公开(公告)号：US08532502B2

公开(公告)日：2013-09-10

申请号：US12479363

申请日：2009-06-05

申请人： Huijian Zhang ,  Zhenning Tao ,  Takahito Tanimura

发明人： Huijian Zhang ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H04B10/06

CPC分类号： H04B10/6166 ,  H04B10/61 ,  H04B10/611 ,  H04B10/614 ,  H04J14/06

摘要： In present invention, a filter coefficient adjustment apparatus is used in a polarization demultiplexer which demultiplexes the input signals by using filters to obtain demultiplexed output signals, said filter coefficient adjustment apparatus being used for adjusting the coefficients of the filters, wherein said filter coefficient adjustment apparatus comprises: an logarithm partial derivative calculation unit for calculating the logarithm partial derivative value of a target probability density function of the demultiplexed output signals when its self-variable value is the present demultiplexed output signal value; a gradient calculation unit for calculating the gradient of a target optimizing function for optimizing the distribution of the multiplexed output signals based on the logarithm partial derivative value calculated by the logarithm partial derivative calculation unit; and a filter coefficient updating unit for updating the coefficients of the filters based on the gradient calculated by the gradient calculation unit.

摘要翻译： 在本发明中，滤波器系数调整装置用于通过使用滤波器对输入信号进行解复用以获得解复用输出信号的偏振解复用器，所述滤波器系数调整装置用于调整滤波器的系数，其中所述滤波器系数调整装置 包括：对数偏导数计算单元，用于当其自变量值为当前解复用的输出信号值时，计算解复用输出信号的目标概率密度函数的对数偏导数值; 梯度计算单元，用于基于由对数偏导数计算单元计算的对数偏导数值来计算用于优化多路复用输出信号的分布的目标优化函数的梯度; 以及滤波器系数更新单元，用于基于由梯度计算单元计算的梯度来更新滤波器的系数。

公开(公告)号：US20100003028A1

公开(公告)日：2010-01-07

申请号：US12479363

申请日：2009-06-05

申请人： Huijian ZHANG ,  Zhenning Tao ,  Takahito Tanimura

发明人： Huijian ZHANG ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H04J14/06

CPC分类号： H04B10/6166 ,  H04B10/61 ,  H04B10/611 ,  H04B10/614 ,  H04J14/06

摘要： In present invention, a filter coefficient adjustment apparatus is used in a polarization demultiplexer which demultiplexes the input signals by using filters to obtain demultiplexed output signals, said filter coefficient adjustment apparatus being used for adjusting the coefficients of the filters, wherein said filter coefficient adjustment apparatus comprises: an logarithm partial derivative calculation unit for calculating the logarithm partial derivative value of a target probability density function of the demultiplexed output signals when its self-variable value is the present demultiplexed output signal value; a gradient calculation unit for calculating the gradient of a target optimizing function for optimizing the distribution of the multiplexed output signals based on the logarithm partial derivative value calculated by the logarithm partial derivative calculation unit; and a filter coefficient updating unit for updating the coefficients of the filters based on the gradient calculated by the gradient calculation unit.

摘要翻译： 在本发明中，滤波器系数调整装置用于通过使用滤波器对输入信号进行解复用以获得解复用输出信号的偏振解复用器，所述滤波器系数调整装置用于调整滤波器的系数，其中所述滤波器系数调整装置 包括：对数偏导数计算单元，用于当其自变量值为当前解复用的输出信号值时，计算解复用输出信号的目标概率密度函数的对数偏导数值; 梯度计算单元，用于基于由对数偏导数计算单元计算的对数偏导数值来计算用于优化多路复用输出信号的分布的目标优化函数的梯度; 以及滤波器系数更新单元，用于基于由梯度计算单元计算的梯度来更新滤波器的系数。

公开(公告)号：US08442406B2

公开(公告)日：2013-05-14

申请号：US13020831

申请日：2011-02-04

申请人： Jianqiang Li ,  Huijian Zhang ,  Zhenning Tao ,  Takahito Tanimura

发明人： Jianqiang Li ,  Huijian Zhang ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H04B10/00 ,  H04B10/04 ,  H04B10/06

CPC分类号： H04L25/03019 ,  H04B10/611 ,  H04B10/614 ,  H04L25/0305 ,  H04L27/3818

摘要： The present invention relates to filter, coherent receiver device and coherent receiving method. The filter is used for converting a partial response signal into a full response signal, wherein the filter uses the following transfer function HPre-Filter(z) with respect to a partial response signal having a transfer function H PR ⁡ ( z ) = A ⁡ ( 1 + z - 1 ) m ⁢ ( 1 - z - 1 ) n : ⁢ ⁢ H Pre - Filter ⁡ ( z ) = 1 A ⁡ ( 1 + α ⁢ ⁢ z - 1 ) m ⁢ ( 1 - α ⁢ ⁢ z - 1 ) n , in which A is other item, m and n are integers larger than or equal to 0 but not being 0 at the same time, 0

摘要翻译： 本发明涉及滤波器，相干接收机装置和相干接收方法。 该滤波器用于将部分响应信号转换为全响应信号，其中该滤波器相对于具有传递函数H PR⁡（z）= A⁡的部分响应信号使用以下传递函数HPre-Filter（z） （1 + z-1）m（1-z-1）n：通用H预滤波器⁡（z）= 1 A⁡（1 + z-1）n，其中A是其他项，m和n是大于或等于0但不是同时为0的整数，0 <α<1。

公开(公告)号：US20110243561A1

公开(公告)日：2011-10-06

申请号：US13020831

申请日：2011-02-04

申请人： Jianqiang LI ,  Huijian Zhang ,  Zhenning Tao ,  Takahito Tanimura

发明人： Jianqiang LI ,  Huijian Zhang ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H04B10/06 ,  H04J14/06

CPC分类号： H04L25/03019 ,  H04B10/611 ,  H04B10/614 ,  H04L25/0305 ,  H04L27/3818

摘要： The present invention relates to filter, coherent receiver device and coherent receiving method. The filter is used for converting a partial response signal into a full response signal, wherein the filter uses the following transfer function HPre-Filter(z) with respect to a partial response signal having a transfer function H PR  ( z ) = A  ( 1 + z - 1 ) m  ( 1 - z - 1 ) n :   H Pre - Filter  ( z ) = 1 A  ( 1 + α   z - 1 ) m  ( 1 - α   z - 1 ) n , in which A is other item, m and n are integers larger than or equal to 0 but not being 0 at the same time, 0

摘要翻译： 本发明涉及滤波器，相干接收机装置和相干接收方法。 滤波器用于将部分响应信号转换成全响应信号，其中滤波器对于具有传递函数H PR（z）= A的部分响应信号使用以下传递函数HPre-Filter（z） （1 + z-1）m（1-z-1）n：前一个滤波器（z）= 1 A（1 +α） z-1）n，其中A是其他项，m和n是大于或等于0但不同时为0的整数，0 <α<1。

公开(公告)号：US08798477B2

公开(公告)日：2014-08-05

申请号：US12623009

申请日：2009-11-20

申请人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

发明人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H04B10/12 ,  H04B10/00

CPC分类号： H04B10/07951 ,  H04B10/25133

摘要： The present invention relates to chromatic dispersion monitor and method, chromatic dispersion compensator. The chromatic dispersion monitor is used for estimating a chromatic dispersion in accordance with a chromatic dispersion correlation amount sequence, comprising: a phase differential unit, for obtaining a phase difference sequence by performing a phase differential calculation in accordance with the chromatic dispersion correlation amount sequence; a phase difference differential unit, for obtaining a phase difference differential sequence by performing a phase difference differential operation; and a chromatic dispersion estimating unit, for estimating the chromatic dispersion in accordance with the phase difference differential sequence obtained by the phase difference differential unit.

摘要翻译： 本发明涉及色散监视器和方法，色散补偿器。 色散监视器用于根据色散相关量序列估计色散，包括：相位差单元，用于通过根据色散相关量序列执行相位差计算来获得相位差序列; 相位差差分单元，用于通过执行相位差差分运算来获得相位差差分序列; 以及色散估计单元，用于根据由相位差差分单元获得的相位差差分序列来估计色散。

公开(公告)号：US08787437B2

公开(公告)日：2014-07-22

申请号：US12479268

申请日：2009-06-05

申请人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

发明人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H03H7/30

CPC分类号： H04L25/03057

摘要： An adaptive equalizer and an adaptive equalizing method are provided. The adaptive equalizer includes an adaptive equalizing unit, for adaptively equalizing an inputted signal to output the equalized signal; a coefficient updating unit, for updating a coefficient of a filter of the adaptive equalizing unit; a switching unit, connected between the coefficient updating unit and the adaptive equalizing unit and a monitoring device, for controlling on or off of the switching unit in accordance with the fact that a down sampling phase of the inputted signal or a down sampling phase of the equalized signal is within a predetermined range. When the switching unit is on, the coefficient updating unit is capable of updating the coefficient of the adaptive equalizing unit, and when the switching unit is off, the coefficient updating unit is incapable of updating the coefficient of the adaptive equalizing unit.

摘要翻译： 提供了自适应均衡器和自适应均衡方法。 自适应均衡器包括自适应均衡单元，用于自适应地均衡输入的信号以输出均衡的信号; 系数更新单元，用于更新自适应均衡单元的滤波器的系数; 连接在系数更新单元和自适应均衡单元之间的切换单元和监视设备，用于根据以下事实控制开关单元的接通或关断：输入信号的下采样相位或下采样相位 均衡信号在预定范围内。 当切换单元打开时，系数更新单元能够更新自适应均衡单元的系数，并且当切换单元关闭时，系数更新单元不能更新自适应均衡单元的系数。

公开(公告)号：US20090304064A1

公开(公告)日：2009-12-10

申请号：US12479268

申请日：2009-06-05

申请人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

发明人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H03H7/30 ,  H03H7/40

CPC分类号： H04L25/03057

摘要： The present invention relates to an adaptive equalizer and an adaptive equalizing method. The adaptive equalizer comprises an adaptive equalizing unit, for adaptively equalizing an inputted signal to output the equalized signal; a coefficient updating unit, for updating a coefficient of a filter of the adaptive equalizing unit; a switching unit, connected between the coefficient updating unit and the adaptive equalizing unit, wherein when the switching unit is on, the coefficient updating unit is capable of updating the coefficient of the adaptive equalizing unit, and when the switching unit is off, the coefficient updating unit is incapable of updating the coefficient of the adaptive equalizing unit; and a monitoring device, for controlling on or off of the switching unit in accordance with a down sampling phase of the inputted signal or a down sampling phase of the equalized signal.

摘要翻译： 本发明涉及自适应均衡器和自适应均衡方法。 自适应均衡器包括自适应均衡单元，用于自适应均衡输入信号以输出均衡信号; 系数更新单元，用于更新自适应均衡单元的滤波器的系数; 连接在系数更新单元和自适应均衡单元之间的切换单元，其中当切换单元接通时，系数更新单元能够更新自适应均衡单元的系数，并且当切换单元关闭时，系数 更新单元不能更新自适应均衡单元的系数; 以及监视装置，用于根据输入信号的下采样相位或均衡信号的下采样相位来控制开关单元的接通或关断。

公开(公告)号：US20090245816A1

公开(公告)日：2009-10-01

申请号：US12320793

申请日：2009-02-04

申请人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

发明人： Ling Liu ,  Zhenning Tao ,  Takahito Tanimura

IPC分类号： H04B10/06

CPC分类号： H04B10/6971 ,  H04B10/60 ,  H04B10/611 ,  H04B10/616

摘要： The present invention discloses filter coefficient changing apparatus and method for use in a dual-polarized optical coherent receiver. The apparatus comprises a controlling unit, a switching unit and a new coefficient obtaining unit. The switching unit is connected between a first filter coefficient updating unit and a first filtering unit and a second filtering unit; the new coefficient obtaining unit generates new filter coefficients for the first filtering unit and the second filtering unit in accordance with filter coefficients outputted by a second filter coefficient updating unit; and the controlling unit generates a control signal that controls switching of the switching unit. Upon reception of the control signal, the switching unit breaks off output of the filter coefficients from the first filter coefficient updating unit, transmits new filter coefficients from the new coefficient obtaining unit to the first filtering unit and the second filtering unit, and subsequently resumes the output of the filter coefficients from the first filter coefficient updating unit to the first filtering unit and the second filtering unit.

摘要翻译： 本发明公开了一种在双偏振光学相干接收机中使用的滤波器系数改变装置和方法。 该装置包括控制单元，切换单元和新系数获取单元。 切换单元连接在第一滤波器系数更新单元和第一滤波单元与第二滤波单元之间; 新系数获取单元根据由第二滤波器系数更新单元输出的滤波系数，生成用于第一滤波单元和第二滤波单元的新滤波器系数; 并且所述控制单元产生控制所述切换单元的切换的控制信号。 在接收到控制信号时，切换单元从第一滤波器系数更新单元中断滤波器系数的输出，将新的滤波器系数从新系数获取单元发送到第一滤波单元和第二滤波单元，随后恢复 将滤波器系数从第一滤波器系数更新单元输出到第一滤波单元和第二滤波单元。

公开(公告)号：US08687646B2

公开(公告)日：2014-04-01

申请号：US13114537

申请日：2011-05-24

申请人： Huijian Zhang ,  Zhenning Tao

发明人： Huijian Zhang ,  Zhenning Tao

IPC分类号： H04J3/16

CPC分类号： H04L5/0007 ,  H04L1/0016 ,  H04L1/0021 ,  H04L5/0046 ,  H04L5/006

摘要： The present invention discloses a method and apparatus for bit and power allocation and a communication system. The method for bit and power allocation comprises: determining a set of candidate modulation modes for sub-channels; constructing an SNR lookup table according to a predetermined target BER, the SNR lookup table containing a relationship of an SNR and the number of bits corresponding to a modulation mode in the set of candidate modulation modes at the target BER; obtaining normalized SNRs on the sub-channels; initializing the numbers of bits for the sub-channels; initializing powers for the sub-channels according to the numbers of bits for the sub-channels, the normalized SNRs on the sub-channels and the SNR lookup table; and adjusting the numbers of bits and the powers for the sub-channels in accordance with a principle of maximizing power utilization rate, to obtain the result of the bit and power allocation for the sub-channels.

摘要翻译： 本发明公开了一种用于比特和功率分配的方法和装置以及通信系统。 用于比特和功率分配的方法包括：确定用于子信道的一组候选调制模式; 根据预定目标BER构建SNR查找表，所述SNR查找表包含与所述目标BER中的候选调制模式集合中的调制模式相对应的SNR和比特数的关系; 在子信道上获得归一化的SNR; 初始化子信道的比特数; 根据子信道的比特数，子信道的归一化SNR和SNR查找表，初始化子信道的功率; 并且根据最大化功率利用率的原理来调整子信道的比特数和功率，以获得子信道的比特和功率分配的结果。

公开(公告)号：US08374512B2

公开(公告)日：2013-02-12

申请号：US12219938

申请日：2008-07-30

申请人： Zhenning Tao ,  Huijian Zhang ,  Takeshi Hoshida ,  Lei Li

发明人： Zhenning Tao ,  Huijian Zhang ,  Takeshi Hoshida ,  Lei Li

IPC分类号： H04B10/06 ,  H04B10/08

CPC分类号： H04B10/6164 ,  H04B10/61 ,  H04B10/613 ,  H04B10/63

摘要： The present invention provides a frequency offset monitoring device and an optical coherent receiver. A low speed frequency offset monitoring device comprises a signal speed lowering section, for lowering the speed of an inputted signal and outputting the speed lowered signal, and a frequency offset monitor, for monitoring frequency offset of the speed lowered signal outputted by the signal speed lowering section.