专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20050047524A1 Apparatus and method for calculating bit metrics in data receivers 有权
标题翻译：用于计算数据接收器中比特度量的装置和方法
公开(公告)号：US20050047524A1
公开(公告)日：2005-03-03
申请号：US10653279
申请日：2003-09-02
申请人： Mao-Ching Chiu , Chi-Chao Chao
发明人： Mao-Ching Chiu , Chi-Chao Chao
IPC分类号： H04L25/06 , H04L27/06
CPC分类号： H04L25/067
摘要： An apparatus and method for calculating bit metrics in data receivers. The apparatus of the invention includes a storage unit and a calculator. The storage unit is configured to store a number of modulation-dependent coefficients; it selects as output one of the coefficients in accordance with a modulation mode being used. The calculator receives the selected coefficient from the storage unit and takes a received signal and a channel response in the frequency domain. According to the selected coefficient, the received signal and the channel response, the calculator generates at least N number of bit metrics for an N-bit codeword in the received signal.
摘要翻译：一种用于计算数据接收器中的比特度量的装置和方法。本发明的装置包括存储单元和计算器。存储单元被配置为存储多个与调制有关的系数; 它根据正在使用的调制模式选择系数中的一个输出。计算器从存储单元接收所选择的系数，并在频域中接收接收的信号和信道响应。根据所选择的系数，接收到的信号和信道响应，计算器生成接收信号中的N比特码字的至少N个比特度量。

2. 发明授权

US07269227B2 Apparatus and method for calculating bit metrics in data receivers 有权
标题翻译：用于计算数据接收器中比特度量的装置和方法
公开(公告)号：US07269227B2
公开(公告)日：2007-09-11
申请号：US10653279
申请日：2003-09-02
申请人： Mao-Ching Chiu , Chi-Chao Chao
发明人： Mao-Ching Chiu , Chi-Chao Chao
IPC分类号： H04L5/12
CPC分类号： H04L25/067
摘要： An apparatus and method for calculating bit metrics in data receivers. The apparatus of the invention includes a storage unit and a calculator. The storage unit is configured to store a number of modulation-dependent coefficients; it selects as output one of the coefficients in accordance with a modulation mode being used. The calculator receives the selected coefficient from the storage unit and takes a received signal and a channel response in the frequency domain. According to the selected coefficient, the received signal and the channel response, the calculator generates at least N number of bit metrics for an N-bit codeword in the received signal.
摘要翻译：一种用于计算数据接收器中的比特度量的装置和方法。本发明的装置包括存储单元和计算器。存储单元被配置为存储多个与调制有关的系数; 它根据正在使用的调制模式选择系数中的一个输出。计算器从存储单元接收所选择的系数，并在频域中接收接收的信号和信道响应。根据所选择的系数，接收到的信号和信道响应，计算器生成接收信号中的N比特码字的至少N个比特度量。

3. 发明授权

US07254185B2 Method for recovering a digital data content in a communication system and apparatus for performing the same 有权
标题翻译：在通信系统中恢复数字数据内容的方法及其执行方法
公开(公告)号：US07254185B2
公开(公告)日：2007-08-07
申请号：US10065678
申请日：2002-11-07
申请人： Mao-Ching Chiu , Chi-Chao Chao , Chao-Ming Chang , Tai-Yuan Cheng , Hung-Kun Chen
发明人： Mao-Ching Chiu , Chi-Chao Chao , Chao-Ming Chang , Tai-Yuan Cheng , Hung-Kun Chen
IPC分类号： H03K9/00
CPC分类号： H04L7/0029 , H04L7/0004
摘要： A method is directed to recovering a digital data content in a communication system, wherein the digital data content has been converted into an analog signal based on a primary clock, at a transmitter for transmitting to a receiver. The method comprises receiving the analog signal by the receiver. The analog signal is converted into a digital signal, based on a clock of the receiver. The digital signal is interpolated at the desired interpolation point, if digital signal in time has been shifted by an amount equal to or larger than a predetermined time length. The interpolated digital signal is recovered back to the digital data content, with the assist of an estimated channel impulse response. The channel impulse response is retrained every time when the interpolation point is significantly changed.
摘要翻译：一种方法涉及在通信系统中恢复数字数据内容，其中在用于发送到接收机的发射机处，数字数据内容已经被转换为基于主时钟的模拟信号。该方法包括由接收器接收模拟信号。基于接收机的时钟，模拟信号被转换为数字信号。数字信号在期望的插补点被内插，如果时间上的数字信号被移位了等于或大于预定时间长度的量。借助于估计的信道脉冲响应的辅助，内插的数字信号被恢复回数字数据内容。每当插补点显着改变时，重新训练通道脉冲响应。

4. 发明授权

US07298798B1 Method and system for decoding block codes 有权
标题翻译：块代码解码方法和系统
公开(公告)号：US07298798B1
公开(公告)日：2007-11-20
申请号：US10227080
申请日：2002-08-21
申请人： Chi Chao Chao , Mao Ching Chiu
发明人： Chi Chao Chao , Mao Ching Chiu
IPC分类号： H03D1/00 , H04L27/06 , H03M3/00
CPC分类号： H04L25/03203 , H03M13/251 , H03M13/3944 , H04L25/03286 , H04L25/03292
摘要： A method and system are disclosed for decoding block codes using a single decoder and trellis diagram. The signal can include at least one block code, and the block code can be modulated using at least one of a plurality of modulation modes. The block code contained in the signal can be selectively decoded based on the modulation mode for the block code using a trellis diagram corresponding to the modulation mode for the block code, for example, a low and high-rate CCK modulation mode or a differential quadrature phase shift keying (DQPSK) Baker sequence modulation mode and a differential binary phase shift keying (DBPSK) Barker sequence modulation mode. The trellis diagram can have multiple embedded subtrellis diagrams in the trellis diagram. In this manner, multiple types of block codes and be decoded using a single decoder and trellis diagram.
摘要翻译：公开了一种用于使用单个解码器和网格图对块码进行解码的方法和系统。信号可以包括至少一个块码，并且可以使用多个调制模式中的至少一个调制块码。可以使用与用于块码的调制模式相对应的格子图例，例如低速率和高速率CCK调制模式或差分正交的方式，基于用于块码的调制模式来选择性地解码包含在信号中的块码相移键控（DQPSK）贝克序列调制模式和差分二进制相移键控（DBPSK）巴克序列调制模式。网格图可以在网格图中具有多个嵌入式子框图。以这种方式，使用多种类型的块码并使用单个解码器和网格图进行解码。

5. 发明授权

US07017104B1 Method and system for decoding block codes by calculating a path metric according to a decision feedback sequence estimation algorithm 失效
标题翻译：通过根据判定反馈序列估计算法计算路径度量来解码块码的方法和系统
公开(公告)号：US07017104B1
公开(公告)日：2006-03-21
申请号：US10227093
申请日：2002-08-21
申请人： Tsung Hui Chen , Chi Chao Chao , Mao Ching Chiu , Chao Ming Chang
发明人： Tsung Hui Chen , Chi Chao Chao , Mao Ching Chiu , Chao Ming Chang
IPC分类号： H04L1/20 , H04L27/01
CPC分类号： H04L1/20 , H04L25/03197 , H04L25/03203
摘要： A method and system are disclosed that provide a more efficient decoder for decoding block codes such as a complementary code keying (CCK) code. A receiver receives a signal containing at least one block codeword. A decoder decodes the block codeword contained in the received signal by finding a path in a trellis diagram with a calculated path metric that accounts for intersymbol interference (ISI). The path metric can be based on a branch metric that is calculated according to a decision feedback sequence estimation algorithm.
摘要翻译：公开了一种方法和系统，其提供用于解码块代码的更有效的解码器，例如互补码键控（CCK）码。接收机接收包含至少一个块码字的信号。解码器通过在网格图中找到具有考虑码间干扰（ISI）的计算路径度量的路径来解码包含在接收信号中的块码字。路径度量可以基于根据判决反馈序列估计算法计算的分支度量。

6. 发明申请

US20050128954A1 Method for transmission rate adapatation 审中-公开
标题翻译：传输速率适应方法
公开(公告)号：US20050128954A1
公开(公告)日：2005-06-16
申请号：US10728829
申请日：2003-12-08
申请人： Kuo-Hui Li , Chi-Chao Chao
发明人： Kuo-Hui Li , Chi-Chao Chao
IPC分类号： H04L1/00 , H04L1/16 , H04L1/20 , H04L12/28 , H04L12/56 , H04J1/16
CPC分类号： H04W28/22 , H04L1/0002 , H04L1/0021 , H04L1/16 , H04L1/20 , H04L47/10 , H04L47/263 , H04L47/29
摘要： A method for transmission rate adaptation used in a wireless network. A current transmission rate is selected from a set of predetermined transmission rates. Each of the predetermined transmission rates, R, is associated with a PER (packet error rate) range, which includes a predetermined threshold pair of a high PER threshold, denoted as QH(R), and a low PER threshold, denoted as QL(R). First, calculate a first estimated PER, denoted as P1(rn), wherein rn denotes the current transmission rate. Then, check whether the P1(rn) is larger than the QH(rn), if yes, reduce the transmission rate. Then, calculate a second estimated PER, denoted as P2(rn), and check whether the P2(rn) is smaller than the QL(rn), if yes, increase the transmission rate. And, check whether the P2(rn) being larger than the QH(rn), if yes, reduce the transmission rate.
摘要翻译：一种用于无线网络中的传输速率适配的方法。从一组预定的传输速率中选择当前传输速率。预定传输速率R中的每一个与PER（分组错误率）范围相关联，该PER（分组错误率）范围包括表示为Q H（R）的高PER阈值的预定阈值对，以及低PER阈值，表示为Q L（R）。首先，计算表示为P1（r）n N的第一估计PER，其中r N n表示当前传输速率。然后，如果是，则检查P1（r> n ）是否大于Q H n（r N n N），如果是，则降低传输速率。然后，计算表示为P2（r> n>）的第二估计PER，并检查P2（r> n ）是否小于Q < 如果是，则增加传输速率。并且，如果是，则检查P2（r> n ）是否大于Q（N），否则降低传输速率。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式