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1. 发明授权

US07107032B2 Radar detection method for radio local area networks 有权
标题翻译：无线局域网的雷达检测方法
公开(公告)号：US07107032B2
公开(公告)日：2006-09-12
申请号：US10338388
申请日：2003-01-08
申请人： Kuo-Hui Li
发明人： Kuo-Hui Li
IPC分类号： H04B1/10 , H04B17/00 , G01S13/00
CPC分类号： H04W16/14 , G01S7/021 , H04B17/318 , H04B17/327 , H04K3/226 , H04K3/822 , H04K2203/18 , H04W84/12
摘要： A method of radar detection in a channel for radio local area networks operating in a regulatory band. First, a quiet time and quiet period are set, in which the ratio of the quiet time to the quiet period equals 1:4. The channel is quieted for the quiet time periodically at a rate dictated by the quiet period in order to be tested for radar. During each quiet time, a received power is measured to determine whether it exceeds a predetermined threshold. Radar presence is declared when the received power on that channel exceeds the predetermined threshold.
摘要翻译：一种在监管频带内运行的无线电局域网的信道中的雷达检测方法。首先，设置一个安静的时间和安静的时间段，其中安静时间与安静时段的比例等于1：4。该通道以安静的时间周期性地定期安静地进行，以便对雷达进行测试。在每个安静时间期间，测量接收功率以确定其是否超过预定阈值。当该信道的接收功率超过预定阈值时，声明雷达的存在。

2. 发明授权

US07123662B2 OFDM detection apparatus and method for networking devices 有权
公开(公告)号：US07123662B2
公开(公告)日：2006-10-17
申请号：US10463743
申请日：2003-06-17
申请人： Kuo-Hui Li , Hung-Kun Chen
发明人： Kuo-Hui Li , Hung-Kun Chen
IPC分类号： H04K1/10 , H04L27/04 , H04J11/00
CPC分类号： H04L27/0014 , C30B25/18 , H04L2027/0065
摘要： An OFDM detection apparatus and method for networking devices. First, a sample sequence is taken from the beginning of a newly arrived network packet. Next, a first correlation sequence between the complex conjugate of the sample sequence and the sample sequence with a lag of N samples is formed. In the meantime, a second correlation sequence between the complex conjugate of the sample sequence and the sample sequence with a lag of M samples is also formed. The first and the second correlation sequence are then normalized. Depending on a comparison between the first normalized correlation sequence and a first predetermined threshold as well as another comparison between the second normalized correlation sequence and a second predetermined threshold, the newly arrived network packet is determined accordingly whether it is an OFDM modulated packet.

3. 发明申请

US20080219148A1 SYSTEM AND METHOD FOR TRANSMITTING DATAIN A MULTIPLE-BRANCH TRANSMITTER-DIVERSITY ORTHOGONAL FREQUENCY-DIVISION MULTIPLEXING (OFDM) SYSTEM 审中-公开
标题翻译：用于发送多分支发射机多路径正交频分多址（OFDM）系统的系统和方法
公开(公告)号：US20080219148A1
公开(公告)日：2008-09-11
申请号：US12124290
申请日：2008-05-21
申请人： Kuo-Hui Li , Charles Huang , Mao-Ching Chiu , Hung-Kun Chen , Chao-Ming Chang
发明人： Kuo-Hui Li , Charles Huang , Mao-Ching Chiu , Hung-Kun Chen , Chao-Ming Chang
IPC分类号： H04J11/00
CPC分类号： H04L27/2626 , H04L1/0618
摘要： A system and method for transmitting data in multiple-branch transmitter-diversity OFDM systems is presented. In one embodiment, an approach is taken where an inverse Fourier transform (IFT) is performed on data prior to encoding the data for transmission in the multiple-branch transmitter-diversity system. In another embodiment an IFT is performed on data prior to encoding the data using a space-time block code (STBC) algorithm.
摘要翻译：提出了一种在多分支发射机分集OFDM系统中传输数据的系统和方法。在一个实施例中，采用对在多分支发射机分集系统中传输数据进行编码之前的数据执行逆傅里叶变换（IFT）的方法。在另一实施例中，使用空时块码（STBC）算法在对数据进行编码之前对数据执行IFT。

4. 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。

5. 发明授权

US07272108B2 Channel estimation in orthogonal frequency-division multiplexing (OFDM) systems 有权
标题翻译：正交频分复用（OFDM）系统中的信道估计
公开(公告)号：US07272108B2
公开(公告)日：2007-09-18
申请号：US10308513
申请日：2002-12-03
申请人： Kuo Hui Li , Charles Huang , Mao-Ching Chiu , Hung-Kun Chen , Chao-Ming Chang
发明人： Kuo Hui Li , Charles Huang , Mao-Ching Chiu , Hung-Kun Chen , Chao-Ming Chang
IPC分类号： H04J11/00 , H04K1/10 , H04B7/10
CPC分类号： H04L5/0048 , H04B7/0613 , H04L1/0618 , H04L5/0023 , H04L25/0204 , H04L25/0226 , H04L25/0228
摘要： A system and method for estimating channel characteristics in orthogonal frequency-division multiplexing (OFDM) systems with transmitter diversity is presented. The disclosed approach is compatible with the Institute of Electrical and Electronics Engineers (IEEE) “Wireless Local Area Network (LAN) Medium Access Control (MAC) and Physical Layer (PHY) Specification.” In the disclosed system and method, an additional training symbol is transmitted during the data period. This provides additional information that may be used to more accurately estimate channel characteristics.
摘要翻译：提出了一种用于估计具有发射机分集的正交频分复用（OFDM）系统中的信道特性的系统和方法。所公开的方法与电气和电子工程师协会（IEEE）“无线局域网（LAN）媒体接入控制（MAC）和物理层（PHY）规范”兼容。在所公开的系统和方法中，在数据周期期间传送附加的训练符号。这提供了可用于更准确地估计信道特性的附加信息。

6. 发明授权

US07394754B2 System and method for transmitting data in a multiple-branch transmitter-diversity orthogonal frequency-division multiplexing (OFDM) system 有权
标题翻译：用于在多分支发射机 - 分集正交频分复用（OFDM）系统中传输数据的系统和方法
公开(公告)号：US07394754B2
公开(公告)日：2008-07-01
申请号：US10301046
申请日：2002-11-21
申请人： Kuo Hui Li , Charles Huang , Mao-Ching Chiu , Hung-Kun Chen , Chao-Ming Chang
发明人： Kuo Hui Li , Charles Huang , Mao-Ching Chiu , Hung-Kun Chen , Chao-Ming Chang
IPC分类号： H04J11/00 , H04L27/00 , H04B1/04
CPC分类号： H04L27/2626 , H04L1/0618
摘要： A system and method for transmitting data in multiple-branch transmitter-diversity OFDM systems is presented. In one embodiment, an approach is taken where an inverse Fourier transform (IFT) is performed on data prior to encoding the data for transmission in the multiple-branch transmitter-diversity system. In another embodiment an IFT is performed on data prior to encoding the data using a space-time block code (STBC) algorithm.
摘要翻译：提出了一种用于在多分支发射机分集OFDM系统中传输数据的系统和方法。在一个实施例中，采用对在多分支发射机分集系统中传输数据进行编码之前的数据执行逆傅里叶变换（IFT）的方法。在另一实施例中，使用空时块码（STBC）算法在对数据进行编码之前对数据执行IFT。

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