公开(公告)号：US20120321023A9

公开(公告)日：2012-12-20

申请号：US13296610

申请日：2011-11-15

Applicant: Ye Li ,  Nelson Ray Sollenberger ,  Jack Harriman Winters

Inventor： Ye Li ,  Nelson Ray Sollenberger ,  Jack Harriman Winters

IPC: H04L27/06

CPC classification number: H04L27/2601 ,  H04L1/0618

Abstract: A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.

Abstract translation: MIMO OFDM系统包括用于对具有独立时空码的各个数据块进行编码的多个时空编码器。 经变换的数据块信号由多个发射天线发射并由多个接收天线接收。 接收的数据在最大似然检测之前被预先白化。 在一个实施例中，可以起诉连续的干扰消除以改善系统性能。 可以通过基于偏离平均值的信道脉冲响应估计来加权信道参数估计。

公开(公告)号：US20120057661A1

公开(公告)日：2012-03-08

申请号：US13296610

申请日：2011-11-15

Applicant: Ye Li ,  Nelson Ray Sollenberger ,  Jack Harriman Winters

Inventor： Ye Li ,  Nelson Ray Sollenberger ,  Jack Harriman Winters

IPC: H04L27/06

CPC classification number: H04L27/2601 ,  H04L1/0618

Abstract: A MIMO OFDM system includes a plurality of space-time encoders for encoding respective data blocks with independent space-time codes. The transformed data block signals are transmitted by a plurality of transmit antennas and received by a plurality of receive antennas. The received data is pre-whitened prior to maximum likelihood detection. In one embodiment, successive interference cancellation can be sued to improve system performance. Channel parameter estimation can be enhanced by weighting the channel impulse response estimates based upon a deviation from average.

公开(公告)号：US08112038B2

公开(公告)日：2012-02-07

申请号：US11532488

申请日：2006-09-15

Applicant: Ye Li ,  Anthony C. K. Soong ,  Yinggang Du ,  Jianmin Lu

Inventor： Ye Li ,  Anthony C. K. Soong ,  Yinggang Du ,  Jianmin Lu

IPC: H04B1/00

CPC classification number: H04B7/0452 ,  H04B7/0439 ,  H04B7/0617

Abstract: Disclosed herein is a system and method for downlink beamforming that takes into account imperfect channel state information (CSI) at the transmitter when determining the steering vector used in the beamforming process. The steering vector is calculated to increase the ratio of the average power of a desired signal component to the sum of the interference power of other wireless terminals, referred to as the signal-to-leakage ratio. By accounting for imperfect CSI when calculating the steering vector, the bit-error rate for a given signal-to-noise ratio is decreased. Also disclosed is a power allocation method that improves performance of the system by increasing the signal-to-interference-plus-noise ratio for all of the wireless terminals currently communicating with the base station. The power allocation similarly decreases the bit-error rate for a given signal-to-noise ratio, especially at high signal-to-noise ratios.

Abstract translation: 这里公开了一种用于下行链路波束成形的系统和方法，其在确定在波束形成处理中使用的导向向量时考虑到发射机处的不完美信道状态信息（CSI）。 计算导向矢量以增加所需信号分量的平均功率与其它无线终端的干扰功率之和的比率，称为信号与泄漏比。 通过在计算导向矢量时考虑不完善的CSI，给定信噪比的误码率降低。 还公开了一种功率分配方法，其通过增加当前与基站通信的所有无线终端的信号与干扰加噪声比来提高系统的性能。 功率分配类似地降低给定信噪比的比特误码率，特别是在高信噪比下。

公开(公告)号：US08107509B2

公开(公告)日：2012-01-31

申请号：US12865965

申请日：2009-01-22

Applicant: Erjun Zang ,  Jianping Cao ,  Ye Li ,  Zhanjun Fang

Inventor： Erjun Zang ,  Jianping Cao ,  Ye Li ,  Zhanjun Fang

IPC: H01S3/11 ,  H01S3/081 ,  H01S3/08

CPC classification number: H01S5/141 ,  G02B5/04 ,  G02B5/18 ,  G02B5/1814 ,  G02B5/1861 ,  G02B5/284 ,  H01S3/08059 ,  H01S5/02248 ,  H01S5/143

Abstract: This invention relates to a monolithic folded F-P cavity used for semiconductor laser, which is composed of a monolithic optical element. The monolithic optical element is made of the material having low propagation loss for a certain spectrum range. Light entering through an input/output coupling surface of the monolithic optical element is reflected several times between the input/output coupling surface and at least two high reflection surfaces within the monolithic optical element, and then at least one part of the light exits through the input/output coupling surface along the path which is collinear with the incident light but in an opposite direction. By means of integrating reflecting and coupling parts of the folded F-P cavity within a single monolithic optical material, this invention greatly improves the reliability of the F-P cavity, and has other advantages, such as insensitive to outside interferences, smaller size, simpler structure and easy usage. A semiconductor laser using the monolithic folded F-P cavity is also provided.

Abstract translation: 本发明涉及由单片光学元件组成的用于半导体激光器的单片折叠F-P腔。 单片光学元件由在一定光谱范围内具有低传播损耗的材料制成。 通过单片光学元件的输入/输出耦合表面进入的光在输入/输出耦合表面与单片光学元件内的至少两个高反射表面之间反射若干次，然后光的至少一部分通过 沿着与入射光共线但沿相反方向的路径的输入/输出耦合表面。 通过将折叠FP腔的反射和耦合部分集成在单个单片光学材料内，本发明大大提高了FP腔的可靠性，并且具有其他优点，如对外部干扰不敏感，尺寸更小，结构更简单，容易 用法。 还提供了使用单片折叠F-P腔的半导体激光器。

公开(公告)号：US20110263860A1

公开(公告)日：2011-10-27

申请号：US13125721

申请日：2009-10-23

Applicant: Yongjun Mao ,  Jianfeng Li ,  Jin Zheng ,  Zheng Liu ,  Kai Xie ,  Haihong Li ,  Jing Shi ,  Ye Li ,  Jingshan Shen

Inventor： Yongjun Mao ,  Jianfeng Li ,  Jin Zheng ,  Zheng Liu ,  Kai Xie ,  Haihong Li ,  Jing Shi ,  Ye Li ,  Jingshan Shen

IPC: C07D215/20 ,  C07D215/38 ,  C07C69/78

CPC classification number: C07C229/64 ,  C07C237/30 ,  C07C255/30 ,  C07D215/56

Abstract: The present invention relates to a method for preparing 6-substituted amino-3-cyanoquinoline compounds (compound A for short) and the intermediates thereof, more particularly, to a compound of the following formula (I), the preparation method thereof, the intermediates thereof and use thereof for preparing the compound A. The compound of the formula (I) is cyclized in the presence of an alkali to give a compound of formula A, wherein W is OH; or the compound of the formula (I) is cyclized in the presence of an alkali, and then chlorinated to give a compound of the formula A, wherein W is Cl. Compared with the known methods in the literature, the method for preparing the compound A from the compound of formula (I) according to the present invention can avoid using high-temperature condition and high boiling point solvents, and is safe and environment-friendly, mild in reaction condition, easy in operation with a high yield and high product purity.

Abstract translation: 本发明涉及一种制备6-取代氨基-3-氰基喹啉化合物（简称为化合物A）的方法及其中间体，更具体地涉及下式（I）的化合物，其制备方法，中间体 及其用于制备化合物A的用途。式（I）化合物在碱存在下环化，得到式A化合物，其中W为OH; 或式（I）化合物在碱的存在下环化，然后氯化，得到式A化合物，其中W为Cl。 与文献中已知的方法相比，本发明的式（I）化合物制备化合物A的方法可以避免使用高温条件和高沸点溶剂，且安全环保， 反应条件温和，易于操作，产率高，产品纯度高。

公开(公告)号：US20090003489A1

公开(公告)日：2009-01-01

申请号：US12151419

申请日：2008-05-06

Applicant: Ye Li ,  Nelson Ray Sollenberger

Inventor： Ye Li ,  Nelson Ray Sollenberger

IPC: H04L27/06

CPC classification number: H04L27/2647 ,  H04L5/023 ,  H04L25/0204 ,  H04L25/0242

Abstract: An improved OFDM receiver is realized by employing a simplified delay function for the transmissions channel. The simplified delay function yields a simplified frequency-domain correlation that is applied to develop an Eigen matrix U that is used in developing estimates of the channels. Those channel estimates are used in the receiver to develop the output signals.

Abstract translation: 通过对传输信道采用简化的延迟函数来实现改进的OFDM接收机。 简化的延迟函数产生一个简化的频域相关性，用于开发用于开发信道估计的特征矩阵U。 在接收机中使用这些信道估计来开发输出信号。

公开(公告)号：US07460620B2

公开(公告)日：2008-12-02

申请号：US11240228

申请日：2005-09-30

Applicant: Justin C. Chuang ,  Ye Li ,  Lang Lin

Inventor： Justin C. Chuang ,  Ye Li ,  Lang Lin

IPC: H04L27/06 ,  H04L5/12

CPC classification number: H04L25/0204 ,  H04L27/2647

Abstract: Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A method for estimating channel characteristics in a multicarrier transmission system comprising the steps of receiving a multicarrier signal, applying Fast Fourier transformations to the multicarrier signal, estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using a combination of iterative processing and iterative backward processing, and decoding the transformed multicarrier signal is presented.

Abstract translation: 提出了编码正交频分复用（COFDM）系统的联合信道估计和最大似然解码方法。 使用这种方法结合卷积编码，可以在快速色散衰落通道中实现鲁棒和近似最佳的相干检测。 在具有激进频率重用的系统中实现了分组数据吞吐量的显着性能增益。 一种用于估计多载波传输系统中的信道特性的方法，包括以下步骤：接收多载波信号，对所述多载波信号应用快速傅里叶变换，使用迭代处理和迭代处理的组合估计多载波信号的传输的信道特性， 呈现迭代反向处理和解码变换后的多载波信号。

公开(公告)号：US20060034380A1

公开(公告)日：2006-02-16

申请号：US11240899

申请日：2005-09-30

Applicant: Ye Li

Inventor： Ye Li

IPC: H04K1/10 ,  H04B7/02

CPC classification number: H04L25/0228 ,  H04L25/0204 ,  H04L25/0242 ,  H04L27/261

Abstract: In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols.

公开(公告)号：US06654429B1

公开(公告)日：2003-11-25

申请号：US09293631

申请日：1999-04-16

Applicant: Ye Li

Inventor： Ye Li

IPC: H03K900

CPC classification number: H04L25/0222 ,  H04L1/06 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0232 ,  H04L25/0236 ,  H04L27/2647

Abstract: A method and apparatus for pilot-symbol aided channel estimation in a wireless digital communication system which transmits packets of N OFDM data blocks, each data block comprising a set of K orthogonal carrier frequencies. At the transmitter, pilot symbols are inserted into each data packet at known positions so as to occupy predetermined positions in the time-frequency space. At the receiver, the received signal is subject to a two-dimensional inverse Fourier transform, two-dimensional filtering and a two-dimensional Fourier transform to recover the pilot symbols so as to estimate the channel response.

Abstract translation: 一种用于发送N个OFDM数据块的分组的无线数字通信系统中的导频符号辅助信道估计的方法和装置，每个数据块包括一组K个正交载波频率。 在发射机处，导频符号被插入到已知位置的每个数据分组中，以便占据时间 - 频率空间中的预定位置。 在接收机处，接收到的信号进行二维逆傅里叶变换，二维滤波和二维傅里叶变换，以恢复导频符号，以估计信道响应。

公开(公告)号：US06327314B1

公开(公告)日：2001-12-04

申请号：US09089862

申请日：1998-06-03

Applicant: Leonard Joseph Cimini, Jr. ,  Ye Li ,  Nelson Ray Sollenberger

Inventor： Leonard Joseph Cimini, Jr. ,  Ye Li ,  Nelson Ray Sollenberger

IPC: H03D100

CPC classification number: G01S3/72 ,  H01Q3/2605 ,  H04L25/022 ,  H04L27/2647

Abstract: A method and apparatus provide channel estimation for multicarrier systems. A minimum mean-square-error (MMSE) channel estimator makes full use of time-and frequency-domain correlations of the frequency response of time-varying dispersive fading channels. A robust channel estimator that is insensitive to the channel statistics is provided. The robust channel estimator can significantly improve the performance of a multicarrier system such as an orthogonal frequency division multiplexing (OFDM) modulation system in a rapid dispersive fading channel. In addition, the estimation process can employ a new reference generator which can select the source of the reference signal as being a decoded or undecoded signal depending on the correction success rate of the decoder.

Abstract translation: 一种方法和装置为多载波系统提供信道估计。 最小均方误差（MMSE）信道估计器充分利用时变色散衰落信道的频率响应的时域和频域相关性。 提供对信道统计不敏感的鲁棒信道估计器。 鲁棒的信道估计器可以显着改善快速色散衰落信道中的诸如正交频分复用（OFDM）调制系统的多载波系统的性能。 此外，估计处理可以使用新的参考生成器，其可以根据解码器的校正成功率将参考信号的源选择为解码或未解码的信号。