公开(公告)号：US20140133865A1

公开(公告)日：2014-05-15

申请号：US13969694

申请日：2013-08-19

申请人： Michael Andrew REIMER ,  Andrew D. SHINER ,  Shahab OVEIS GHARAN ,  Mahmoud TAHERZADEHBOROUJENI ,  Maurice O'SULLIVAN ,  Kim B. ROBERTS

发明人： Michael Andrew REIMER ,  Andrew D. SHINER ,  Shahab OVEIS GHARAN ,  Mahmoud TAHERZADEHBOROUJENI ,  Maurice O'SULLIVAN ,  Kim B. ROBERTS

IPC分类号： H04B10/532

CPC分类号： H04B10/532 ,  H04B10/516

摘要： A method of transmitting a data signal using an optical transmitter of an optical communications system. The optical transmitter is configured to modulate an optical carrier in successive signalling intervals to generate an optical signal. A modulation scheme is provided which comprises a multi-dimensional symbol constellation. The modulation scheme is designed such that an average degree of polarization of a modulated optical signal output from the optical transmitter has a first value when averaged across a first signalling interval, and has a second value when averaged across more than one and fewer than 100 signalling intervals. The second value is less than 10 percent of the first value. During run-time, an encoder of the optical transmitter encoding a data signal to be transmitted as symbols of the constellation, and a modulator of the optical transmitter modulating available dimensions of the optical carrier in accordance with the symbols.

摘要翻译： 一种使用光通信系统的光发射机发送数据信号的方法。 光发射机被配置为在连续的信令间隔中调制光载波以产生光信号。 提供了一种包括多维符号星座的调制方案。 调制方案被设计成使得当从第一信令间隔平均时，从光发送器输出的调制光信号的平均偏振度具有第一值，并且当平均多于一个且少于100个信令时具有第二值 间隔 第二个值小于第一个值的10％。 在运行时间期间，光发送器的编码器编码要作为星座符号发送的数据信号，以及根据符号调制光载波的可用尺寸的光发射机的调制器。

公开(公告)号：US09143238B2

公开(公告)日：2015-09-22

申请号：US13969694

申请日：2013-08-19

申请人： Kim B. Roberts ,  Maurice O'Sullivan ,  Mahmoud Taherzadehboroujeni ,  Shahab Oveis Gharan ,  Andrew D. Shiner ,  Michael Andrew Reimer

发明人： Kim B. Roberts ,  Maurice O'Sullivan ,  Mahmoud Taherzadehboroujeni ,  Shahab Oveis Gharan ,  Andrew D. Shiner ,  Michael Andrew Reimer

IPC分类号： H04B10/04 ,  H04B10/00 ,  H04B10/532 ,  H04B10/516

CPC分类号： H04B10/532 ,  H04B10/516

摘要： A method of transmitting a data signal using an optical transmitter of an optical communications system. The optical transmitter is configured to modulate an optical carrier in successive signalling intervals to generate an optical signal. A modulation scheme is provided which comprises a multi-dimensional symbol constellation. The modulation scheme is designed such that an average degree of polarization of a modulated optical signal output from the optical transmitter has a first value when averaged across a first signaling interval, and has a second value when averaged across more than one and fewer than 100 signaling intervals. The second value is less than 10 percent of the first value. During run-time, an encoder of the optical transmitter encoding a data signal to be transmitted as symbols of the constellation, and a modulator of the optical transmitter modulating available dimensions of the optical carrier in accordance with the symbols.

摘要翻译： 一种使用光通信系统的光发射机发送数据信号的方法。 光发射机被配置为在连续的信令间隔中调制光载波以产生光信号。 提供了一种包括多维符号星座的调制方案。 调制方案被设计成使得当从第一信令间隔平均时，从光发送器输出的调制光信号的平均偏振度具有第一值，并且当平均多于一个且少于100个信令时具有第二值 间隔 第二个值小于第一个值的10％。 在运行时间期间，光发送器的编码器编码要作为星座符号发送的数据信号，以及根据符号调制光载波的可用尺寸的光发射机的调制器。

公开(公告)号：US09667348B1

公开(公告)日：2017-05-30

申请号：US13495630

申请日：2012-06-13

申请人： Kim B. Roberts ,  Shahab Oveis Gharan ,  William Martin Snelgrove ,  Mahmoud Taherzadehboroujeni

发明人： Kim B. Roberts ,  Shahab Oveis Gharan ,  William Martin Snelgrove ,  Mahmoud Taherzadehboroujeni

IPC分类号： H03K9/00 ,  H04B10/60 ,  H04L27/00 ,  H04L25/00

CPC分类号： H04B10/60 ,  H04B10/616 ,  H04L25/00 ,  H04L27/00 ,  H04L27/265

摘要： A receiver of an optical communications system includes a set of two or more analog-to digital A/D converters, a respective transform block connected to an output of each A/D converter, and a summation block. Each A/D converter samples a respective low-bandwidth analog signal comprising a respective portion of a high-bandwidth data signal. Each transform block calculates a set of spectral components of the respective low-bandwidth analog signal. The summation block combines respective spectral components calculated by each transform block to construct spectral terms of a combined signal having a spectrum corresponding to that of the high-bandwidth data signal.

公开(公告)号：US09071362B1

公开(公告)日：2015-06-30

申请号：US13655497

申请日：2012-10-19

申请人： Mahmoud Taherzadehboroujeni ,  Shahab Oveis Gharan ,  Kim B. Roberts

发明人： Mahmoud Taherzadehboroujeni ,  Shahab Oveis Gharan ,  Kim B. Roberts

IPC分类号： H04B10/04 ,  H04B10/516

CPC分类号： H04B10/516 ,  H04B10/5161 ,  H04B10/532 ,  H04B10/5561

摘要： A method of transmitting data. The method comprises preliminarily providing a modulation scheme comprising an N-symbol constellation defined in an M-dimensional space, wherein N

摘要翻译： 一种传输数据的方法。 该方法包括预先提供包括在M维空间中定义的N符号星座的调制方案，其中N <2M，并且星座内给定的一对符号之间的复合距离随着在编码的数据字之间的汉明距离的增加而增加 每个符号。 在运行时间期间，要发送的数据信号被编码为星座的符号，并且根据符号被调制到载波的至少M个维度上。

公开(公告)号：US20160204902A1

公开(公告)日：2016-07-14

申请号：US15078189

申请日：2016-03-23

申请人： Shahab OVEIS GHARAN ,  Kim B. ROBERTS ,  Mahmoud TAHERZADEHBOROUJENI

发明人： Shahab OVEIS GHARAN ,  Kim B. ROBERTS ,  Mahmoud TAHERZADEHBOROUJENI

IPC分类号： H04L1/00 ,  H04B10/61

CPC分类号： H04B10/695 ,  H04B10/612 ,  H04B10/613 ,  H04B10/614 ,  H04B10/616 ,  H04B10/697 ,  H04L1/0054

摘要： In a coherent receiver of an optical communication system, a method of processing a detected symbol estimate to determine a most likely value of a corresponding transmitted data word, the transmitted data word comprising one or more data bits encoded in a transmitter using a predetermined constellation of at least two symbols. A set of two or more virtual constellation points are define in a decision region corresponding to a possible value of the data word. The detected symbol estimate is processed to find a most likely virtual constellation point given the detected symbol estimate. The most likely value of the corresponding transmitted data word is determined based on the most likely virtual constellation point.

摘要翻译： 在光通信系统的相干接收机中，处理检测到的符号估计以确定对应的发送数据字的最可能值的方法，所发送的数据字包括使用预定的星座图的发送机中编码的一个或多个数据比特 至少两个符号。 在与数据字的可能值相对应的判定区域中定义一组两个或更多个虚拟星座点。 处理检测到的符号估计以找到给定检测到的符号估计的最可能的虚拟星座点。 基于最可能的虚拟星座点来确定对应的传输数据字的最可能的值。

公开(公告)号：US08818209B1

公开(公告)日：2014-08-26

申请号：US13526965

申请日：2012-06-19

申请人： William Martin Snelgrove ,  Kim B. Roberts ,  Bertram Leesti ,  Shahab Oveis Gharan ,  Mahmoud Taherzadehboroujeni

发明人： William Martin Snelgrove ,  Kim B. Roberts ,  Bertram Leesti ,  Shahab Oveis Gharan ,  Mahmoud Taherzadehboroujeni

IPC分类号： H04B10/06

CPC分类号： H04B10/616

摘要： A frequency decimation block for processing an analog input signal including a high-bandwidth data signal to generate a parallel set of parallel output signals, in which each output signal represents a respective portion of the high-bandwidth data signal. A preamplifier is provided for amplifying the input signal. A frequency domain divider divides the amplified input signal to generate a set of frequency band signals including a low frequency band signal, a mid-frequency band signal, and a high frequency band signal. Each frequency band signal is supplied to at least one signal path. A respective non-linear processor is connected in each of M signal paths processes the input signal using a respective branch signal to yield a corresponding composite signal. A respective Low-Pass Filter (LPF) is connected in each signal path, for low-pass filtering at least the composite signals to generate corresponding ones of the parallel output signals.

摘要翻译： 一种用于处理包括高带宽数据信号的模拟输入信号以产生并行的并行输出信号的频率抽取块，其中每个输出信号表示高带宽数据信号的相应部分。 提供用于放大输入信号的前置放大器。 频域分频器对放大的输入信号进行分频，以产生包括低频带信号，中频带信号和高频带信号的一组频带信号。 每个频带信号被提供给至少一个信号路径。 在M个信号路径的每一个中连接相应的非线性处理器，使用相应的分支信号处理输入信号，以产生相应的复合信号。 相应的低通滤波器（LPF）连接在每个信号路径中，用于至少对复合信号进行低通滤波以产生对应的并行输出信号。

公开(公告)号：US08588326B2

公开(公告)日：2013-11-19

申请号：US11631842

申请日：2005-07-07

申请人： Mahmoud Taherzadehboroujeni ,  Hosein Nikopourdeilami ,  Amir Keyvan Khandani ,  Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Dong-Sheng Yu ,  Jianglei Ma

发明人： Mahmoud Taherzadehboroujeni ,  Hosein Nikopourdeilami ,  Amir Keyvan Khandani ,  Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Dong-Sheng Yu ,  Jianglei Ma

IPC分类号： H04B7/24 ,  H04B7/00 ,  H04L27/00 ,  H04L27/04

CPC分类号： H04B7/0669 ,  H04B7/0413 ,  H04B7/06 ,  H04B7/0697 ,  H04B7/0891 ,  H04L1/0606 ,  H04L1/0625 ,  H04L1/0643 ,  H04L1/0668 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L27/2626

摘要： Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided. Variable rate codes are provided that combine various fixed rate codes in a manner that results in codes whose rates are dependent on all the various fixed rate codes that are combined.

摘要翻译： 为具有奇数和偶数个发射天线的MIMO OFDM发射机和接收机提供了方法和设备。 描述了用于在空间时间编码（STC）之前预编码信息比特的各种方法，以使得能够在所有天线上传输信息比特。 对已经被预编码和STC编码的接收信号进行解码的方法也由本发明的实施例提供。 还提供了用于三个发射天线发射机的基站与一个或多个无线终端之间的下行链路和上行链路传输的导频模式。 提供了可变速率代码，其以导致其速率取决于组合的所有各种固定速率代码的代码的方式组合各种固定速率代码。

公开(公告)号：US09325427B1

公开(公告)日：2016-04-26

申请号：US13664576

申请日：2012-10-31

申请人： Shahab Oveis Gharan ,  Kim B. Roberts ,  Mahmoud Taherzadehboroujeni

发明人： Shahab Oveis Gharan ,  Kim B. Roberts ,  Mahmoud Taherzadehboroujeni

IPC分类号： H04B10/69 ,  H04B10/61

CPC分类号： H04B10/695 ,  H04B10/612 ,  H04B10/613 ,  H04B10/614 ,  H04B10/616 ,  H04B10/697 ,  H04L1/0054

摘要： In a coherent receiver of an optical communication system, a method of processing a detected symbol estimate to determine a most likely value of a corresponding transmitted data word, the transmitted data word comprising one or more data bits encoded in a transmitter using a predetermined constellation of at least two symbols. A set of two or more virtual constellation points are define in a decision region corresponding to a possible value of the data word. The detected symbol estimate is processed to find a most likely virtual constellation point given the detected symbol estimate. The most likely value of the corresponding transmitted data word is determined based on the most likely virtual constellation point.

摘要翻译： 在光通信系统的相干接收机中，处理检测到的符号估计以确定对应的发送数据字的最可能值的方法，所发送的数据字包括使用预定的星座图的发送机中编码的一个或多个数据比特 至少两个符号。 在与数据字的可能值相对应的判定区域中定义一组两个或更多个虚拟星座点。 处理检测到的符号估计以找到给定检测到的符号估计的最可能的虚拟星座点。 基于最可能的虚拟星座点来确定对应的传输数据字的最可能的值。

公开(公告)号：US20140369680A1

公开(公告)日：2014-12-18

申请号：US13917339

申请日：2013-06-13

申请人： Shahab OVEIS GHARAN ,  Kim B. ROBERTS ,  Akbar GHASEMI ,  Mahmoud TAHERZADEHBOROUJENI

发明人： Shahab OVEIS GHARAN ,  Kim B. ROBERTS ,  Akbar GHASEMI ,  Mahmoud TAHERZADEHBOROUJENI

IPC分类号： H04L1/00 ,  H04B10/079 ,  H04B10/516 ,  H04L1/20

CPC分类号： H04L1/0042 ,  H04B10/5055 ,  H04B10/516 ,  H04L1/0003 ,  H04L1/206 ,  H04L27/3405

摘要： A method of transmitting a data signal using an optical transmitter of an optical communications system. A first encoder processes an N-bit input vector in accordance with a first mapping to generate a corresponding M-bit data stream. A Forward Error Correction encoder processes the M-bit data stream in accordance with a predetermined FEC encoding scheme to generate an encoded signal. A constellation mapper maps the encoded signal to symbol values in accordance with a predetermined modulation scheme to generate a corresponding symbol stream. A modulator modulates a carrier light in accordance with the encoded symbol stream to generate an optical signal for transmission through the optical communications system. The first mapping can be adjusted to maximize performance of the optical communications system.

摘要翻译： 一种使用光通信系统的光发射机发送数据信号的方法。 第一编码器根据第一映射处理N位输入向量以生成相应的M位数据流。 前向纠错编码器根据预定的FEC编码方案处理M位数据流，以产生编码信号。 星座映射器根据预定的调制方案将经编码的信号映射到符号值，以产生相应的符号流。 调制器根据编码符号流调制载波，以产生用于通过光通信系统传输的光信号。 可以调整第一映射以最大化光通信系统的性能。

公开(公告)号：US20130089342A1

公开(公告)日：2013-04-11

申请号：US13689117

申请日：2012-11-29

申请人： Shahab OVEIS GHARAN ,  Kim B. ROBERTS ,  Mahmoud TAHERZADEHBOROUJENI ,  Amir KHANDANI ,  Akbar GHASEMI

发明人： Shahab OVEIS GHARAN ,  Kim B. ROBERTS ,  Mahmoud TAHERZADEHBOROUJENI ,  Amir KHANDANI ,  Akbar GHASEMI

IPC分类号： H04B10/06

CPC分类号： H04B10/6165

摘要： A method of data symbol recovery. An optical signal is modulated by a transmitter using a modulation scheme comprising a symbol constellation having a predetermined asymmetry and detected at a receiver. Phase error estimates corresponding to data symbol estimates detected from the received optical signal are calculated. A phase rotation is calculated based on the phase error estimates, using a filter function, and the phase rotation applied to at least one data symbol estimate to generate a corresponding rotated symbol estimate. The phase error estimates model the asymmetry of the symbol constellation, such that the computed phase rotation can compensate phase noise that is greater than one decision region of the symbol constellation.

摘要翻译： 数据符号恢复的方法。 光信号由发射机使用包括具有预定不对称性并在接收机处检测的符号星座的调制方案来调制。 计算对应于从接收的光信号检测的数据符号估计的相位误差估计。 基于使用滤波函数的相位误差估计和施加到至少一个数据符号估计的相位旋转来计算相位旋转以生成相应的旋转符号估计。 相位误差估计模拟符号星座的不对称性，使得所计算的相位旋转可以补偿大于符号星座的一个决定区域的相位噪声。