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1. 发明授权

US08621307B2 Soft decision threshold control in a signal receiver using soft decision error correction 失效
标题翻译：使用软判决误差校正在信号接收机中进行软判决阈值控制
公开(公告)号：US08621307B2
公开(公告)日：2013-12-31
申请号：US12108155
申请日：2008-04-23
申请人： Yi Cai , Jerzy R. Domagala , Alexei N. Pilipetskii
发明人： Yi Cai , Jerzy R. Domagala , Alexei N. Pilipetskii
IPC分类号： G06F11/30
CPC分类号： H04L1/0045
摘要： A soft decision threshold control system and method may be used with a forward error correction (FEC) scheme to adjust or tune one or more soft decision thresholds in response to one or more bit value averages for the threshold(s) and in response to a bit error rate (BER). The bit value average for a soft decision threshold generally refers to an average number of binary values (e.g., logic ones and/or zeros) occurring in a bit stream detected using the soft decision threshold. For different BER levels in a particular system, for example, one or more of the soft decision thresholds may have a predetermined bit value average, which has been determined to provide a certain level of performance (e.g., an optimum performance). Thus, one or more of the soft decision thresholds may be adjusted such that the bit value averages for the soft decision thresholds are adjusted as a function of the BER. The settings of the soft decision thresholds may also be adjusted in response to changes in a signal amplitude of the input signal being detected.
摘要翻译：软判决阈值控制系统和方法可以与前向纠错（FEC）方案一起使用，以响应于阈值的一个或多个比特值平均值并响应于一个或多个阈值平均来调整或调整一个或多个软判决阈值误码率（BER）。软判决阈值的比特值平均值通常是指使用软判决阈值检测的比特流中出现的二进制值（例如，逻辑1和/或零）的平均数。对于特定系统中的不同BER级别，例如，一个或多个软判决阈值可以具有预定的位值平均值，其被确定为提供一定水平的性能（例如，最佳性能）。因此，可以调整一个或多个软判决阈值，使得对于软判决阈值的比特值平均作为BER的函数进行调整。还可以响应于被检测的输入信号的信号幅度的变化来调整软判决阈值的设置。

2. 发明申请

US20100232809A1 Detection of Data in Signals with Data Pattern Dependent Signal Distortion 有权
标题翻译：用数据模式相关信号失真检测信号中的数据
公开(公告)号：US20100232809A1
公开(公告)日：2010-09-16
申请号：US12718132
申请日：2010-03-05
申请人： Yi Cai , Morten Nissov , Alexei N. Pilipetskii
发明人： Yi Cai , Morten Nissov , Alexei N. Pilipetskii
IPC分类号： H04B10/06 , H04L27/00
CPC分类号： H04J14/02 , H04B10/2507 , H04B10/697 , H04J14/0279
摘要： A detection system and method may be used to detect data transmitted in a signal with data pattern dependent signal distortion. In general, a detection system and method compares samples of a received signal with stored samples of distorted signals associated with known data patterns and selects the known data patterns that correspond most closely with the samples of the received signal. The detection system and method may thus mitigate the effects of data pattern dependent signal distortion.
摘要翻译：可以使用检测系统和方法来检测在具有数据模式相关信号失真的信号中发送的数据。通常，检测系统和方法将接收信号的样本与已知数据模式相关联的失真信号的存储样本进行比较，并且选择与接收信号的采样最紧密对应的已知数据模式。因此，检测系统和方法可以减轻数据模式相关信号失真的影响。

3. 发明授权

US08401400B2 Detection of data in signals with data pattern dependent signal distortion 有权
标题翻译：检测具有数据模式相关信号失真的信号中的数据
公开(公告)号：US08401400B2
公开(公告)日：2013-03-19
申请号：US12718132
申请日：2010-03-05
申请人： Yi Cai , Morten Nissov , Alexei N. Pilipetskii
发明人： Yi Cai , Morten Nissov , Alexei N. Pilipetskii
IPC分类号： H04B10/06
CPC分类号： H04J14/02 , H04B10/2507 , H04B10/697 , H04J14/0279
摘要： A detection system and method may be used to detect data transmitted in a signal with data pattern dependent signal distortion. In general, a detection system and method compares samples of a received signal with stored samples of distorted signals associated with known data patterns and selects the known data patterns that correspond most closely with the samples of the received signal. The detection system and method may thus mitigate the effects of data pattern dependent signal distortion.
摘要翻译：可以使用检测系统和方法来检测在具有数据模式相关信号失真的信号中发送的数据。通常，检测系统和方法将接收信号的样本与已知数据模式相关联的失真信号的存储样本进行比较，并且选择与接收信号的采样最紧密对应的已知数据模式。因此，检测系统和方法可以减轻数据模式相关信号失真的影响。

4. 发明授权

US08401402B2 Detection of data in signals with data pattern dependent signal distortion 有权
标题翻译：检测具有数据模式相关信号失真的信号中的数据
公开(公告)号：US08401402B2
公开(公告)日：2013-03-19
申请号：US12718154
申请日：2010-03-05
申请人： Yi Cai , Morten Nissov , Alexei N. Pilipetskii
发明人： Yi Cai , Morten Nissov , Alexei N. Pilipetskii
IPC分类号： H04B10/00 , H04B10/06
CPC分类号： H04L27/066 , H04J14/02 , H04J14/0279 , H04L1/005 , H04L1/203 , H04L1/208 , H04L5/0008 , H04L25/03171 , H04L27/223 , H04L27/227 , H04L27/3818 , H04L2027/0067 , H04L2027/0095
摘要： A detection system and method may be used to detect data transmitted in a signal with data pattern dependent signal distortion such as intersymbol interference. In general, a detection system and method compares samples of a received signal with stored samples of distorted signals associated with known data patterns and selects the known data patterns that correspond most closely with the samples of the received signal. The detection system and method may thus mitigate the effects of data pattern dependent signal distortion.
摘要翻译：可以使用检测系统和方法来检测在具有数据模式相关信号失真的信号中发送的数据，例如符号间干扰。通常，检测系统和方法将接收信号的样本与已知数据模式相关联的失真信号的存储样本进行比较，并且选择与接收信号的采样最紧密对应的已知数据模式。因此，检测系统和方法可以减轻数据模式相关信号失真的影响。

5. 发明授权

US07363553B2 System and method for adjusting soft decision thresholds in a soft-decision error correction system 失效
标题翻译：用于在软判决纠错系统中调整软决策阈值的系统和方法
公开(公告)号：US07363553B2
公开(公告)日：2008-04-22
申请号：US10972289
申请日：2004-10-22
申请人： Yi Cai , Alexei N. Pilipetskii , Morten Nissov
发明人： Yi Cai , Alexei N. Pilipetskii , Morten Nissov
IPC分类号： H03M13/00
CPC分类号： H03M13/45
摘要： The soft decision thresholds in a soft decision forward error correction (FEC) system may be adjusted based on mutual information of a detected signal. In one embodiment, a recursive algorithm may be used to optimize threshold values by maximizing the mutual information. In another embodiment, an adaptive scheme may be used to optimize threshold values based on a pre-knowledge of the noise in the channel. In a further embodiment, an adaptive scheme may be used to optimize threshold values by without pre-knowledge of the noise in the channel.
摘要翻译：可以基于检测到的信号的相互信息来调整软判决前向纠错（FEC）系统中的软判决阈值。在一个实施例中，可以使用递归算法来通过使互信息最大化来优化阈值。在另一个实施例中，可以使用自适应方案来基于信道中噪声的预先了解来优化阈值。在另一个实施例中，可以使用自适应方案来通过没有对信道中的噪声的预先知识来优化阈值。

6. 发明申请

US20100232797A1 Detection of Data in Signals with Data Pattern Dependent Signal Distortion 有权
标题翻译：用数据模式相关信号失真检测信号中的数据
公开(公告)号：US20100232797A1
公开(公告)日：2010-09-16
申请号：US12718154
申请日：2010-03-05
申请人： Yi Cai , Morten Nissov , Alexei N. Pilipetskii
发明人： Yi Cai , Morten Nissov , Alexei N. Pilipetskii
IPC分类号： H04J14/02 , H04B1/10 , H04L27/06 , H04B10/06
CPC分类号： H04L27/066 , H04J14/02 , H04J14/0279 , H04L1/005 , H04L1/203 , H04L1/208 , H04L5/0008 , H04L25/03171 , H04L27/223 , H04L27/227 , H04L27/3818 , H04L2027/0067 , H04L2027/0095
摘要： A detection system and method may be used to detect data transmitted in a signal with data pattern dependent signal distortion such as intersymbol interference. In general, a detection system and method compares samples of a received signal with stored samples of distorted signals associated with known data patterns and selects the known data patterns that correspond most closely with the samples of the received signal. The detection system and method may thus mitigate the effects of data pattern dependent signal distortion.
摘要翻译：可以使用检测系统和方法来检测在具有数据模式相关信号失真的信号中发送的数据，例如符号间干扰。通常，检测系统和方法将接收信号的样本与已知数据模式相关联的失真信号的存储样本进行比较，并且选择与接收信号的采样最紧密对应的已知数据模式。因此，检测系统和方法可以减轻数据模式相关信号失真的影响。

7. 发明授权

US09025969B2 Method with improved phase robustness in coherent detected optical system 有权
标题翻译：相干检测光学系统相位鲁棒性提高的方法
公开(公告)号：US09025969B2
公开(公告)日：2015-05-05
申请号：US13480230
申请日：2012-05-24
申请人： Chuandong Li , Yuanjie Chen , Zhuhong Zhang , Yi Cai , Fei Zhu
发明人： Chuandong Li , Yuanjie Chen , Zhuhong Zhang , Yi Cai , Fei Zhu
IPC分类号： H04B10/06 , H04B10/61
CPC分类号： H04B10/613 , H04B10/6164
摘要： An optical signal receiver tracks local oscillator frequency offset (LOFO) and compensates for the phase distortion introduced in the received signals as a result of utilizing the local oscillator within a coherent detection scheme. This phase distortion is basically a constant phase rotation caused by the LOFO and implementation of the receiver using coherent detection and a digital interferometer instead of a conventional (yet complex) carrier phase estimation or recovery scheme. With an optical receiver implemented in this manner, the requirement of using a precise local oscillator laser with low frequency offset is less important.
摘要翻译：光信号接收器跟踪本地振荡器频率偏移（LOFO），并且通过在相干检测方案中利用本地振荡器来补偿在接收信号中引入的相位失真。该相位失真基本上是由LOFO引起的恒定相位旋转和使用相干检测的接收机的实现以及数字干涉仪而不是常规（但复杂的）载波相位估计或恢复方案。通过以这种方式实现的光接收机，使用具有低频偏移的精确本地振荡器激光器的要求不那么重要。

8. 发明授权

US08732561B2 System and method for forward error correction decoding using soft information 有权
标题翻译：使用软信息进行前向纠错解码的系统和方法
公开(公告)号：US08732561B2
公开(公告)日：2014-05-20
申请号：US11937706
申请日：2007-11-09
申请人： Yi Cai , Jin-Xing Cai , Morten Nissov
发明人： Yi Cai , Jin-Xing Cai , Morten Nissov
IPC分类号： H03M13/00
CPC分类号： H04L25/067 , H03M13/2957 , H03M13/3723 , H04B10/60 , H04L1/0045 , H04L27/2331
摘要： A system and method for soft decision forward error correction (FEC) decoding may be used to determine a possible error in a differential detection signal, for example, in a DPSK system. The system and method uses the constructive and destructive signals from a demodulator to provide an error locating signal. Using the error locating signal, the system and method converts the differential detection signal into a soft decision signal including multi-level soft values.
摘要翻译：用于软判决前向纠错（FEC）解码的系统和方法可以用于例如在DPSK系统中确定差分检测信号中的可能误差。该系统和方法使用来自解调器的建设性和破坏性的信号来提供错误定位信号。使用误差定位信号，系统和方法将差分检测信号转换为包括多级软值的软判决信号。

9. 发明授权

US08340530B2 Local oscillator frequency offset compensation in a coherent optical signal receiver 有权
标题翻译：相干光信号接收机中的本地振荡器频偏补偿
公开(公告)号：US08340530B2
公开(公告)日：2012-12-25
申请号：US12718177
申请日：2010-03-05
申请人： Yi Cai
发明人： Yi Cai
IPC分类号： H04B10/00 , H04B10/06 , H04J14/02
CPC分类号： H04B10/61 , H04B10/611 , H04B10/612 , H04B10/614 , H04B10/6162 , H04B10/6164 , H04B10/6165 , H04L27/223
摘要： A system and method implementing dual stage carrier frequency offset compensation (FOC) in a coherent receiver for an optical communication system. In the first stage, a feed forward FOC function compensates for relatively slowly drifting frequency offsets. In a second stage, a decision-feedback FOC function compensates for relatively quickly drifting frequency offsets. The feed forward frequency offset compensation may be implemented with a feed forward carrier phase estimation function and the decision-feedback frequency offset compensation may be implemented with a decision-feedback carrier phase estimation function.
摘要翻译：一种在光通信系统的相干接收机中实现双级载波频偏补偿（FOC）的系统和方法。在第一阶段，前馈FOC功能补偿相对缓慢的漂移频率偏移。在第二阶段，决策反馈FOC功能补偿相对快速的漂移频率偏移。可以利用前馈载波相位估计功能实现前馈频率偏移补偿，并且可以使用判决反馈载波相位估计功能来实现判决反馈频率偏移补偿。

10. 发明申请

US20120093510A1 CORRELATION -CONTROL QPSK TRANSMITTER 失效
标题翻译：相关-CONTROL QPSK发射机
公开(公告)号：US20120093510A1
公开(公告)日：2012-04-19
申请号：US12905717
申请日：2010-10-15
申请人： Hongbin Zhang , Yu Sun , Carl Davidson , Yi Cai
发明人： Hongbin Zhang , Yu Sun , Carl Davidson , Yi Cai
IPC分类号： H04J14/06 , H04B10/04 , H04J14/00
CPC分类号： H04B10/5561 , H04J14/06 , H04L5/04 , H04L25/03178 , H04L27/2096
摘要： An optical transmitter utilizing a multi-level data modulator to produce a PDM-QPSK signal, a one-bit delay interferometer configured to correlate the multi-level data modulated signal and an optical filter configured to combine the correlated multi-level data modulated signal with one or more neighboring signals prior to transmitting over one of a plurality of optical channels. The PDM-QPSK correlated signal is configured to reduce the signal spectrum thereby increasing spectral efficiency of the transmitted signal.
摘要翻译：一种利用多电平数据调制器产生PDM-QPSK信号的光发射机，配置成将多电平数据调制信号相关联的一位延迟干涉仪和配置成将相关多电平数据调制信号与一个或多个相邻信号在通过多个光学信道之一发送之前。 PDM-QPSK相关信号被配置为减少信号频谱，从而提高发射信号的频谱效率。

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