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：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：US08762086B2

公开(公告)日：2014-06-24

申请号：US12232179

申请日：2008-09-11

申请人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

发明人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

IPC分类号： G01R13/00

CPC分类号： H04L27/3863 ,  H04L27/3872

摘要： The present invention discloses a phase imbalance monitoring apparatus, an amplitude imbalance monitoring apparatus, as well as an apparatus incorporating the same. The phase imbalance monitoring apparatus is for use in an apparatus in which imbalance between an I branch signal and a Q branch signal in quadrature to each other is required to be monitored, and is characterized in comprising a preprocessing unit, for performing preprocessing on the I branch signal and the Q branch signal to extract essential information relevant to correlation of the signals; and a correlation unit, for performing correlation processing on the extracted essential information to learn of the phase imbalance between the I branch signal and the Q branch signal.

摘要翻译： 本发明公开了一种相位不平衡监视装置，振幅不平衡监视装置，以及包括该不平衡监视装置的装置。 相位不平衡监视装置用于需要监视I分支信号和彼此正交的Q分支信号之间的不平衡的装置，其特征在于包括预处理单元，用于对I进行预处理 分支信号和Q分支信号，以提取与信号相关性相关的基本信息; 以及相关单元，用于对所提取的基本信息执行相关处理，以了解I分支信号和Q分支信号之间的相位不平衡。

公开(公告)号：US20110243575A1

公开(公告)日：2011-10-06

申请号：US12906560

申请日：2010-10-18

申请人： Meng YAN ,  Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

发明人： Meng YAN ,  Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

IPC分类号： H04B10/06 ,  H03H7/30

CPC分类号： H04L25/0305 ,  H04L2025/03401 ,  H04L2025/03675

摘要： The present application discloses a method for adaptive blind equalization of a PSK signal, an equalizer and a receiver. According to embodiments as provided, a conjugate product of a current output and a precedent output of an FIR filter is calculated, an equalization coefficient is updated using the conjugate product, and then an input signal is filtered using the FIR filter with the updated equalization coefficient. The embodiments as provided is applicable to adaptive blind equalization of any phase shift keying signal including a BPSK signal.

摘要翻译： 本申请公开了一种用于PSK信号，均衡器和接收机的自适应盲均衡的方法。 根据提供的实施例，计算FIR滤波器的电流输出和先前输出的共轭乘积，使用共轭乘积来更新均衡系数，然后使用具有更新的均衡系数的FIR滤波器对输入信号进行滤波 。 所提供的实施例可应用于包括BPSK信号的任何相移键控信号的自适应盲均衡。

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.

公开(公告)号：US20090119043A1

公开(公告)日：2009-05-07

申请号：US12232179

申请日：2008-09-11

申请人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

发明人： Zhenning Tao ,  Jun Tian ,  Huijian Zhang ,  Hisao Nakashima

IPC分类号： G01R13/00

CPC分类号： H04L27/3863 ,  H04L27/3872

摘要： The present invention discloses a phase imbalance monitoring apparatus, an amplitude imbalance monitoring apparatus, as well as an apparatus incorporating the same. The phase imbalance monitoring apparatus is for use in an apparatus in which imbalance between an I branch signal and a Q branch signal in quadrature to each other is required to be monitored, and is characterized in comprising a preprocessing unit, for performing preprocessing on the I branch signal and the Q branch signal to extract essential information relevant to correlation of the signals; and a correlation unit, for performing correlation processing on the extracted essential information to learn of the phase imbalance between the I branch signal and the Q branch signal.

摘要翻译： 本发明公开了一种相位不平衡监视装置，振幅不平衡监视装置，以及包括该不平衡监视装置的装置。 相位不平衡监视装置用于需要监视I分支信号和彼此正交的Q分支信号之间的不平衡的装置，其特征在于包括预处理单元，用于对I进行预处理 分支信号和Q分支信号，以提取与信号相关性相关的基本信息; 以及相关单元，用于对所提取的基本信息执行相关处理，以了解I分支信号和Q分支信号之间的相位不平衡。

公开(公告)号：US08666262B2

公开(公告)日：2014-03-04

申请号：US12906560

申请日：2010-10-18

申请人： Meng Yan ,  Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

发明人： Meng Yan ,  Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

IPC分类号： H04B10/60

CPC分类号： H04L25/0305 ,  H04L2025/03401 ,  H04L2025/03675

摘要： The present application discloses a method for adaptive blind equalization of a PSK signal, an equalizer and a receiver. According to embodiments as provided, a conjugate product of a current output and a precedent output of an FIR filter is calculated, an equalization coefficient is updated using the conjugate product, and then an input signal is filtered using the FIR filter with the updated equalization coefficient. The embodiments as provided is applicable to adaptive blind equalization of any phase shift keying signal including a BPSK signal.

摘要翻译： 本申请公开了一种用于PSK信号，均衡器和接收机的自适应盲均衡的方法。 根据提供的实施例，计算FIR滤波器的电流输出和先前输出的共轭乘积，使用共轭乘积来更新均衡系数，然后使用具有更新的均衡系数的FIR滤波器对输入信号进行滤波 。 所提供的实施例可应用于包括BPSK信号的任何相移键控信号的自适应盲均衡。

公开(公告)号：US08472814B2

公开(公告)日：2013-06-25

申请号：US12835251

申请日：2010-07-13

申请人： Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

发明人： Huijian Zhang ,  Zhenning Tao ,  Shoichiro Oda

IPC分类号： H04B10/00

CPC分类号： H04B10/6161

摘要： This application relates to an apparatus and a method for equalizing chromatic dispersion and a digital coherent optical receiver. The apparatus for equalizing chromatic dispersion comprising: a chromatic dispersion equalizing unit, for compensating chromatic dispersion of an input signal; and an additional time delay removing unit, for removing, in accordance with frequency offset of the input signal, chromatic dispersion equalization time delay generated by the chromatic dispersion equalizing unit.

摘要翻译： 本申请涉及用于均衡色散和数字相干光接收机的装置和方法。 用于均衡色散的装置包括：色散均衡单元，用于补偿输入信号的色散; 以及附加的时间延迟去除单元，用于根据输入信号的频率偏移去除由色散均衡单元产生的色散均衡时间延迟。