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1. 发明授权

US09602151B1 Apparatus and method for transmitting and receiving wireless signals subject to a spectral mask 有权
公开(公告)号：US09602151B1
公开(公告)日：2017-03-21
申请号：US14840457
申请日：2015-08-31
申请人： Mahdi Zamani , Ahikam Aharony , Zhuhong Zhang , Chuandong Li , Weikun Hou
发明人： Mahdi Zamani , Ahikam Aharony , Zhuhong Zhang , Chuandong Li , Weikun Hou
IPC分类号： H03H7/30 , H04B1/10 , H04L5/00 , H04L27/26 , H04L27/00
CPC分类号： H04B1/40 , H04L27/0014 , H04L27/32
摘要： Provided is an apparatus and method for transmitting and receiving wireless signals. A transmitting apparatus has a signal processor and a transmitter. The signal processor is configured to generate a signal having a middle channel and at least one side channel. The transmitter is configured to wirelessly transmit the signal subject to a spectral mask that has shoulder regions. According to an embodiment of the invention, the signal processor generates the signal such that each side channel is positioned in one of the shoulder regions of the spectral mask. In this manner, bandwidth from the shoulder regions can be utilized by one or more side channels. Also provided is a receiving apparatus having a receiver configured to wirelessly receive the signal, and a signal processor configured to process the signal.

2. 发明申请

US20160218887A1 METHOD AND APPARATUS WITH IMPROVED ESTIMATION ACCURACY AND ROBUSTNESS FOR FINE FREQUENCY OFFSET ESTIMATION IN COHERENT RECEIVERS 有权
标题翻译：具有改进的估计精度和稳健性的方法和装置，用于在相邻接收器中精细频偏估计
公开(公告)号：US20160218887A1
公开(公告)日：2016-07-28
申请号：US14978380
申请日：2015-12-22
申请人： Mahdi Zamani , Zhuhong Zhang , Chuandong Li
发明人： Mahdi Zamani , Zhuhong Zhang , Chuandong Li
IPC分类号： H04L25/02
CPC分类号： H04L25/024 , H04B10/6164 , H04B10/6165 , H04L27/0014 , H04L27/2271 , H04L27/3827 , H04L2027/0038 , H04L2027/0057 , H04L2027/0085
摘要： The present disclosure provides a method and system for fine estimation of a local oscillator frequency offset of a received signal at a coherent receiver, by evaluating the probability mass function (PMF) of the signal phase of output symbols at different frequencies. At frequencies other than the actual frequency offset, the signal phase is uniformly distributed in [-π,π] such that the summation of a function of PMF values where the function is convex or concave between 0 and 1 can be utilized to determine an a frequency offset to be used by the coherent receiver.
摘要翻译：本公开提供了一种用于通过评估不同频率处的输出符号的信号相位的概率质量函数（PMF）来精细估计相干接收机处的接收信号的本地振荡器频率偏移的方法和系统。在实际频率偏移以外的频率下，信号相位均匀分布在[-π，π]中，使得功能在0和1之间的凸起或凹入的PMF值的函数的总和可用于确定a 频率偏移由相干接收机使用。

3. 发明申请

US20160204871A1 METHOD AND SYSTEM FOR DISCRETE MULTI-TONE TRANSMISSION WITH MULTIPLE MODULATIONS 有权
标题翻译：用多种调制方式进行离散多路传输的方法与系统
公开(公告)号：US20160204871A1
公开(公告)日：2016-07-14
申请号：US14596875
申请日：2015-01-14
申请人： Chuandong Li , Zhuhong Zhang , Mahdi Zamani
发明人： Chuandong Li , Zhuhong Zhang , Mahdi Zamani
IPC分类号： H04B10/516
CPC分类号： H04B10/5161 , H04L27/2601
摘要： Optical network devices and method for optical network communications in discrete multi-tone (DMT) are provided. A serial information signal is converted to groups of bits and loaded to parallel processing branches based on bit rates of the parallel processing branches. Each branch is configured to encode the associated group of data bits on the associated tone. A first bit rate and modulation and power allocation to a first branch of the branches may be different from a second bit rate and modulation and power allocation to a second branch of the branches. To recover the incoming data, the encoded signal may be parallel-processed using branches with different demodulation formats and provide the serial data stream.
摘要翻译：提供了离散多音（DMT）光网络通信的光网络设备和方法。基于并行处理分支的比特率，将串行信息信号转换为比特组并加载到并行处理分支。每个分支被配置为对相关联音调上的相关联的数据位组进行编码。对分支的第一分支的第一比特率和调制和功率分配可以不同于第二比特率以及对分支的第二分支的调制和功率分配。为了恢复输入数据，编码信号可以使用具有不同解调格式的分支并行处理并提供串行数据流。

4. 发明授权

US09787408B2 Apparatus and method for unified mitigation of correlative additive and multiplicative noise 有权
公开(公告)号：US09787408B2
公开(公告)日：2017-10-10
申请号：US14876459
申请日：2015-10-06
申请人： Mahdi Zamani , Jeebak Mitra , Zhuhong Zhang , Chuandong Li , Hossein Najafi , Demin Yao
发明人： Mahdi Zamani , Jeebak Mitra , Zhuhong Zhang , Chuandong Li , Hossein Najafi , Demin Yao
IPC分类号： H04B10/61 , H04L1/00 , H04L25/03
CPC分类号： H04B10/6165 , H04B10/616 , H04L1/0054 , H04L25/03178
摘要： A digital signal processing method and apparatus is described. The digital processing apparatus comprises a coarse carrier recovery module for performing a coarse carrier compensation of a received modulated signal; and a trellis-based equalization module selectable between a first mode for performing a trellis-based equalization to compensate a residual inter-symbol interference of the received modulated signal and a second mode for performing a trellis-based equalization to compensate a residual phase noise of the received modulated signal.

5. 发明授权

US09749056B2 Method and system for discrete multi-tone transmission with multiple modulations 有权
公开(公告)号：US09749056B2
公开(公告)日：2017-08-29
申请号：US14596875
申请日：2015-01-14
申请人： Chuandong Li , Zhuhong Zhang , Mahdi Zamani
发明人： Chuandong Li , Zhuhong Zhang , Mahdi Zamani
IPC分类号： H04B10/11 , H04B10/516 , H04L27/26
CPC分类号： H04B10/5161 , H04L27/2601
摘要： Optical network devices and method for optical network communications in discrete multi-tone (DMT) are provided. A serial information signal is converted to groups of bits and loaded to parallel processing branches based on bit rates of the parallel processing branches. Each branch is configured to encode the associated group of data bits on the associated tone. A first bit rate and modulation and power allocation to a first branch of the branches may be different from a second bit rate and modulation and power allocation to a second branch of the branches. To recover the incoming data, the encoded signal may be parallel-processed using branches with different demodulation formats and provide the serial data stream.

6. 发明申请

US20170099112A1 Apparatus and Method for Unified Mitigation of Correlative Additive and Multiplicative Noise 有权
公开(公告)号：US20170099112A1
公开(公告)日：2017-04-06
申请号：US14876459
申请日：2015-10-06
申请人： Mahdi Zamani , Jeebak Mitra , Zhuhong Zhang , Chuandong Li , Hossein Najafi , Demin Yao
发明人： Mahdi Zamani , Jeebak Mitra , Zhuhong Zhang , Chuandong Li , Hossein Najafi , Demin Yao
IPC分类号： H04B10/61
CPC分类号： H04B10/6165 , H04B10/616 , H04L1/0054 , H04L25/03178
摘要： A digital signal processing method and apparatus is described. The digital processing apparatus comprises a coarse carrier recovery module for performing a coarse carrier compensation of a received modulated signal; and a trellis-based equalization module selectable between a first mode for performing a trellis-based equalization to compensate a residual inter-symbol interference of the received modulated signal and a second mode for performing a trellis-based equalization to compensate a residual phase noise of the received modulated signal.

7. 发明授权

US09537683B1 Method and apparatus for residual phase noise compensation 有权
标题翻译：残余相位噪声补偿方法和装置
公开(公告)号：US09537683B1
公开(公告)日：2017-01-03
申请号：US14876246
申请日：2015-10-06
申请人： Mahdi Zamani , Hossein Najafi , Demin Yao , Jeebak Mitra , Chuandong Li , Zhuhong Zhang
发明人： Mahdi Zamani , Hossein Najafi , Demin Yao , Jeebak Mitra , Chuandong Li , Zhuhong Zhang
IPC分类号： H03D1/00 , H04L27/06 , H04L25/03 , H04L27/26
CPC分类号： H04L25/03273 , H04L25/03203 , H04L27/0014 , H04L27/2275 , H04L27/3836 , H04L2027/0038
摘要： A method and apparatus for performing residual phase noise compensation is described. A coarse carrier compensation of a received modulated signal is performed to obtain a coarse carrier compensated signal and a trellis-based residual carrier recovery is performed to estimate a residual phase noise of the coarse carrier compensated signal. The coarse carrier compensated signal is compensated based on the estimated residual phase noise.
摘要翻译：描述了执行剩余相位噪声补偿的方法和装置。执行接收的调制信号的粗略载波补偿以获得粗略的载波补偿信号，并且执行基于网格的残余载波恢复以估计粗略载波补偿信号的残余相位噪声。基于估计的残余相位噪声补偿粗略载波补偿信号。

8. 发明申请

US20130272704A1 Linear Dispersion Polarization-Time Codes and Equalization in Polarization Multiplexed Coherent Optical System 有权
标题翻译：线性色散偏振时间码和极化复用相干光学系统中的均衡
公开(公告)号：US20130272704A1
公开(公告)日：2013-10-17
申请号：US13601360
申请日：2012-08-31
申请人： Mahdi Zamani , Chuandong Li , Zhuhong Zhang
发明人： Mahdi Zamani , Chuandong Li , Zhuhong Zhang
IPC分类号： H04J14/06
CPC分类号： H04J14/06 , H04B10/5055 , H04B10/532 , H04J14/02 , H04L27/2697
摘要： A method of optical communication comprising encoding four modulated symbols to generate four encoded symbols in two orthogonal polarizations and transmitting the four encoded symbols in two successive time slots. An optical communication apparatus comprising a processor configured to receive two sequences of digital symbols in a plurality of time slots, wherein the two sequences correspond to two components of two orthogonal polarizations, wherein one digital symbol per polarization is received in each of the plurality of time slots, divide each of the two sequences into a plurality of groups using a modulo operation of time, wherein each group comprises two digital symbols received in two consecutive time slots, and adaptively equalize the four digital symbols of the two consecutive time slots using a 4×4 matrix to generate four modulated symbols, wherein the 4×4 matrix comprises 16 tap-vectors.
摘要翻译：一种光通信方法，包括编码四个调制符号以在两个正交偏振中产生四个编码符号，并在两个连续的时隙中发送四个编码符号。一种光通信设备，包括被配置为在多个时隙中接收两个数字符号序列的处理器，其中两个序列对应于两个正交偏振的两个分量，其中在多个时间的每一个中接收每个极化的一个数字符号时隙，使用时间的模运算将两个序列中的每一个划分为多个组，其中每个组包括在两个连续时隙中接收的两个数字符号，并且使用4个时隙自适应地均衡两个连续时隙的四个数字符号 ×4矩阵以生成四个调制符号，其中4×4矩阵包括16个抽头矢量。

9. 发明授权

US09497048B2 Method and apparatus with improved estimation accuracy and robustness for fine frequency offset estimation in coherent receivers 有权
标题翻译：具有改进的相干接收机精细频率偏移估计的估计精度和鲁棒性的方法和装置
公开(公告)号：US09497048B2
公开(公告)日：2016-11-15
申请号：US14978380
申请日：2015-12-22
申请人： Mahdi Zamani , Zhuhong Zhang , Chuandong Li
发明人： Mahdi Zamani , Zhuhong Zhang , Chuandong Li
IPC分类号： H04L25/02
CPC分类号： H04L25/024 , H04B10/6164 , H04B10/6165 , H04L27/0014 , H04L27/2271 , H04L27/3827 , H04L2027/0038 , H04L2027/0057 , H04L2027/0085
摘要： The present disclosure provides a method and system for fine estimation of a local oscillator frequency offset of a received signal at a coherent receiver, by evaluating the probability mass function (PMF) of the signal phase of output symbols at different frequencies. At frequencies other than the actual frequency offset, the signal phase is uniformly distributed in [−π,π] such that the summation of a function of PMF values where the function is convex or concave between 0 and 1 can be utilized to determine an a frequency offset to be used by the coherent receiver.
摘要翻译：本公开提供了一种用于通过评估不同频率处的输出符号的信号相位的概率质量函数（PMF）来精细估计相干接收机处的接收信号的本地振荡器频率偏移的方法和系统。在实际频率偏移以外的频率下，信号相位均匀分布在[-π，π]中，使得功能在0和1之间的凸起或凹入的PMF值的函数的总和可用于确定a 频率偏移由相干接收机使用。

10. 发明授权

US09236973B2 Linear dispersion polarization-time codes and equalization in polarization multiplexed coherent optical system 有权
公开(公告)号：US09236973B2
公开(公告)日：2016-01-12
申请号：US13601360
申请日：2012-08-31
申请人： Mahdi Zamani , Chuandong Li , Zhuhong Zhang
发明人： Mahdi Zamani , Chuandong Li , Zhuhong Zhang
IPC分类号： H04B10/04 , H04J14/06 , H04B10/532 , H04B10/50 , H04J14/02 , H04L27/26
CPC分类号： H04J14/06 , H04B10/5055 , H04B10/532 , H04J14/02 , H04L27/2697
摘要： A method of optical communication comprising encoding four modulated symbols to generate four encoded symbols in two orthogonal polarizations and transmitting the four encoded symbols in two successive time slots. An optical communication apparatus comprising a processor configured to receive two sequences of digital symbols in a plurality of time slots, wherein the two sequences correspond to two components of two orthogonal polarizations, wherein one digital symbol per polarization is received in each of the plurality of time slots, divide each of the two sequences into a plurality of groups using a modulo operation of time, wherein each group comprises two digital symbols received in two consecutive time slots, and adaptively equalize the four digital symbols of the two consecutive time slots using a 4×4 matrix to generate four modulated symbols, wherein the 4×4 matrix comprises 16 tap-vectors.

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