公开(公告)号：US08589755B2

公开(公告)日：2013-11-19

申请号：US13114793

申请日：2011-05-24

Applicant: Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

Inventor： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC: H03M13/00 ,  G06F11/00

CPC classification number: H03M13/1117 ,  H03M13/6502 ,  H03M13/658 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/0071

Abstract: Methods and systems for reduced-complexity decoding of low-density parity-check (LDPC) information. An encoded input stream is received. The received stream is decoded with one or more reduced-complexity min-sum or a posteriori probability LDPC decoders. A v-node update rule in the reduced complexity decoder is omitted.

Abstract translation: 用于低密度奇偶校验（LDPC）信息的降低复杂度解码的方法和系统。 接收编码的输入流。 所接收的流被解码为一个或多个复杂度较低的最小和或后验概率LDPC解码器。 省略了复杂度降低的解码器中的v节点更新规则。

公开(公告)号：US20130282462A1

公开(公告)日：2013-10-24

申请号：US13583889

申请日：2012-04-24

Applicant: Lei Xu ,  Juqiang Bao ,  Wei Zhou ,  Wanhui Dai

Inventor： Lei Xu ,  Juqiang Bao ,  Wei Zhou ,  Wanhui Dai

IPC: G06Q30/02

CPC classification number: G06Q30/0238 ,  G06Q30/0251

Abstract: An authentication device and a mobile device work together for redeeming an electronic promotion code at a point of sale. Upon receipt of an electronic promotion code, the authentication device encrypts the electronic promotion code and transmits the encrypted promotion code to the mobile device. In response, the mobile device decrypts the encrypted promotion code and determines whether the decrypted promotion code satisfies one or more predefined conditions. If so, the mobile device displays a message, indicating a successful redemption of the promotion code at the point of sale. In some implementations, the message includes a confirmation code, which is provided to the authentication device for generating a transaction log record. In some implementations, the mobile device also generates a separate transaction log record for the promotion code and transmits the transaction log record to a remote server for further processing.

Abstract translation: 验证设备和移动设备一起工作以在销售点兑换电子促销代码。 在接收到电子促销代码时，认证装置加密电子促销代码，并将加密的促销代码发送到移动装置。 作为响应，移动设备解密加密的促销代码，并确定解密的促销代码是否满足一个或多个预定条件。 如果是这样，移动设备会显示一条消息，指示在销售点成功兑换促销代码。 在一些实现中，消息包括确认代码，该确认代码被提供给认证设备以生成事务日志记录。 在一些实施方式中，移动设备还为促销代码生成单独的事务日志记录，并将事务日志记录传送到远程服务器用于进一步处理。

公开(公告)号：US08543634B1

公开(公告)日：2013-09-24

申请号：US13435133

申请日：2012-03-30

Applicant: Lei Xu ,  Volker Mauer ,  Steven Perry

Inventor： Lei Xu ,  Volker Mauer ,  Steven Perry

IPC: G06F15/00

CPC classification number: G06F7/552 ,  G06F2207/5523

Abstract: A specialized processing block such as a DSP block may be enhanced by including direct connections that allow the block output to be directly connected to either the multiplier inputs or the adder inputs of another such block. A programmable integrated circuit device may includes a plurality of such specialized processing blocks. The specialized processing block includes a multiplier having two multiplicand inputs and a product output, an adder having as one adder input the product output of the multiplier, and having a second adder input and an adder output, a direct-connect output of the adder output to a first other one of the specialized processing block, and a direct-connect input from a second other one of the specialized processing block. The direct-connect input connects a direct-connect output of that second other one of the specialized processing block to a first one of the multiplicand inputs.

Abstract translation: 可以通过包括允许块输出直接连接到另一个这样的块的乘法器输入或加法器输入的直接连接来增强诸如DSP块的专门处理块。 可编程集成电路设备可以包括多个这样的专用处理块。 专用处理块包括具有两个被乘数输入和乘积输出的乘法器，具有一个加法器的加法器输入乘法器的乘积输出，并具有第二加法器输入和加法器输出，加法器输出的直接连接输出 到专用处理块中的第一另一个，以及来自专门处理块中的另一个的直接连接输入。 直接连接输入将专用处理块中另外另一个的直接连接输出连接到被乘数输入中的第一个。

公开(公告)号：US20130188836A1

公开(公告)日：2013-07-25

申请号：US13877775

申请日：2010-10-18

Applicant: Yikai Fang ,  Lei Xu ,  Kongqiao Wang

Inventor： Yikai Fang ,  Lei Xu ,  Kongqiao Wang

IPC: G06K9/00

CPC classification number: G06K9/00335 ,  G06K9/00355 ,  G06K9/00375 ,  G06K9/3233 ,  G06K2009/4666

Abstract: A method for providing hand detection may include receiving feature transformed image data for a series of image frames, determining asymmetric difference data indicative of differences between feature transformed image data of a plurality of frames of the series of image frames and a reference frame, and determining a target area based on an intersection of the asymmetric difference data. An apparatus and computer program product corresponding to the method are also provided.

Abstract translation: 用于提供手检测的方法可以包括：接收用于一系列图像帧的特征变换图像数据，确定指示所述一系列图像帧的多个帧的特征变换图像数据与参考帧之间的差异的不对称差异数据，以及确定 基于非对称差分数据的交点的目标区域。 还提供了一种与该方法对应的装置和计算机程序产品。

公开(公告)号：US20130148684A1

公开(公告)日：2013-06-13

申请号：US13313490

申请日：2011-12-07

Applicant: James Yonghong GUO ,  Jay A. Skidmore ,  Lei Xu ,  Jane Cheng

Inventor： James Yonghong GUO ,  Jay A. Skidmore ,  Lei Xu ,  Jane Cheng

IPC: H01S5/022

CPC classification number: H01S5/02252 ,  H01S5/005 ,  H01S5/4012 ,  H01S5/4043

Abstract: Multi-mode diode emitters are stacked in a staircase formation to provide a spatially-mulitplexed output. Improved coupling efficiency is achieved by providing tilted collimated output beams that determine an effective step height of the stepped structure. Since the effective step height is dependent on the tilt angle, a variable number of emitters can be used inside packages having a same physical step height, while still attaining high coupling efficiency.

Abstract translation: 多模式二极管发射器堆叠在阶梯结构中以提供空间复合输出。 通过提供确定阶梯式结构的有效步长的倾斜的准直输出光束来实现改进的耦合效率。 由于有效步高取决于倾斜角度，所以在具有相同物理台阶高度的包装内可以使用可变数量的发射器，同时仍然获得高耦合效率。

公开(公告)号：US08386879B2

公开(公告)日：2013-02-26

申请号：US12189759

申请日：2008-08-11

Applicant: Ivan B Djordjevic ,  Lei Xu ,  Ting Wang ,  Milorad Cvijetic

Inventor： Ivan B Djordjevic ,  Lei Xu ,  Ting Wang ,  Milorad Cvijetic

IPC: G06F11/00

CPC classification number: H03M13/1174 ,  H03M13/136

Abstract: A method of encoding for optical transmission of information includes encoding information with a generalized low-density parity-check (GLDPC) code for providing coding gains, and constructing the GLDPC code with a Reed-Muller RM code as a component code, the component code being decodable using a maximum posterior probability (MAP) decoding. In a preferred embodiment, the GLDPC code includes a codeword length of substantially 4096, an information word length of substantially 3201, a lower-bound on minimum distance of substantially greater than or equal to 16, a code rate of substantially 0.78 and the RM component code includes an order of substantially 4 and an r parameter of substantially 6.

Abstract translation: 用于信息的光传输的编码方法包括使用用于提供编码增益的广义低密度奇偶校验（GLDPC）码的编码信息，以及用作为分量代码的里德 - 穆勒RM码构建GLDPC码， 使用最大后验概率（MAP）解码来解码。 在优选实施例中，GLDPC代码包括基本上为4096的码字长度，基本为3201的信息字长度，基本上大于或等于16的最小距离的下限，码率基本上为0.78，并且RM分量 代码包括基本为4的顺序和基本为6的r参数。

公开(公告)号：US20120321318A1

公开(公告)日：2012-12-20

申请号：US13478892

申请日：2012-05-23

Applicant: Lei Xu ,  Dayou Qian ,  Ting Wang

Inventor： Lei Xu ,  Dayou Qian ,  Ting Wang

IPC: H04J14/00

CPC classification number: H04L5/0012 ,  H04L5/0008 ,  H04L27/2642 ,  H04L27/2647

Abstract: Methods and systems for secure communication include assigning data streams to respective orthogonal sub-carriers according to random number information at a transmitter. The data streams are modulated onto the respective orthogonal sub-carriers before the orthogonal sub-carriers are transmitted. The random number information is transmitted on a second medium, separate from the transmission medium. The orthogonal sub-carriers are received from the transmission medium at a receiver, while the random number information is received from the second medium at the receiver. The orthogonal sub-carriers are associated with data streams using the random number information and demodulated to produce data for the associated data stream.

Abstract translation: 用于安全通信的方法和系统包括根据发射机处的随机数信息将数据流分配给各个正交子载波。 在发送正交子载波之前，将数据流调制到各个正交子载波上。 在与传输介质分离的第二介质上发送随机数信息。 在接收机处从传输介质接收正交子载波，而在接收机处从第二媒体接收随机数信息。 正交子载波与使用随机数信息的数据流相关联并被解调以产生用于相关联的数据流的数据。

公开(公告)号：US20120321311A1

公开(公告)日：2012-12-20

申请号：US13523045

申请日：2012-06-14

Applicant: Shaoliang Zhang ,  Fatih Yaman ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

Inventor： Shaoliang Zhang ,  Fatih Yaman ,  Lei Xu ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

IPC: H04J14/06

CPC classification number: H04B10/616 ,  H04B10/5051 ,  H04B10/532 ,  H04B10/5561 ,  H04J14/06

Abstract: An inventive method for coherent interleaved polarization-multiplexing PolMux optical communications with a single IQ modulator includes modulating a light source to generate a 50% return-to-zero RZ signal pulse at a frequency Rs, driving a single IQ modulator with inphase I and quadrature phase Q data at a bit rate of sais Rs to introduce phase modulation on said 50% RZ signal pulse to produce a QPSK pulse signal with all symbols being in a same polarization state without any time overlapping; and polarization modulating said QPSK signal to alternatively convert said QPSK signal into two orthogonal polarizations states enabling an interleaving PolMux signal with a symbol rate of Rs/2.

Abstract translation: 用于具有单个IQ调制器的相干交错偏振复用PolMux光通信的创新方法包括调制光源以产生频率为Rs的50％归零RZ信号脉冲，以同相I和正交驱动单个IQ调制器 相位Q数据以sais的比特率在所述50％RZ信号脉冲上引入相位调制以产生QPSK脉冲信号，所有符号处于相同的极化状态，没有任何时间重叠; 以及对所述QPSK信号进行极化调制，以将所述QPSK信号交替地转换为使得能够以Rs / 2的符号率进行交织的PolMux信号的两个正交极化状态。

公开(公告)号：US20120257896A1

公开(公告)日：2012-10-11

申请号：US13251218

申请日：2011-10-01

Applicant: Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

Inventor： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC: H04J14/00 ,  H04J14/06

CPC classification number: H04L27/2634 ,  H04B10/548 ,  H04B10/611 ,  H04B10/612 ,  H04B10/614 ,  H04L25/4902 ,  H04L27/2697

Abstract: Systems and methods are disclosed to provide optical communication by using subcarriers as individual bases functions, obtaining signal constellation points of an N-dimensional pulse amplitude modulation (ND-PAM) constellation diagram as an N-dimensional Cartesian product of a one-dimensional PAM; and transmitting the N-dimensional signal constellation point over all N orthogonal subcarriers serving as individual bases functions.

Abstract translation: 公开了通过使用子载波作为单个基础功能来提供光通信的系统和方法，获得作为一维PAM的N维笛卡尔乘积的N维脉冲幅度调制（ND-PAM）星座图的信号星座点; 并且在用作各个基本功能的所有N个正交子载波上发送N维信号星座点。

公开(公告)号：US20120251111A1

公开(公告)日：2012-10-04

申请号：US13077767

申请日：2011-03-31

Applicant: Lei XU ,  Ting WANG

Inventor： Lei XU ,  Ting WANG

IPC: H04J14/06

CPC classification number: H04J14/06 ,  H04B10/29 ,  H04B10/613

Abstract: A wavelength converter that operates on an optical signal having single or multiplexed polarizations and which exhibits any modulation format.

Abstract translation: 一种波长转换器，其对具有单一或多路复用偏振的光信号进行操作并具有任何调制格式。