating for electric field dispersion, which is applied to a phase receiving system, comprising the steps of: presetting a dispersion compensation value or a dispersion compensation list of a protection path of the phase receiving system; when it is necessary to adjust the protection path
- the dispersion compensation parameter required to adjust the dispersion of the protection path is configured according to the preset dispersion compensation value or the dispersion compensation list.
- the protection path dispersion compensation value or the dispersion compensation list of the preset phase receiving system comprises: When the phase receiving system is initialized, determining a dispersion state of the protection path; and setting a dispersion compensation value or a dispersion compensation list of the protection path according to a dispersion state of the protection path.
- the dispersing compensation value or the dispersion compensation list of the protection path according to the dispersion condition of the protection path includes: setting a dispersion compensation value corresponding to the protection path when the dispersion of the protection path is known.
- the dispersing compensation value or the dispersion compensation list of the protection path is set according to a dispersion condition of the protection path, and: when the dispersion of the protection path is unknown, setting a dispersion compensation list according to a dispersion probability size of the protection path .
- the method before the adjusting the dispersion compensation parameter of the protection path according to the preset dispersion compensation value or the dispersion compensation list configuration, the method further includes: determining, according to the dispersion feedback information, whether the need is needed Adjusting the dispersion of the protection path.
- the invention also provides a filter parameter adjuster, which is applied to a phase receiving system, and includes: a preset module, configured to preset a dispersion compensation value or a dispersion compensation list of a protection path of the phase receiving system; a compensation module, And configured to adjust a dispersion compensation parameter required for the protection path dispersion according to the preset dispersion compensation value or the dispersion compensation list configuration when the dispersion of the protection path needs to be adjusted.
- a filter parameter adjuster which is applied to a phase receiving system, and includes: a preset module, configured to preset a dispersion compensation value or a dispersion compensation list of a protection path of the phase receiving system; a compensation module, And configured to adjust a dispersion compensation parameter required for the protection path dispersion according to the preset dispersion compensation value or the dispersion compensation list configuration when the dispersion of the protection path needs to be adjusted.
- the preset module includes: a determining unit, configured to determine a dispersion state of the protection path when the phase receiving system is initialized; and an initializing unit, configured to set a dispersion of the protection path according to a dispersion state of the protection path Compensation value or dispersion compensation list.
- the initializing unit is configured to set a dispersion compensation value corresponding to the protection path when the dispersion of the protection path is known.
- the initializing unit is configured to set the dispersion compensation list in order of the dispersion probability of the protection path when the dispersion of the protection path is unknown.
- the method further includes a determining module, configured to determine, according to the dispersion feedback information, whether the chromatic dispersion of the protection path needs to be adjusted.
- the electric field dispersion compensation method and the filter parameter adjuster proposed by the invention perform dispersion compensation according to a dispersion compensation value or a dispersion compensation list of a preset protection path when the protection switching occurs, and adjust the dispersion of the protection path in a short time. , to achieve fast protection switching.
- a schematic structural diagram of a filter parameter adjuster of one embodiment of the present invention The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments herein. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG.
- Step 101 Presetting a dispersion compensation value or a dispersion compensation list of a protection path of a phase receiving system
- Step 102 When it is required to adjust the dispersion of the protection path, adjust the dispersion compensation parameter required for the protection path dispersion according to the preset dispersion compensation value or the dispersion compensation list configuration.
- step 4 includes 101: Step 201: When the phase receiving system is initialized, determine a dispersion state of the protection path; Step 202: Set a dispersion compensation value or a dispersion compensation list of the protection path according to a dispersion condition of the protection path.
- Step 202 includes: setting a dispersion compensation value corresponding to the protection path when the dispersion of the protection path is known, or setting the dispersion compensation list in order of the dispersion probability of the protection path when the dispersion of the protection path is unknown.
- Step 1011 Determine, according to the dispersion feedback information, whether the dispersion of the protection path needs to be adjusted.
- the filter parameter adjuster first presets the protection path dispersion compensation value or the dispersion compensation list.
- the filter parameter adjuster monitors the dispersion feedback information to indicate that the dispersion compensation filter needs to re-adjust the dispersion of the protection path, the filter The parameter adjuster performs the dispersion compensation parameter modification, and configures the dispersion compensation parameter of the dispersion compensation filter as the dispersion compensation value of the preset protection path or the dispersion compensation value in the dispersion compensation list, thereby quickly recovering the service.
- the dispersion compensation value or the dispersion compensation list of the preset protection path is divided into the following three cases.
- the phase receiving system can determine which case to use when initializing: If the protection path dispersion is unique, the filter parameter adjuster presets the protection path.
- Dispersion compensation value If there are multiple dispersion paths, the filter parameter adjuster presets multiple dispersion compensation values corresponding to multiple protection paths; if the protection path dispersion is unknown and the prediction is difficult, the filter parameter adjuster sets the dispersion compensation list.
- the most probable dispersion is ranked first, and the less likely dispersion is followed by the order, that is, the dispersion compensation list is set in descending order of the probability of occurrence of dispersion.
- an embodiment of a filter parameter adjuster according to the present invention is applied to a phase receiving system, including: a preset module 34, configured to preset a dispersion compensation value or a dispersion compensation list of a protection path of the phase receiving system; and a compensation module 33, configured to: according to a preset dispersion compensation value or dispersion compensation when the dispersion of the protection path needs to be adjusted
- the list configuration adjusts the dispersion compensation parameters required to protect the path dispersion.
- the preset module 34 includes: a determining unit 31, configured to determine a dispersion state of the protection path when the phase receiving system is initialized; and an initializing unit 32, configured to set a dispersion compensation value or a dispersion compensation list of the protection path according to the dispersion state of the protection path.
- the initializing unit 32 is configured to set a dispersion compensation value corresponding to the protection path when the dispersion of the protection path is known, or to set the dispersion compensation list in order of the dispersion probability of the protection path when the dispersion of the protection path is unknown.
- Another embodiment of the filter parameter adjuster of the present invention is also provided.
- the method further includes: a determining module 35, configured to determine, according to the dispersion feedback information, whether the dispersion of the protection path needs to be adjusted.
- a determining module 35 configured to determine, according to the dispersion feedback information, whether the dispersion of the protection path needs to be adjusted.
- the determination module 35 monitors the dispersion feedback information to indicate that the dispersion compensation filter needs to re-adjust the dispersion of the protection path, and compensates
- the module 33 performs the dispersion compensation parameter modification, and configures the dispersion compensation parameter of the dispersion compensation filter as the dispersion compensation value of the preset protection path or the dispersion compensation value in the dispersion compensation list, thereby quickly recovering the service.
- the initialization unit 32 presets the dispersion compensation value or the dispersion compensation list of the protection path to be specifically divided into the following three cases, and the determining unit 31 determines which condition is used when the phase receiving system is initialized: if the protection path dispersion is unique, the initialization unit 32 presets The dispersion compensation value of the protection path; if there are multiple dispersion of the protection path, the initialization unit 32 presets a plurality of dispersion compensation values corresponding to the plurality of protection paths; if the protection path dispersion is unknown and the prediction difficulty is large, the initialization unit 32 sets the dispersion compensation column In the table, the most probable dispersion is ranked first, and the less likely dispersion is followed by the order, that is, the dispersion compensation list is set in descending order of the probability of occurrence of dispersion.
- the optimized filter parameter adjuster performs dispersion compensation according to the dispersion compensation value or the dispersion compensation list of the preset protection path when the protection switching occurs, and adjusts the dispersion of the protection path in a short time to realize fast Protection switching.
- the electric domain dispersion compensation method and the filter parameter adjuster described in the above embodiments perform dispersion compensation according to a dispersion compensation value or a dispersion compensation list of a preset protection path when a protection switching occurs, in a short time. Adjusting the dispersion of the protection path internally enables fast protection switching.
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Abstract
本发明揭示了一种电域色散补偿的方法和滤波器参数调整器，应用于相干接收系统，上述方法包括步骤：预设所述相干接收系统的保护路径的色散补偿值或色散补偿列表；当需要调整所述保护路径的色散时，根据所述预设的色散补偿值或色散补偿列表配置调整所述保护路径色散所需的色散补偿参数。本发明提出的电域色散补偿的方法和滤波器参数调整器，实现了快速保护倒换。
Description
电域色散 M尝的方法和滤波器参数调整器 技术领域 本发明涉及到通信领域， 特别涉及到一种电域色散补偿的方法和滤波器 参数调整器。 背景技术 参照图 1 ,通常电域色散补偿器由色散补偿滤波器 10、 自适应滤波器 20、 色散反馈器 40及滤波器参数调整器 30组成。 滤波器参数调整器 30 中存储 了色散和相应滤波器参数的查找表， 当色散补偿滤波器 10 配置特定色散补 偿的滤波器参数， 自适应滤波器 20 补偿残余色散和偏振模色散后， 色散反 馈器 40 分析信号可得到色散反馈信息， 色散反馈信息与信号的色散补偿效 果密切相关， 通过分析色散反馈信息可以判断色散补偿是否合适。 保护倒换系统中， 保护路径的色散与工作路径的色散很可能不同， 因此 相千接收系统需重新调整色散补偿滤波器 10 的参数才可能正确恢复业务， 而参数调整过程中需要根据色散反馈信息判断当前色散补偿是否合适， 从而 调整色散滤波参数， 整个过程需要搜索若千个色散， 时间较长， 导致保护倒 换时间过长。 发明内容 本发明的主要目的为提供一种电域色散补偿的方法和滤波器参数调整 器， 实现快速保护倒换。 本发明提出一种电域色散补偿的方法，应用于相千接收系统， 包括步骤： 预设所述相千接收系统的保护路径的色散补偿值或色散补偿列表； 当需要调整所述保护路径的色散时， 根据所述预设的色散补偿值或色散 补偿列表配置调整所述保护路径色散所需的色散补偿参数。 优选地， 所述预设相千接收系统的保护路径色散补偿值或色散补偿列表 包括：
所述相千接收系统初始化时， 判断所述保护路径的色散状况； 根据所述保护路径的色散状况， 设置所述保护路径的色散补偿值或色散 补偿列表。 优选地， 所述根据保护路径的色散状况， 设置保护路径的色散补偿值或 色散补偿列表包括： 当所述保护路径的色散已知时，设置与所述保护路径对应的色散补偿值。 优选地， 所述根据保护路径的色散状况， 设置保护路径的色散补偿值或 色散补偿列表包括： 当所述保护路径的色散未知时， 按所述保护路径的色散可能性大小顺序 设置色散补偿列表。 优选地， 所述当需要调整保护路径的色散时， 根据预设的色散补偿值或 色散补偿列表配置调整所述保护路径色散所需的色散补偿参数之前，还包括： 根据色散反馈信息判断是否需要调整所述保护路径的色散。 本发明还提出一种滤波器参数调整器， 应用于相千接收系统， 包括： 预设模块， 用于预设所述相千接收系统的保护路径的色散补偿值或色散 补偿列表； 补偿模块， 用于当需要调整所述保护路径的色散时， 根据所述预设的色 散补偿值或色散补偿列表配置调整所述保护路径色散所需的色散补偿参数。 优选地， 所述预设模块包括： 判断单元， 用于所述相千接收系统初始化时， 判断所述保护路径的色散 状况； 初始化单元， 根据所述保护路径的色散状况， 设置保护路径的色散补偿 值或色散补偿列表。 优选地， 所述初始化单元用于当所述保护路径的色散已知时， 设置与所 述保护路径对应的色散补偿值。
优选地， 所述初始化单元用于当所述保护路径的色散未知时， 按所述保 护路径的色散可能性大小顺序设置色散补偿列表。 优选地， 还包括判断模块， 用于根据色散反馈信息判断是否需要调整所 述保护路径的色散。 本发明提出的电域色散补偿的方法和滤波器参数调整器， 在发生保护倒 换时， 根据预设的保护路径的色散补偿值或色散补偿列表进行色散补偿， 在 短时间内调整保护路径的色散， 实现快速保护倒换。 附图说明 图 1为现有电域色散补偿器的结构示意图； 图 2为根据本发明的一个实施例的电域色散补偿的方法的流程示意图； 图 3为根据本发明的一个实施例的电域色散补偿的方法的预设保护路径 的色散补偿值或色散补偿列表的流程示意图； 图 4 为才艮据本发明的另一个实施例的电域色散补偿的方法的流程示意 图； 图 5为 居本发明的一个实施例的滤波器参数调整器的结构示意图。 本发明目的的实现、 功能特点及优点将结合实施例， 参照附图故进一步 说明。 具体实施方式 参照图 2, 提出本发明电域色散补偿的方法一实施例， 应用于相千接收 系统， 包括： 步骤 101 ,预设相千接收系统的保护路径的色散补偿值或色散补偿列表； 步骤 102, 当需要调整保护路径的色散时， 根据预设的色散补偿值或色 散补偿列表配置调整保护路径色散所需的色散补偿参数。 参照图 3 , 步 4聚 101包括： 步骤 201 , 相千接收系统初始化时， 判断保护路径的色散状况;
步骤 202, 根据保护路径的色散状况， 设置保护路径的色散补偿值或色 散补偿列表。 步骤 202包括： 当保护路径的色散已知时， 设置与保护路径对应的色散 补偿值， 或当保护路径的色散未知时， 按保护路径的色散可能性大小顺序设 置色散补偿列表。 参照图 4, 提出本发明电域色散补偿的方法又一实施例， 在上述实施例 中， 步骤 102之前， 还包括： 步骤 1011 , 根据色散反馈信息判断是否需要调整保护路径的色散。 下面详细说明本发明实施例提供的电域色散补偿的方法的工作原理。 滤波器参数调整器首先预设保护路径色散补偿值或色散补偿列表， 当发 生保护倒换时， 滤波器参数调整器监测到色散反馈信息提示色散补偿滤波器 需要重新调整保护路径的色散时，滤波器参数调整器执行色散补偿参数修改， 将色散补偿滤波器的色散补偿参数配置为预设的保护路径的色散补偿值或色 散补偿列表内的色散补偿值， 从而迅速恢复业务。 预设保护路径的色散补偿 值或色散补偿列表具体分下面三种情况， 相千接收系统在初始化时可确定釆 用何种情况： 如果保护路径色散唯一，滤波器参数调整器预设保护路径的色散补偿值； 如果保护路径色散有多个， 滤波器参数调整器预设对应多个保护路径的 多个色散补偿值； 如果保护路径色散未知且预测难度大， 滤波器参数调整器设置色散补偿 列表， 可能性最大的色散排在前面， 可能性较小的色散依次排在后面， 也就 是说， 按照色散发生的可能性从大到小的顺序设置色散补偿列表。 以上实施例提出的电域色散补偿的方法， 在发生保护倒换时， 根据预设 的保护路径的色散补偿值或色散补偿列表进行色散补偿， 在短时间内调整保 护路径的色散， 优化了滤波器参数调整器， 实现快速保护倒换。 参照图 5 , 提出本发明滤波器参数调整器一实施例， 应用于相千接收系 统， 包括：
预设模块 34 , 用于预设相千接收系统的保护路径的色散补偿值或色散补 偿列表； 补偿模块 33 , 用于当需要调整保护路径的色散时， 根据预设的色散补偿 值或色散补偿列表配置调整保护路径色散所需的色散补偿参数。 预设模块 34包括： 判断单元 31 , 用于相千接收系统初始化时， 判断保护路径的色散状况； 初始化单元 32 , 根据保护路径的色散状况， 设置保护路径的色散补偿值 或色散补偿列表。 初始化单元 32 用于当保护路径的色散已知时， 设置与保护路径对应的 色散补偿值， 或当保护路径的色散未知时， 按保护路径的色散可能性大小顺 序设置色散补偿列表。 还提出了本发明滤波器参数调整器另一实施例， 在上述实施例中， 还包 括： 判断模块 35 , 用于根据色散反馈信息判断是否需要调整保护路径的色 散。 下面详细说明本发明实施例的滤波器参数调整器的工作原理。 滤波器参数调整器的初始化单元 32 首先预设保护路径色散补偿值或色 散补偿列表， 当发生保护倒换， 判断模块 35 监测到色散反馈信息提示色散 补偿滤波器需要重新调整保护路径的色散时， 补偿模块 33 执行色散补偿参 数修改， 将色散补偿滤波器的色散补偿参数配置为预设的保护路径的色散补 偿值或色散补偿列表内的色散补偿值， 从而迅速恢复业务。 初始化单元 32 预设保护路径的色散补偿值或色散补偿列表具体分下面三种情况， 判断单元 31判断相千接收系统在初始化时釆用何种情况： 如果保护路径色散唯一， 初始化单元 32预设保护路径的色散补偿值； 如果保护路径色散有多个， 初始化单元 32 预设对应多个保护路径的多 个色散补偿值； 如果保护路径色散未知且预测难度大， 初始化单元 32 设置色散补偿列
表， 可能性最大的色散排在前面， 可能性较小的色散依次排在后面， 也就是 说， 按照色散发生的可能性从大到小的顺序设置色散补偿列表。 该实施例提供的的优化的滤波器参数调整器， 在发生保护倒换时， 根据 预设的保护路径的色散补偿值或色散补偿列表进行色散补偿， 在短时间内调 整保护路径的色散， 实现快速保护倒换。 综上所述，以上实施例描述的电域色散补偿的方法和滤波器参数调整器， 在发生保护倒换时， 根据预设的保护路径的色散补偿值或色散补偿列表进行 色散补偿， 在短时间内调整保护路径的色散， 能够实现快速保护倒换。 以上所述仅为本发明的优选实施例， 并非因此限制本发明的专利范围， 凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换， 或直接 或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。
Claims
1. 一种电域色散补偿的方法， 应用于相千接收系统， 其特征在于， 包括： 预设所述相千接收系统的保护路径的色散补偿值或色散补偿列 表；
当需要调整所述保护路径的色散时， 根据所述预设的色散补偿值 或色散补偿列表配置调整所述保护路径色散所需的色散补偿参数。
2. 如权利要求 1 所述的电域色散补偿的方法， 其特征在于， 所述预设相 千接收系统的保护路径色散补偿值或色散补偿列表包括：
所述相千接收系统初始化时， 判断所述保护路径的色散状况； 根据所述保护路径的色散状况， 设置所述保护路径的所述色散补 偿值或所述色散补偿列表。
3. 如权利要求 2所述的电域色散补偿的方法， 其特征在于， 所述根据保 护路径的色散状况，设置保护路径的色散补偿值或色散补偿列表包括： 当所述保护路径的色散已知时， 设置与所述保护路径对应的色散 补偿值。
4. 如权利要求 2所述的电域色散补偿的方法， 其特征在于， 所述根据保 护路径的色散状况，设置保护路径的色散补偿值或色散补偿列表包括： 当所述保护路径的色散未知时， 按所述保护路径的色散可能性大 小顺序设置色散补偿列表。
5. 如权利要求 1至 4中任一项所述的电域色散补偿的方法，其特征在于， 所述当需要调整保护路径的色散时， 根据预设的色散补偿值或色散补 偿列表配置调整所述保护路径色散所需的色散补偿参数之前，还包括： 根据色散反馈信息判断是否需要调整所述保护路径的色散。
6. —种滤波器参数调整器， 应用于相千接收系统， 其特征在于， 包括： 预设模块， 用于预设所述相千接收系统的保护路径的色散补偿值 或色散补偿列表；
补偿模块， 用于当需要调整所述保护路径的色散时， 根据所述预 设的色散补偿值或色散补偿列表配置调整所述保护路径色散所需的色 散补偿参数。
7. 如权利要求 6所述的滤波器参数调整器， 其特征在于， 所述预设模块 包括：
判断单元， 用于所述相千接收系统初始化时， 判断所述保护路径 的色散状况；
初始化单元， 才艮据所述保护路径的色散状况， 设置所述保护路径 的所述色散补偿值或所述色散补偿列表。
8. 如权利要求 7所述的滤波器参数调整器， 其特征在于， 所述初始化单 元用于当所述保护路径的色散已知时， 设置与所述保护路径对应的色 散补偿值。
9. 如权利要求 7所述的滤波器参数调整器， 其特征在于， 所述初始化单 元用于当所述保护路径的色散未知时， 按所述保护路径的色散可能性 大小顺序设置色散补偿列表。
10. 如权利要求 6至 9中任一项所述的滤波器参数调整器， 其特征在于， 还包括判断模块， 用于根据色散反馈信息判断是否需要调整所述保护 路径的色散。
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| WO2009081449A1 (ja) * | 2007-12-20 | 2009-07-02 | Fujitsu Limited | 波長分割多重装置及び光信号の分散補償方法 |
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