公开(公告)号：US20100272198A1

公开(公告)日：2010-10-28

申请号：US12501486

申请日：2009-07-12

申请人： Yung-Szu Tu ,  Jiunn-Tsair Chen ,  Yen-Chin Liao ,  Cheng-Hsuan Wu

发明人： Yung-Szu Tu ,  Jiunn-Tsair Chen ,  Yen-Chin Liao ,  Cheng-Hsuan Wu

IPC分类号： H04L27/28 ,  H04L27/00

CPC分类号： H04L25/0212 ,  H04L25/022 ,  H04L25/0222 ,  H04L25/0224

摘要： A method and related system of transmission channel detection condition in a wireless communication system are disclosed. The method includes receiving a symbol, performing a channel estimation operation to generate a channel estimation result according to the symbol, performing a cross correlation operation on the channel estimation result and an initial channel estimation result to generate an operation result, and determining whether the condition of the transmission channel have changed or not.

摘要翻译： 公开了一种在无线通信系统中的传输信道检测条件的方法和相关系统。 该方法包括接收符号，执行信道估计操作以根据符号生成信道估计结果，对信道估计结果执行互相关操作和初始信道估计结果以产生操作结果，以及确定条件 的传输通道已经改变了。

公开(公告)号：US20090245400A1

公开(公告)日：2009-10-01

申请号：US12362054

申请日：2009-01-29

申请人： Jiunn-Tsair Chen ,  Cheng-Hsuan Wu ,  Yai-Nan Lee

发明人： Jiunn-Tsair Chen ,  Cheng-Hsuan Wu ,  Yai-Nan Lee

IPC分类号： H04L27/28 ,  H04L1/02

CPC分类号： H04L1/0009 ,  H04L1/0015 ,  H04L1/06

摘要： A method that selects an error-correction code for use in a multiple-input multiple output (MIMO) wireless communication system is disclosed that optimizes the performance of the MIMO wireless communication system. The method selects the error-correction code according to at least one system parameter and at least one channel parameter of the MIMO wireless communication system, such that the selected error-correction code matches the hardware configuration and channel setting of the MIMO wireless communication system.

摘要翻译： 公开了一种选择在多输入多输出（MIMO）无线通信系统中使用的纠错码的方法，其优化了MIMO无线通信系统的性能。 该方法根据MIMO无线通信系统的至少一个系统参数和至少一个信道参数选择纠错码，使得所选择的纠错码与MIMO无线通信系统的硬件配置和信道设置相匹配。

公开(公告)号：US20090232068A1

公开(公告)日：2009-09-17

申请号：US12357798

申请日：2009-01-22

申请人： Cheng-Hsuan WU ,  Jiunn-Tsair Chen

发明人： Cheng-Hsuan WU ,  Jiunn-Tsair Chen

IPC分类号： H04W4/00

CPC分类号： H04W72/06 ,  H04W72/0406

摘要： The present invention provides a method for dynamic channel assignment for a wireless communication system. First, a respective channel allocation probability vector at each mobile terminal is randomly generated, and is then sent to the base stations covering the mobile terminal. Subsequently, the channel allocation probability vectors are integrated into channel allocation information for the mobile terminals covered by the base station. Afterwards, based on the channel allocation information, a corresponding channel allocation notice is sent to the mobile terminals covered by the base station, respectively. Finally, according to the channel allocation notice, the channels of the base station are assigned for the mobile terminals covered by the base station.

摘要翻译： 本发明提供了一种用于无线通信系统的动态信道分配的方法。 首先，随机生成各移动终端的各信道分配概率向量，然后发送给覆盖移动终端的基站。 随后，信道分配概率向量被集成到由基站覆盖的移动终端的信道分配信息中。 然后，基于信道分配信息，将相应的信道分配通知分别发送到由基站覆盖的移动终端。 最后，根据信道分配通知，为基站覆盖的移动终端分配基站的信道。

公开(公告)号：US20070115799A1

公开(公告)日：2007-05-24

申请号：US11327217

申请日：2006-01-05

申请人： Pang-An Ting ,  Chao-Kai Wen ,  Wei-Ping Chuang ,  Jiunn-Tsair Chen

发明人： Pang-An Ting ,  Chao-Kai Wen ,  Wei-Ping Chuang ,  Jiunn-Tsair Chen

IPC分类号： H04J11/00

CPC分类号： H04L25/0206 ,  H04B7/0417 ,  H04B7/0626 ,  H04L1/0026 ,  H04L1/06 ,  H04L25/0248 ,  H04L25/03343 ,  H04L27/2601 ,  H04L2025/03414 ,  H04L2025/03426

摘要： The present invention provides an antenna-array-based multiple-input multiple-output orthogonal-frequency-division-multiplexing (MIMO-OFDM) system and a pre-coding and feedback method used in the same. The present invention uses QR decompositions of the MIMO channel matrixes to parameterize the channel state information (CSI) of every OFDM frequency band. In addition, the present invention feeds back the information related to θ and φ in the Givens rotation matrixes of the partial frequency bands and then uses an interpolation method to generate θ and φ in the Givens rotation matrixes of all the frequency bands, which further is able to represent the CSI of all the frequency bands. In this way, the present invention has advantages of low complexity and low feedback rate requirement.

摘要翻译： 本发明提供了一种基于天线阵列的多输入多输出正交频分复用（MIMO-OFDM）系统及其中使用的预编码和反馈方法。 本发明使用MIMO信道矩阵的QR分解来参数化每个OFDM频带的信道状态信息（CSI）。 此外，本发明反馈了与部分频带的Givens旋转矩阵中的θ和phi相关的信息，然后使用内插方法来产生所有频带的Givens旋转矩阵中的θ和φi，这进一步是 能够表示所有频段的CSI。 这样，本发明具有复杂度低，反馈率低的优点。

公开(公告)号：US20060109893A1

公开(公告)日：2006-05-25

申请号：US10998122

申请日：2004-11-24

申请人： Hsin-Hung Chen ,  Jiunn-Tsair Chen ,  Young-Kai Chen ,  Po-Chiun Huang ,  Kun-Yii Tu

发明人： Hsin-Hung Chen ,  Jiunn-Tsair Chen ,  Young-Kai Chen ,  Po-Chiun Huang ,  Kun-Yii Tu

IPC分类号： H04L5/16

CPC分类号： H04L27/364 ,  H04B1/30 ,  H04L27/3863 ,  H04L2027/0016 ,  H04L2027/0022

摘要： A transceiver includes a transmitter, a receiver, and an electrical feedback line. The transmitter has a quadrature-modulator and is configurable to compensate inphase/quadrature phase imbalances produced by hardware of the transmitter. The quadrature-modulator is configured to quadrature-modulate a carrier wave. The receiver has a quadrature-demodulator and is configurable to compensate for inphase/quadrature phase imbalances produced by hardware in the receiver. The quadrature-demodulator is configured to demodulate a quadrature-demodulated carrier. The electrical feedback line connects an output of the transmitter to an input of the receiver.

摘要翻译： 收发器包括发射器，接收器和电反馈线。 发射机具有正交调制器，可配置为补偿发射机硬件产生的同相/正交相位不平衡。 正交调制器被配置为对载波进行正交调制。 接收机具有正交解调器，可配置为补偿接收机中由硬件产生的同相/正交相位不平衡。 正交解调器被配置为解调正交解调载波。 电反馈线将发射机的输出连接到接收机的输入。

公开(公告)号：US07035238B1

公开(公告)日：2006-04-25

申请号：US09353460

申请日：1999-07-13

申请人： Jiunn-Tsair Chen ,  Gerard Joseph Foschini ,  Constantinos Basil Papadias

发明人： Jiunn-Tsair Chen ,  Gerard Joseph Foschini ,  Constantinos Basil Papadias

IPC分类号： H04B7/216

CPC分类号： H04J13/18 ,  H04B1/7097 ,  H04J13/004

摘要： A CDMA wireless communication system for communicating with wireless terminals. The system comprises a channel estimator for determining characteristics of the wireless channels of the wireless terminals. The channel characteristics are used by a code optimizer to assign spreading codes to the wireless terminals. In one embodiment, the code optimizer utilizes an iterative code optimization algorithm and maintains a processing set of wireless terminals. The code optimizer chooses target wireless terminals and performs a random code search in order to find an improved code for the target wireless terminal. The improved code found in the random code search is further improved by performing a gradient search of codes in the signal space in the vicinity of the improved code and by performing a gradient search of transmission delays. The improved codes are transmitted to the wireless terminals for use in reverse link communication.

摘要翻译： 一种用于与无线终端进行通信的CDMA无线通信系统。 该系统包括用于确定无线终端的无线信道的特性的信道估计器。 信道特性被代码优化器用于向无线终端分配扩展码。 在一个实施例中，代码优化器利用迭代代码优化算法并维护无线终端的处理集合。 代码优化器选择目标无线终端，并执行随机码搜索，以找到目标无线终端的改进代码。 通过对改进码附近的信号空间中的码进行梯度搜索，并通过执行传输延迟的梯度搜索来进一步改进在随机码搜索中发现的改进码。 改进的代码被发送到无线终端以用于反向链路通信。

公开(公告)号：US06172565B2

公开(公告)日：2001-01-09

申请号：US09041604

申请日：1998-03-13

申请人： Jiunn-Tsair Chen ,  Young-Kai Chen ,  Huan-Shang Tsai

发明人： Jiunn-Tsair Chen ,  Young-Kai Chen ,  Huan-Shang Tsai

IPC分类号： H03F126

CPC分类号： H03F1/3229

摘要： A feedforward linearizer includes a signal cancellation circuit and an error cancellation circuit. The signal cancellation circuit includes a tap delay line, that delay the input signal by a predetermined time delay so as to provide several delayed versions of the input signal. Each delayed version of the input signal is weighted by a tap coefficient. The weighted signals are then added together and fed to the power amplifier. The tap coefficients are derived such that the signals traveling through the upper and lower branch of the signal cancellation loop are aligned and that the output signal of the power amplifier is equalized.

摘要翻译： 前馈线性化电路包括信号消除电路和误差消除电路。 信号消除电路包括抽头延迟线，其将输入信号延迟预定的时间延迟，以便提供输入信号的几个延迟版本。 每个延迟版本的输入信号由抽头系数加权。 然后将加权信号相加并馈送到功率放大器。 导出抽头系数，使得通过信号消除环路的上部和下部分支行进的信号被对准，并且功率放大器的输出信号相等。

公开(公告)号：US08488530B2

公开(公告)日：2013-07-16

申请号：US11465805

申请日：2006-08-19

申请人： Cheng-Hsuan Wu ,  Jiunn-Tsair Chen

发明人： Cheng-Hsuan Wu ,  Jiunn-Tsair Chen

IPC分类号： H04W72/04 ,  H04W4/00 ,  H04L12/28

CPC分类号： H04W16/10 ,  H04B17/391 ,  H04W16/22 ,  H04W28/18 ,  H04W72/04 ,  H04W88/08

摘要： Disclosed is a method and apparatus for dynamic channel assignment (DCA) in a wireless network, which describes the complex channel assignment problem with a decoding problem. The invention describes the decoding problem with a normal graph and specifies all the local rules enforced by all the nodes at access point sides and subscriber sides. Then, the invention carries out the sum-product algorithm to solve the DCA. It is not only a fully-distributed low-complexity DCA technology, but also significantly increases the network throughput. The invention further adopts the concept of subscriber exclusive region to guarantee the link quality between a subscriber and an access point.

摘要翻译： 公开了一种无线网络中动态信道分配（DCA）的方法和装置，其描述了解码问题的复杂信道分配问题。 本发明描述了普通图的解码问题，并指定了接入点侧和用户侧所有节点实施的所有本地规则。 然后，本发明实施求和算法来求解DCA。 它不仅是一种全面分布的低复杂度DCA技术，而且显着提高了网络吞吐量。 本发明进一步采用用户独占区域的概念来保​​证用户和接入点之间的链路质量。

公开(公告)号：US08254479B2

公开(公告)日：2012-08-28

申请号：US12501486

申请日：2009-07-12

申请人： Yung-Szu Tu ,  Jiunn-Tsair Chen ,  Yen-Chin Liao ,  Cheng-Hsuan Wu

发明人： Yung-Szu Tu ,  Jiunn-Tsair Chen ,  Yen-Chin Liao ,  Cheng-Hsuan Wu

IPC分类号： H04L17/28 ,  H04L27/00

CPC分类号： H04L25/0212 ,  H04L25/022 ,  H04L25/0222 ,  H04L25/0224

摘要： A method and related system of transmission channel detection condition in a wireless communication system are disclosed. The method includes receiving a symbol, performing a channel estimation operation to generate a channel estimation result according to the symbol, performing a cross correlation operation on the channel estimation result and an initial channel estimation result to generate an operation result, and determining whether the condition of the transmission channel have changed or not.

摘要翻译： 公开了一种在无线通信系统中的传输信道检测条件的方法和相关系统。 该方法包括接收符号，执行信道估计操作以根据符号生成信道估计结果，对信道估计结果执行互相关操作和初始信道估计结果以产生操作结果，以及确定条件 的传输通道已经改变了。

公开(公告)号：US08145154B2

公开(公告)日：2012-03-27

申请号：US12479838

申请日：2009-06-07

申请人： Yung-Szu Tu ,  Jiunn-Tsair Chen ,  Chun-Hsien Wen ,  Cheng-Hsuan Wu ,  Chien-Cheng Lin

发明人： Yung-Szu Tu ,  Jiunn-Tsair Chen ,  Chun-Hsien Wen ,  Cheng-Hsuan Wu ,  Chien-Cheng Lin

IPC分类号： H03C1/62 ,  H04B17/00

CPC分类号： H04B17/336 ,  H04L1/0003

摘要： An approximation method for SNR soft information for a transmitter of a communications system includes obtaining a conditional probability density function (PDF) corresponding to a response message of a transmitted packet, obtaining a PDF of a probability distribution model, and a mean and a variance of the PDF, by approximating the conditional PDF corresponding to the response message with the probability distribution model, and calculating a second mean and a second variance of a second PDF approximated to a conditional PDF of SNR corresponding to the transmitted packet according to the mean and the variance of the PDF, and a first mean and a first variance of a first PDF approximated to a conditional PDF of SNR corresponding to another transmitted packet immediately preceding the transmitted packet.

摘要翻译： 用于通信系统的发射机的SNR软信息的近似方法包括获得与发送分组的响应消息相对应的条件概率密度函数（PDF），获得概率分布模型的PDF，以及平均和方差 PDF，通过近似具有概率分布模型的响应消息对应的条件PDF，并且根据平均值和平均值计算近似于与所发送的分组相对应的SNR的条件PDF的第二PDF的第二平均值和第二方差 PDF的方差，以及近似于紧邻发送的分组之前的另一发送分组的对应于条件的条件PDF的第一PDF的第一均值和第一方差。