公开(公告)号：US08121229B2

公开(公告)日：2012-02-21

申请号：US11826031

申请日：2007-07-11

申请人： Chun-Chun Kuo ,  Jen-Yuan Hsu ,  Chao-Kai Wen ,  Pang-An Ting

发明人： Chun-Chun Kuo ,  Jen-Yuan Hsu ,  Chao-Kai Wen ,  Pang-An Ting

IPC分类号： H04L27/06

CPC分类号： H04L27/2656 ,  H04L27/2666 ,  H04L27/2676

摘要： A guard section length detection method detects whether a preamble signal is received. A short preamble boundary is then detected, then detecting a frame boundary and detecting a guard section length. In the step of detecting the guard section length a second matched filter capable of processing 128 point data sets is detected. Four different 128 point data sets have a distance of 8 points, 16 points, 32 points, and 64 points respectively from the frame boundary to the second matched filter. Four signal correlation values are calculated for determining the guard section length.

摘要翻译： 保护部分长度检测方法检测是否接收到前置信号。 然后检测短前导码边界，然后检测帧边界并检测保护段长度。 在检测保护段长度的步骤中，检测能够处理128点数据集的第二匹配滤波器。 四个不同的128点数据集分别具有从帧边界到第二匹配滤波器的8点，16点，32点和64点的距离。 计算四个信号相关值以确定防护段长度。

公开(公告)号：US20080019458A1

公开(公告)日：2008-01-24

申请号：US11826031

申请日：2007-07-11

申请人： Chun-Chun Kuo ,  Jen-Yuan Hsu ,  Chao-Kai Wen ,  Pang-An Ting

发明人： Chun-Chun Kuo ,  Jen-Yuan Hsu ,  Chao-Kai Wen ,  Pang-An Ting

IPC分类号： H04B15/00

CPC分类号： H04L27/2656 ,  H04L27/2666 ,  H04L27/2676

摘要： A guard section length detection method detects whether a preamble signal is received. A short preamble boundary is then detected, then detecting a frame boundary and detecting a guard section length. In the step of detecting the guard section length a second matched filter capable of processing 128 point data sets is detected. Four different 128 point data sets have a distance of 8 points, 16 points, 32 points, and 64 points respectively from the frame boundary to the second matched filter. Four signal correlation values are calculated for determining the guard section length.

摘要翻译： 保护部分长度检测方法检测是否接收到前置信号。 然后检测短的前导码边界，然后检测帧边界并检测保护段长度。 在检测保护段长度的步骤中，检测能够处理128点数据集的第二匹配滤波器。 四个不同的128点数据集分别具有从帧边界到第二匹配滤波器的8点，16点，32点和64点的距离。 计算四个信号相关值以确定防护段长度。

公开(公告)号：US07860178B2

公开(公告)日：2010-12-28

申请号：US11889958

申请日：2007-08-17

申请人： Chun-Chun Kuo ,  Chin-Hung Chen ,  Chao-Kai Wen ,  Pang-An Ting

发明人： Chun-Chun Kuo ,  Chin-Hung Chen ,  Chao-Kai Wen ,  Pang-An Ting

IPC分类号： H04K1/10

CPC分类号： H04L27/2662 ,  H04L27/2666 ,  H04L27/2676

摘要： A guard section length detection method is disclosed. In the method, a guard section length detection method is used in an OFDM system. The OFDM symbol includes a data interval having a first length, and a guard section having a guard section length. The method detects a first symbol boundary and a second symbol boundary, and determines the guard section length based on a length between the first symbol boundary and the second symbol boundary.

摘要翻译： 公开了一种防护部长度检测方法。 在该方法中，在OFDM系统中使用保护部分长度检测方法。 OFDM符号包括具有第一长度的数据间隔和具有保护部分长度的保护部分。 该方法检测第一符号边界和第二符号边界，并且基于第一符号边界和第二符号边界之间的长度来确定保护部分长度。

公开(公告)号：US08331482B2

公开(公告)日：2012-12-11

申请号：US12481880

申请日：2009-06-10

申请人： Lai-Huei Wang ,  Chia-Lung Tsai ,  Yu-Tao Hsieh ,  Pang-An Ting ,  Jen-Yuan Hsu

发明人： Lai-Huei Wang ,  Chia-Lung Tsai ,  Yu-Tao Hsieh ,  Pang-An Ting ,  Jen-Yuan Hsu

IPC分类号： H04L27/26 ,  H04L23/00

CPC分类号： H04L5/0048 ,  H04L1/0618 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0044

摘要： A subcarrier allocation method for use by a transmitter, the transmitter being configured to, when transmitting first and second data streams, allocate pilot symbols for the first and second data streams to subcarriers, such that a first plurality of subcarriers carry the pilot symbols for the first data stream and a second plurality of subcarriers carry the pilot symbols for the second data stream. The method includes allocating, when the transmitter transmits the first data stream but does not transmit the second data stream, the second plurality of subcarriers to carry no formation or information relating to the first data stream.

摘要翻译： 一种由发射机使用的副载波分配方法，所述发射机被配置为当发射第一和第二数据流时，将第一和第二数据流的导频符号分配给子载波，使得第一多个子载波携带用于 第一数据流和第二多个子载波携带用于第二数据流的导频符号。 该方法包括当发射机发送第一数据流但不发送第二数据流时，分配第二多个子载波，以不携带与第一数据流有关的形成或信息。

公开(公告)号：US08239710B2

公开(公告)日：2012-08-07

申请号：US12503584

申请日：2009-07-15

申请人： Chia-Lung Tsai ,  Yu-Tao Hsieh ,  Jen-Yuan Hsu ,  Pang-An Ting

发明人： Chia-Lung Tsai ,  Yu-Tao Hsieh ,  Jen-Yuan Hsu ,  Pang-An Ting

IPC分类号： G06F11/00

CPC分类号： H04K1/06 ,  H04L1/0071 ,  H04L5/0007 ,  H04L5/0044

摘要： A wireless communication method implemented in a communication system may include receiving a data sequence to be permuted, and obtaining information associated with the data sequence to be permuted, the information containing at least a length of the data sequence and a sampling spacing for permuting the data sequence. The method may also include identifying a first portion of the data sequence having a first number of adjacent data items, and a second portion of the data sequence having a second number of adjacent data items. The method may also include accessing the first number of data items from the first portion at the sampling spacing, and placing the accessed first number of data items into a predetermined number of sub-blocks included within a permuted data sequence to be generated based on the received data sequence. The method may further include inserting each of the second number of data items into an end position of one of the sub-blocks within the permuted data sequence, and outputting the permuted data sequence.

摘要翻译： 在通信系统中实现的无线通信方法可以包括接收要被置换的数据序列，以及获得与要被置换的数据序列相关联的信息，所述信息至少包含数据序列的长度和用于置换数据的采样间隔 序列。 该方法还可以包括识别具有第一数量的相邻数据项的数据序列的第一部分，以及具有第二数量的相邻数据项的数据序列的第二部分。 该方法还可以包括以采样间隔从第一部分访问第一数量的数据项，以及将所访问的第一数量的数据项放入包括在经置换的数据序列内的预定数量的子块中，以基于 接收数据序列。 该方法还可以包括将第二数量的数据项中的每一个插入置换的数据序列中的一个子块的结束位置，并输出置换的数据序列。

公开(公告)号：US08050366B2

公开(公告)日：2011-11-01

申请号：US12068507

申请日：2008-02-07

申请人： Chia-Tsung Lin ,  Yung-Yih Jian ,  Jen-Yuan Hsu ,  Pang-An Ting

发明人： Chia-Tsung Lin ,  Yung-Yih Jian ,  Jen-Yuan Hsu ,  Pang-An Ting

IPC分类号： H04L27/06 ,  H04L27/28 ,  H04B14/08

CPC分类号： H04L27/2663 ,  H04L27/2665 ,  H04L27/2679

摘要： A method and OFDM receiver for estimating timing offset are provided. The method includes receiving OFDM data to calculate frequency offset between a transmitter carrier frequency and a receiver carrier frequency, determining first timing offset based on the frequency offset, compensating the OFDM data with the first timing offset, estimating a residual common phase based on the compensated OFDM data, determining second timing offset based on the residual common phase, and compensating the OFDM data with the second timing offset, if the frame symbol index exceeds the predetermined data length.

摘要翻译： 提供了一种用于估计定时偏移的方法和OFDM接收器。 该方法包括接收OFDM数据以计算发射机载波频率和接收机载波频率之间的频率偏移，基于频率偏移确定第一定时偏移，利用第一定时偏移补偿OFDM数据，基于经补偿的估计估计残差公共相位 OFDM数据，如果帧符号索引超过预定数据长度，则基于所述残差公共相位确定第二定时偏移量，并补偿具有第二定时偏移量的OFDM数据。

公开(公告)号：US07809344B2

公开(公告)日：2010-10-05

申请号：US11785520

申请日：2007-04-18

申请人： Jiun-Yo Lai ,  Jen-Yuan Hsu ,  Yung-Yih Jian ,  Pang-An Ting

发明人： Jiun-Yo Lai ,  Jen-Yuan Hsu ,  Yung-Yih Jian ,  Pang-An Ting

IPC分类号： H04B1/10 ,  H04B15/06

CPC分类号： H04L27/266 ,  H04L27/2675

摘要： Fractional carrier frequency offset estimators and related methods are disclosed. The invention may be particularly applied in WiMAX systems. The disclosed method of estimating fractional carrier frequency offset between a transmitter and a receiver includes calculating a first delay correlation based on a first and a second preamble repetitions included in a received signal, processing the phase of the first delay correlation to compensate for a phase rotation of the first delay correlation, and estimating the fractional carrier frequency offset by multiplying a processed phase value, generated after the step of processing the phase of the first delay correlation, by a predetermined value.

摘要翻译： 公开了分数载波频率偏移估计量和相关方法。 本发明可以特别应用于WiMAX系统。 所公开的估计发射机和接收机之间的分数载波频率偏移的方法包括：基于包括在接收信号中的第一和第二前导码重复来计算第一延迟相关性，处理第一延迟相关的相位以补偿相位旋转 并且通过将处理所述第一延迟相关性的所述步骤之后产生的处理相位值乘以预定值来估计所述分数载波频率偏移。

公开(公告)号：US20090041161A1

公开(公告)日：2009-02-12

申请号：US11882918

申请日：2007-08-07

申请人： Yung-Yih Jian ,  Jen-Yuan Hsu ,  Huei-Jin Lin ,  Pang-An Ting

发明人： Yung-Yih Jian ,  Jen-Yuan Hsu ,  Huei-Jin Lin ,  Pang-An Ting

IPC分类号： H04L25/06 ,  H04L1/00

CPC分类号： H04L25/06 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2662

摘要： A DC offset estimation system is disclosed. A DC offset estimation system includes a carrier frequency offset estimator receiving an input signal and estimating a carrier frequency offset value, a symbol timing recovery unit providing a symbol boundary of the input signal, and a DC offset estimator estimating a DC offset value to compensate the input signal based on the input signal, the carrier frequency offset value, and the symbol boundary.

摘要翻译： 公开了一种DC偏移估计系统。 DC偏移估计系统包括接收输入信号并估计载波频率偏移值的载波频率偏移估计器，提供输入信号的符号边界的符号定时恢复单元和估计DC偏移值的DC偏移估计器，以补偿 基于输入信号的输入信号，载波频率偏移值和符号边界。

公开(公告)号：US20080019454A1

公开(公告)日：2008-01-24

申请号：US11785520

申请日：2007-04-18

申请人： Jiun-Yo Lai ,  Jen-Yuan Hsu ,  Yung-Yih Jian ,  Pang-An Ting

发明人： Jiun-Yo Lai ,  Jen-Yuan Hsu ,  Yung-Yih Jian ,  Pang-An Ting

IPC分类号： H04L23/02

CPC分类号： H04L27/266 ,  H04L27/2675

摘要： Fractional carrier frequency offset estimators and related methods are disclosed. The invention may be particularly applied in WiMAX systems. The disclosed method of estimating fractional carrier frequency offset between a transmitter and a receiver includes calculating a first delay correlation based on a first and a second preamble repetitions included in a received signal, processing the phase of the first delay correlation to compensate for a phase rotation of the first delay correlation, and estimating the fractional carrier frequency offset by multiplying a processed phase value, generated after the step of processing the phase of the first delay correlation, by a predetermined value.

摘要翻译： 公开了分数载波频率偏移估计量和相关方法。 本发明可以特别应用于WiMAX系统。 所公开的估计发射机和接收机之间的分数载波频率偏移的方法包括：基于包括在接收信号中的第一和第二前导码重复来计算第一延迟相关性，处理第一延迟相关的相位以补偿相位旋转 并且通过将处理所述第一延迟相关性的所述步骤之后产生的处理相位值乘以预定值来估计所述分数载波频率偏移。

公开(公告)号：US08218695B2

公开(公告)日：2012-07-10

申请号：US12243090

申请日：2008-10-01

申请人： Jen-Yuan Hsu ,  Lai-Huei Wang ,  Jiun-Yo Lai ,  Pang-An Ting

发明人： Jen-Yuan Hsu ,  Lai-Huei Wang ,  Jiun-Yo Lai ,  Pang-An Ting

IPC分类号： H03D1/04 ,  H03K9/00

CPC分类号： H04L27/2647 ,  H04L5/0007 ,  H04L5/0023 ,  H04L25/0212 ,  H04L25/0222 ,  H04L25/0226 ,  H04L25/0228 ,  H04L27/2607 ,  H04L27/2657 ,  H04L27/2662

摘要： A method for removing ICI for a received symbol is provided. Firstly, a transmitted symbol is received via a wireless channel within a symbol time so as to obtain the received symbol. The transmitted symbol includes P identical original partial data, wherein P is a positive integer larger than 1. The received symbol includes P received partial data corresponding to the original partial data, respectively. Next, on a time domain at least two of the P received partial data are copied so as to obtain at least two copied partial data. Each copied partial data includes P copies of its corresponding received partial data. After that, an estimated ICI of the time domain is determined according to the product of a predetermined constant array and the difference between the copied partial data. Afterwards, the estimated ICI is subtracted from the received symbol so as to obtain an output symbol.

摘要翻译： 提供了一种用于去除接收符号的ICI的方法。 首先，在符号时间内经由无线信道接收发送符号，以获得接收的符号。 所发送的符号包括P相同的原始部分数据，其中P是大于1的正整数。所接收的符号分别包括对应于原始部分数据的P个接收的部分数据。 接下来，在时域上复制P个接收到的部分数据中的至少两个，以获得至少两个复制的部分数据。 每个复制的部分数据包括其对应的接收的部分数据的P个副本。 之后，根据预定常数阵列的乘积和复制的部分数据之间的差异来确定时域的估计ICI。 之后，从接收到的符号中减去估计的ICI，以获得输出符号。