公开(公告)号：US20100138722A1

公开(公告)日：2010-06-03

申请号：US12326933

申请日：2008-12-03

申请人： James HARLEY ,  Kim B. ROBERTS ,  Han SUN

发明人： James HARLEY ,  Kim B. ROBERTS ,  Han SUN

IPC分类号： H03M13/17 ,  G06F11/08

CPC分类号： H03M13/336 ,  H03M13/333 ,  H04B10/611 ,  H04B10/6164

摘要： Methods and techniques are disclosed for correcting the effect of cycle slips in a coherent communications system. A signal comprising SYNC bursts having a predetermined periodicity and a plurality of known symbols at predetermined locations between successive SYNC bursts is received. The received signal is partitioned into data blocks. Each data block encompasses at least data symbols and a set of check symbols corresponding to the plurality of known symbols at predetermined locations between a respective pair of successive SYNC bursts in the signal. Each data block is processed to detect a cycle slip. When a cycle slip is detected, the set of check symbols of the data block are examined to identify a first slipped check symbol, and a phase correction applied to data symbols of the data block lying between the first slipped check symbol and an end of the data block.

摘要翻译： 公开了用于校正相干通信系统中循环滑移的影响的方法和技术。 接收包括具有预定周期的SYNC脉冲串和在连续SYNC脉冲串之间的预定位置处的多个已知符号的信号。 接收的信号被分割成数据块。 每个数据块在该信号中的相应的一对连续SYNC突发之间的预定位置处至少包含与多个已知符号对应的数据符号和一组校验符号。 处理每个数据块以检测周期滑移。 当检测到周期滑移时，检查数据块的校验符号集合以识别第一滑动校验符号，并且将相位校正应用于位于第一滑动校验符号和第一滑动校验符号的结束之间的数据块的数据符号 数据块。

公开(公告)号：US20170093528A1

公开(公告)日：2017-03-30

申请号：US15378834

申请日：2016-12-14

申请人： Shahab OVEIS GHARAN ,  James HARLEY ,  Kim B. ROBERTS

发明人： Shahab OVEIS GHARAN ,  James HARLEY ,  Kim B. ROBERTS

IPC分类号： H04L1/00 ,  H03M13/15 ,  H03M13/29 ,  G06F11/10

CPC分类号： H04L1/0063 ,  G06F11/10 ,  H03M13/152 ,  H03M13/2915 ,  H03M13/2918 ,  H03M13/2921 ,  H03M13/2945 ,  H03M13/2963 ,  H04L1/0045

摘要： Forward Error Correction technique: parity vectors are computed such that each parity vector spans multiple FEC frames; in a given FEC frame, a first set of syndrome bits are due to the parity vectors, and a second set of syndrome bits satisfy FEC equations that involve bits of the given FEC frame including the first set of syndrome bits; and the parity vectors are staggered with respect to any sequence in which the FEC frames are processed. Values of decoded bits of a first frame are deduced from known bits of a first parity vector having an effective length of one frame. For parity vectors having an effective length greater than one frame, a Log Likelihood Ratio of each unknown bit associated with the first frame is updated based on known and unknown bits of each parity vector. First frame is decoded using deduced bit values and updated LLR values.

公开(公告)号：US20160164632A1

公开(公告)日：2016-06-09

申请号：US14564195

申请日：2014-12-09

申请人： Shahab OVEIS GHARAN ,  James HARLEY ,  Kim B. ROBERTS

发明人： Shahab OVEIS GHARAN ,  James HARLEY ,  Kim B. ROBERTS

IPC分类号： H04L1/00 ,  G06F11/10

CPC分类号： H04L1/0063 ,  G06F11/10 ,  H03M13/152 ,  H03M13/2915 ,  H03M13/2918 ,  H03M13/2921 ,  H03M13/2945 ,  H03M13/2963 ,  H04L1/0045

摘要： In a Forward Error Correction (FEC) technique, parity vectors are computed such that: each parity vector spans a set of frames; a subset of bits of each frame is associated with parity bits in each parity vector; and a location of parity bits associated with one frame in one parity vector is different from that of parity bits associated with the frame in another parity vector. Values of decoded hits of a first frame are deduced from known parity bits of a first parity vector having an effective length of one frame. For parity vectors having, an effective length greater than one frame, a Log Likelihood Ratio of each unknown parity bit associated with the first frame is updated based on known and unknown parity bits of each parity valor. The first frame is decoded using the deduced bit values and the updated LLR values.

摘要翻译： 在前向纠错（FEC）技术中，计算奇偶校验向量，使得：每个奇偶校验向量跨越一组帧; 每个帧的比特的子集与每个奇偶校验向量中的奇偶校验位相关联; 并且与一个奇偶校验向量中的一帧相关联的奇偶校验位的位置与在另一个奇偶校验向量中与该帧相关联的奇偶校验位的位置不同。 从具有一帧的有效长度的第一奇偶校验向量的已知奇偶校验位推导第一帧的解码命中的值。 对于具有大于一帧的有效长度的奇偶校验向量，基于每个奇偶校验的已知和未知奇偶校验位来更新与第一帧相关联的每个未知奇偶校验位的对数似然比。 使用推导的比特值和更新的LLR值对第一帧进行解码。

公开(公告)号：US20170019183A1

公开(公告)日：2017-01-19

申请号：US15281986

申请日：2016-09-30

申请人： James HARLEY ,  Roger CARROLL ,  Shahab OVEIS GHARAN ,  Kim B. ROBERTS

发明人： James HARLEY ,  Roger CARROLL ,  Shahab OVEIS GHARAN ,  Kim B. ROBERTS

IPC分类号： H04B10/548 ,  H04J99/00 ,  H04B10/50 ,  H04B10/40 ,  H04B10/61

CPC分类号： H04B10/516 ,  H04B10/505 ,  H04B10/548 ,  H04B10/616

摘要： A transmitter comprises a complex mixer to generate a single I analog drive signal and a single Q analog drive signal, and a single multi-dimensional optical modulator configured to modulate an optical carrier light using the single I analog drive signal and the single Q analog drive signal to produce a modulated optical signal for transmission. Alternatively, a transmitter comprises a complex mixer to generate two I analog drive signals and two Q analog drive signals, and a single multi-dimensional multiple-electrode optical modulator configured to modulate an optical carrier light using the analog drive signals to produce a modulated optical signal for transmission. In both transmitters, the optical carrier light is produced by a single laser, and frequency components of the first data signal are located in a different portion of a spectrum of the modulated optical signal than frequency components of the second data signal.

摘要翻译： 发射机包括复合混频器以产生单个I模拟驱动信号和单个Q模拟驱动信号，并且单个多维光学调制器被配置为使用单个I模拟驱动信号和单个Q模拟驱动器来调制光载波 信号以产生用于传输的调制光信号。 或者，发射机包括复合混频器以产生两个I模拟驱动信号和两个Q模拟驱动信号，以及单个多维多电极光调制器，其被配置为使用模拟驱动信号来调制光载波光以产生调制光 传输信号。 在两个发射机中，光载波光由单个激光器产生，并且第一数据信号的频率分量位于调制光信号的频谱的不同部分，而不是第二数据信号的频率分量。

公开(公告)号：US20140169793A1

公开(公告)日：2014-06-19

申请号：US13718211

申请日：2012-12-18

申请人： James HARLEY ,  Roger CARROLL ,  Shahab OVEIS GHARAN ,  Kim B. ROBERTS

发明人： James HARLEY ,  Roger CARROLL ,  Shahab OVEIS GHARAN ,  Kim B. ROBERTS

IPC分类号： H04B10/516

CPC分类号： H04B10/516 ,  H04B10/505 ,  H04B10/548 ,  H04B10/616

摘要： A method of transmitting a data signal in an optical communications system. The method includes processing the data signal to generate an analog drive signal, wherein the processing comprises applying a first non-linear operation such that frequency components of the drive signal lay in at least two separated spectral bands. An optical carrier light is modulated using the analog drive signal.

摘要翻译： 一种在光通信系统中发送数据信号的方法。 该方法包括处理数据信号以产生模拟驱动信号，其中该处理包括施加第一非线性操作，使得驱动信号的频率分量位于至少两个分离的频谱带中。 使用模拟驱动信号调制光载波。

公开(公告)号：US20130209089A1

公开(公告)日：2013-08-15

申请号：US13371846

申请日：2012-02-13

申请人： James HARLEY ,  Douglas MCGHAN ,  Shahab OVEIS GHARAN ,  Kim B. ROBERTS ,  Mark ROLLINS

发明人： James HARLEY ,  Douglas MCGHAN ,  Shahab OVEIS GHARAN ,  Kim B. ROBERTS ,  Mark ROLLINS

IPC分类号： H04B10/06 ,  H04B10/08 ,  H04B10/04

CPC分类号： H04B10/5561

摘要： A transmitter in an optical communications system includes a digital signal processor for processing a data signal to generate a sample stream encoding successive symbols in accordance with a constrained phase modulation scheme having a constellation of at least two symbols and a modulation phase constrained to a phase range spanning less than 4π. A digital-to-analog converter converts the sample stream into a corresponding analog drive signal. A finite range phase modulator modulates a phase of a continuous wavelength channel light in accordance with the analog drive signal, to generate a modulated channel light for transmission through the optical communications system. A receiver in the optical communications system includes an optical stage for detecting phase and amplitude of the modulated channel light and for generating a corresponding sample stream, and a digital signal processor for processing the sample stream to estimate each successive symbol of the modulated channel light.

摘要翻译： 光通信系统中的发射机包括数字信号处理器，用于处理数据信号以产生根据具有至少两个符号的星座的约束相位调制方案编码连续码元的采样流，以及限制为相位范围的调制相位 跨度小于4pi。 数模转换器将采样流转换成相应的模拟驱动信号。 有限范围相位调制器根据模拟驱动信号调制连续波长信道光的相位，以产生用于通过光通信系统传输的调制信道光。 光通信系统中的接收机包括用于检测调制信道光的相位和幅度并用于产生相应样本流的光学级，以及用于处理样本流以估计调制信道光的每个连续符号的数字信号处理器。

公开(公告)号：US20110222854A1

公开(公告)日：2011-09-15

申请号：US13047356

申请日：2011-03-14

申请人： Kim B. ROBERTS ,  James HARLEY

发明人： Kim B. ROBERTS ,  James HARLEY

IPC分类号： H04J14/02

CPC分类号： H04J14/002 ,  H04B10/532 ,  H04B10/548 ,  H04L27/2633 ,  H04L27/2636 ,  H04L27/2697

摘要： An optical communications system includes a hub modem and a set of two or more remote modems. Each remote modem includes a transmitter stage for transmitting a respective uplink data stream within a selected one of a set of two or more sub-channels. The hub modem optically communicates with the set of remote modems. The hub modem includes a receiver stage having an optical front-end for receiving an uplink optical channel signal within a spectral range that encompasses the set of two or more spectral sub-bands; a photodetector for detecting modulation components of the received uplink optical channel signal and for generating a corresponding high bandwidth analog signal; and a digital signal processor for processing the high bandwidth analog signal to recover the respective uplink data stream transmitted by each remote modem.

摘要翻译： 光通信系统包括集线器调制解调器和一组两个或多个远程调制解调器。 每个远程调制解调器包括用于在一组两个或更多个子信道中选择的一个中发送相应上行链路数据流的发射机级。 集线器调制解调器与远程调制解调器集合光学通信。 集线器调制解调器包括具有光学前端的接收机级，用于在包含两组或更多个频谱子带的频谱范围内接收上行链路光信道信号; 用于检测所接收的上行链路光信道信号的调制分量并产生相应的高带宽模拟信号的光电检测器; 以及用于处理高带宽模拟信号以恢复由每个远程调制解调器发送的相应上行链路数据流的数字信号处理器。

公开(公告)号：US20160028481A1

公开(公告)日：2016-01-28

申请号：US14810135

申请日：2015-07-27

申请人： Kim B. ROBERTS ,  Han SUN

发明人： Kim B. ROBERTS ,  Han SUN

IPC分类号： H04B10/2569 ,  H04B10/532 ,  H04B10/69

CPC分类号： H04B10/6971 ,  H04B10/2569 ,  H04B10/2572 ,  H04B10/532 ,  H04B10/677

摘要： A signal equalizer for compensating impairments of an optical signal received through a link of a high speed optical communications network. At least one set of compensation vectors are computed for compensating at least two distinct types of impairments. A frequency domain processor is coupled to receive respective raw multi-bit in-phase (I) and quadrature (Q) sample streams of each received polarization of the optical signal. The frequency domain processor operates to digitally process the multi-bit sample streams, using the compensation vectors, to generate multi-bit estimates of symbols modulated onto each transmitted polarization of the optical signal. The frequency domain processor exhibits respective different responses to each one of the at least two distinct types of impairments.

公开(公告)号：US20100092181A1

公开(公告)日：2010-04-15

申请号：US12642948

申请日：2009-12-21

申请人： Kim B. ROBERTS ,  Kuang Tsan WU ,  Maurice O'SULLIVAN ,  Han SUN

发明人： Kim B. ROBERTS ,  Kuang Tsan WU ,  Maurice O'SULLIVAN ,  Han SUN

IPC分类号： H04B10/00 ,  H04B10/04

CPC分类号： H04B10/6161 ,  H04B10/60 ,  H04B10/611 ,  H04B10/6162 ,  H04B10/6971 ,  H04L27/2601 ,  H04L2025/03414 ,  H04L2025/03522

摘要： A method of suppressing effects of aliasing in a system for digitally processing a high speed signal having a symbol rate of 1/T. The high speed signal is sampled at a fractional multiple (N) of the symbol rate, wherein 1

摘要翻译： 抑制用于数字处理符号率为1 / T的高速信号的系统中的混叠效应的方法。 以符号率的分数倍（N）对高速信号进行采样，其中1

公开(公告)号：US20120063786A1

公开(公告)日：2012-03-15

申请号：US13288375

申请日：2011-11-03

申请人： Han SUN ,  Kuang Tsan WU ,  Kim B. ROBERTS

发明人： Han SUN ,  Kuang Tsan WU ,  Kim B. ROBERTS

IPC分类号： H04B10/00

CPC分类号： H03L7/0812 ,  H04B10/695 ,  H04L7/0087 ,  H04L7/0278

摘要： In a coherent optical receiver of an optical communications network, a method of recovering a clock signal from a high speed optical signal received through an optical link. A set of compensation vectors are adaptively computed for compensating Inter-symbol Interference (ISI) due to at least polarization impairments of the optical signal. A channel delay is estimated based on the computed compensation vectors. The estimated channel delay is subtracted from the computed compensation vectors to generate corresponding modified compensation vectors. Finally, the modified compensation vectors are used to derive a recovered clock signal.

摘要翻译： 在光通信网络的相干光接收机中，从通过光链路接收的高速光信号中恢复时钟信号的方法。 自适应地计算一组补偿矢量，用于补偿因至少光学信号的偏振损伤而引起的符号间干扰（ISI）。 基于所计算的补偿向量来估计信道延迟。 从所计算的补偿向量中减去估计的信道延迟，以产生相应的修改的补偿向量。 最后，修正的补偿向量用于导出恢复的时钟信号。