公开(公告)号：US20070067696A1

公开(公告)日：2007-03-22

申请号：US11222008

申请日：2005-09-08

申请人： Tejas Bhatt ,  Victor Stolpman ,  Dennis McCain

发明人： Tejas Bhatt ,  Victor Stolpman ,  Dennis McCain

IPC分类号： H03M13/00

CPC分类号： H03M13/271 ,  H03M13/296

摘要： A system, transmitter, receiver, method, and computer program product are provided in which a plurality of structured interleavers permute data bits arranged in a data bit matrix for Zigzag encoding. For each interleaver, the data bits in each column of the data bit matrix are cyclically shifted, with the amount of the shift being predefined and different for each column. In addition to the cycle shift, each column may be bit reverse ordered, and entire columns may be swapped. The interleaved data bit matrix may then be encoded using a Zigzag encoder to generate parity bits that may be transmitted, along with the data bits, from a transmitter to a receiver where the data may be iteratively decoded.

摘要翻译： 提供了一种系统，发射机，接收机，方法和计算机程序产品，其中多个结构化交织器将配置在数据位矩阵中的数据位置换为Z字形编码。 对于每个交织器，数据位矩阵的每列中的数据位被循环移位，其中移位量预定义并且对于每列是不同的。 除了循环移位之外，每一列都可以是反向排序的，并且整个列可以被交换。 然后可以使用Zigzag编码器对交织的数据位矩阵进行编码，以产生可以与数据比特一起从发射机发送到可以迭代地解码数据的接收机的奇偶校验位。

公开(公告)号：US20070089016A1

公开(公告)日：2007-04-19

申请号：US11253207

申请日：2005-10-18

申请人： Tejas Bhatt ,  Vishwas Sundaramurthy ,  Victor Stolpman ,  Dennis McCain

发明人： Tejas Bhatt ,  Vishwas Sundaramurthy ,  Victor Stolpman ,  Dennis McCain

IPC分类号： H03M13/00

CPC分类号： H03M13/1145 ,  H03M13/1111 ,  H03M13/1117 ,  H03M13/1122 ,  H03M13/1131

摘要： An error correction decoder for block serial pipelined layered decoding of block codes includes primary and mirror memories that are each capable of storing log-likelihood ratios (LLRs) for one or more iterations of an iterative decoding technique. The decoder also includes a plurality of elements capable of processing, for one or more iterations, one or more layers of a parity-check matrix. The elements include an iterative decoder element capable of calculating, for one or more iterations or layers, a LLR adjustment based upon the LLR for a previous iteration/layer, the LLR for the previous iteration/layer being read from the primary memory. The decoder further includes a summation element capable of reading the LLR for the previous iteration/layer from the mirror memory, and calculating the LLR for the iteration/layer based upon the LLR adjustment for the iteration/layer and the previous iteration/layer LLR for the previous iteration/layer.

摘要翻译： 用于块码的块串行流水线分层解码的纠错解码器包括主存储器和镜像存储器，每个存储器能够存储用于迭代解码技术的一次或多次迭代的对数似然比（LLR）。 解码器还包括能够对一个或多个迭代处理奇偶校验矩阵的一个或多个层的多个元件。 元素包括迭代解码器元件，其能够针对一个或多个迭代或层来计算基于先前迭代/层的LLR的LLR调整，从主存储器读取先前迭代/层的LLR。 解码器还包括能够从镜像存储器读取先前迭代/层的LLR并且基于迭代/层和先前的迭代/层LLR的LLR调整来计算迭代/层的LLR的求和元素，用于 以前的迭代/层。

公开(公告)号：US07689892B2

公开(公告)日：2010-03-30

申请号：US11574792

申请日：2005-09-07

申请人： Victor Stolpman ,  Tejas Bhatt ,  Nico van Waes ,  Jian Zhong Zhang ,  Amitabh Dixit

发明人： Victor Stolpman ,  Tejas Bhatt ,  Nico van Waes ,  Jian Zhong Zhang ,  Amitabh Dixit

IPC分类号： H03M13/00

CPC分类号： H03M13/116 ,  H03M13/1148 ,  H03M13/353

摘要： A method of adaptive error correction coding includes processing data during a connection between a transmitting entity and a receiving entity, where the data is processed in accordance with a predetermined coding scheme. More particularly, processing data includes encoding one or more sequences received by an error correction encoder of the transmitting entity, or decoding one or more block codes received by an error correction decoder of the receiving entity. During the connection, then, the method includes selecting or receiving a selection of feedback code information. Thus, during at least a portion of the connection, the data processing is switched to processing data in accordance with a parity-check coding technique based upon the feedback code information.

摘要翻译： 一种自适应纠错编码的方法包括在发送实体和接收实体之间的连接期间处理数据，其中根据预定编码方案对数据进行处理。 更具体地，处理数据包括编码由发送实体的纠错编码器接收的一个或多个序列，或者解码由接收实体的纠错解码器接收的一个或多个块码。 在连接期间，该方法包括选择或接收反馈代码信息的选择。 因此，在连接的至少一部分期间，基于反馈代码信息，根据奇偶校验编码技术将数据处理切换到处理数据。

公开(公告)号：US20080022191A1

公开(公告)日：2008-01-24

申请号：US11574792

申请日：2005-09-07

申请人： Victor Stolpman ,  Tejas Bhatt ,  Nico van Waes ,  Jian Zhong Zhang ,  Amitabh Dixit

发明人： Victor Stolpman ,  Tejas Bhatt ,  Nico van Waes ,  Jian Zhong Zhang ,  Amitabh Dixit

IPC分类号： H03M13/11

CPC分类号： H03M13/116 ,  H03M13/1148 ,  H03M13/353

摘要： A method of adaptive error correction coding includes processing data during a connection between a transmitting entity and a receiving entity, where the data is processed in accordance with a predetermined coding scheme. More particularly, processing data can include encoding one or more sequences received by an error correction encoder of the transmitting entity, or decoding one or more block codes received by an error correction decoder of the receiving entity. During the connection, then, the method can include selecting or receiving a selection of feedback code information. Thus, during at least a portion of the connection, the data processing can be switched to processing data in accordance with a parity-check coding technique based upon the feedback code information.

摘要翻译： 一种自适应纠错编码的方法包括在发送实体和接收实体之间的连接期间处理数据，其中根据预定编码方案对数据进行处理。 更具体地，处理数据可以包括编码由发送实体的纠错编码器接收的一个或多个序列，或者对由接收实体的纠错解码器接收的一个或多个块代码进行解码。 在连接期间，该方法可以包括选择或接收反馈代码信息的选择。 因此，在连接的至少一部分期间，可以基于反馈代码信息，根据奇偶校验编码技术将数据处理切换到处理数据。

公开(公告)号：US20070198905A1

公开(公告)日：2007-08-23

申请号：US11346184

申请日：2006-02-03

申请人： Tejas Bhatt ,  Amitabh Dixit ,  Victor Stolpman

发明人： Tejas Bhatt ,  Amitabh Dixit ,  Victor Stolpman

IPC分类号： G06F11/00 ,  H03M13/00

CPC分类号： H03M13/116 ,  H03M13/118

摘要： A transmitter for a communications network, the transmitter comprising: receiving means for receiving data; accessing means for accessing a parity check code; generating means for generating encoded data including an error correction codeword using the data and the parity check code; and transmitting means for transmitting the encoded data and the error correction codeword, wherein the parity check code comprises a parity check matrix which, in expanded form, can be represented by the matrix H having the general structure ( A B T C D E ) ⁢ ` wherein A, B, T, C, D and E represent sub-matrices, ET−1B being equal to the null matrix, the generating means comprising summing circuitry arranged to receive matrix elements ET−1A and C to generate a sum, and matrix multiplication circuitry for receiving the sum, a matrix element D−1 and a matrix sT comprising the data, the matrix multiplication circuitry being operable to generate a parity part p1T of the error correction codeword according to the formula p1T=−D−1(−ET−1A+C)sT.

公开(公告)号：US07613104B2

公开(公告)日：2009-11-03

申请号：US11444735

申请日：2006-05-31

申请人： Tejas Bhatt ,  Vishwas Sundaramurthy ,  Jianzhong Zhang ,  Dennis McCain

发明人： Tejas Bhatt ,  Vishwas Sundaramurthy ,  Jianzhong Zhang ,  Dennis McCain

IPC分类号： H04J11/00

CPC分类号： H04L27/2656 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2678

摘要： Disclosed is a method, a computer program product and a device that includes a receiver for receiving a downlink signal transmitted into a cell. The receiver is operable to obtain time, carrier frequency and cell-specific preamble synchronization to the received signal and includes a plurality of synchronization units that include a first detector to detect a frame boundary using preamble delay correlation; a second detector to detect the frame boundary with greater precision using a conjugate symmetry property over a region identified by the first detector; a cyclic prefix correlator to resolve symbol boundary repetition; an estimator, using the cyclic prefix, to estimate and correct a fractional carrier frequency offset; an operator to perform a Fast Fourier Transform of an identified preamble symbol and a frequency domain cross-correlator to identify cell-specific preamble sequences and an integer frequency offset in sub-carrier spacing. The transmitted signal may be a downlink signal transmitted into the cell from a base station that is compatible with IEEE 802.16e (WiMAX).

摘要翻译： 公开了一种方法，计算机程序产品和设备，其包括用于接收发送到小区中的下行链路信号的接收机。 接收机可操作以获得对接收信号的时间，载波频率和小区特定前导码同步，并且包括多个同步单元，其包括使用前导延迟相关来检测帧边界的第一检测器; 第二检测器，使用在由第一检测器识别的区域上的共轭对称性检测更高精度的帧边界; 用于解析符号边界重复的循环前缀相关器; 使用循环前缀的估计器来估计和校正分数载波频率偏移; 执行所识别的前导码符号的快速傅立叶变换和频域交叉相关器以识别小区特定前导码序列和子载波间隔中的整数频率偏移的运算符。 所发送的信号可以是从与IEEE 802.16e（WiMAX）兼容的基站发送到小区的下行链路信号。

公开(公告)号：US20070280098A1

公开(公告)日：2007-12-06

申请号：US11444735

申请日：2006-05-31

申请人： Tejas Bhatt ,  Vishwas Sundaramurthy ,  Jianzhong Zhang ,  Dennis McCain

发明人： Tejas Bhatt ,  Vishwas Sundaramurthy ,  Jianzhong Zhang ,  Dennis McCain

IPC分类号： H04J11/00

CPC分类号： H04L27/2656 ,  H04L27/2659 ,  H04L27/266 ,  H04L27/2662 ,  H04L27/2675 ,  H04L27/2678

摘要： Disclosed is a method, a computer program product and a device that includes a receiver for receiving a downlink signal transmitted into a cell. The receiver is operable to obtain time, carrier frequency and cell-specific preamble synchronization to the received signal and includes a plurality of synchronization units that include a first detector to detect a frame boundary using preamble delay correlation; a second detector to detect the frame boundary with greater precision using a conjugate symmetry property over a region identified by the first detector; a cyclic prefix correlator to resolve symbol boundary repetition; an estimator, using the cyclic prefix, to estimate and correct a fractional carrier frequency offset; an operator to perform a Fast Fourier Transform of an identified preamble symbol and a frequency domain cross-correlator to identify cell-specific preamble sequences and an integer frequency offset in sub-carrier spacing. The transmitted signal may be a downlink signal transmitted into the cell from a base station that is compatible with IEEE 802.16e (WiMAX).

摘要翻译： 公开了一种方法，计算机程序产品和设备，其包括用于接收发送到小区中的下行链路信号的接收机。 接收机可操作以获得对接收信号的时间，载波频率和小区特定前导码同步，并且包括多个同步单元，其包括使用前导延迟相关来检测帧边界的第一检测器; 第二检测器，使用在由第一检测器识别的区域上的共轭对称性检测更高精度的帧边界; 用于解析符号边界重复的循环前缀相关器; 使用循环前缀的估计器来估计和校正分数载波频率偏移; 执行所识别的前导码符号的快速傅立叶变换和频域交叉相关器以识别小区特定前导码序列和子载波间隔中的整数频率偏移的运算符。 所发送的信号可以是从与IEEE 802.16e（WiMAX）兼容的基站发送到小区的下行链路信号。

公开(公告)号：US08165073B2

公开(公告)日：2012-04-24

申请号：US11888800

申请日：2007-08-02

申请人： Shu-Shaw Wang ,  Adrian Boariu ,  Shashikant Maheshwari ,  Tejas Bhatt ,  Anthony Reid

发明人： Shu-Shaw Wang ,  Adrian Boariu ,  Shashikant Maheshwari ,  Tejas Bhatt ,  Anthony Reid

IPC分类号： H04W4/00

CPC分类号： H04W36/20 ,  H04B7/15542 ,  H04B7/2606 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0048 ,  H04L5/0094 ,  H04W16/06 ,  H04W16/10 ,  H04W16/26 ,  H04W36/22 ,  H04W48/08 ,  H04W52/244 ,  H04W52/40 ,  H04W52/46 ,  H04W72/08 ,  H04W72/082 ,  H04W72/085 ,  H04W84/047 ,  H04W88/04 ,  H04W92/20

摘要： A prospective relay station sends a report indicative of radio resource sets/preamble sequences used by its neighbors. Where the reported radio resource sets comprise less than all available radio resource sets, a radio resource set that is not indicated in the report is assigned; else where the reported radio resource sets comprise all available radio resource sets, a resource set indicated in the report is assigned. A message is sent to the prospective relay station indicates the assigned radio resource set and an identifier for use as an enabled relay station. The message may include signal strength and IDs. Apparatus, methods and computer programs are detailed for both a base station and the relay node. Radio resource set re-assignment, managed mode relay operations (where the base station schedules traffic among relays using the same radio resource set), and power control of relays and associated mobile stations are also described.

摘要翻译： 前瞻性中继站发送指示其邻居使用的无线电资源集/前导码序列的报告。 在报告的无线电资源集合包括小于所有可用无线电资源集合的情况下，分配报告中未指示的无线电资源集合; 否则报告的无线电资源集合包括所有可用无线资源集合的情况下，分配报告中指示的资源集。 发送到预期中继站的消息指示分配的无线电资源集合和用作启用中继站的标识符。 该消息可以包括信号强度和ID。 装置，方法和计算机程序对于基站和中继节点都是详细的。 还描述了无线电资源集重新分配，管理模式中继操作（其中基站使用相同的无线电资源集合在中继器之间调度业务）以及中继站和相关联的移动站的功率控制。

公开(公告)号：US20090141676A1

公开(公告)日：2009-06-04

申请号：US11939999

申请日：2007-11-14

申请人： Shashikant Maheshwari ,  Tejas Bhatt

发明人： Shashikant Maheshwari ,  Tejas Bhatt

IPC分类号： H04W72/14 ,  H04L12/28

CPC分类号： H04L1/1812 ,  H04L1/1887 ,  H04L2001/0092 ,  H04W28/26

摘要： An approach provides an error-control scheme within a multi-hop relay network. A determination is made of a first node that failed to transmit a packet generated according to an error-control scheme, wherein the first node is among a plurality of nodes configured to operate in a multi-hop network. Resources of the multi-hop network are reserved only for retransmission of the packet from the first node towards a destination node that is included in the plurality of nodes.

摘要翻译： 一种方法在多跳中继网络内提供错误控制方案。 确定不能发送根据错误控制方案生成的分组的第一节点，其中第一节点在被配置为在多跳网络中操作的多个节点之中。 多跳网络的资源仅被保留用于从包括在多个节点中的从第一节点到目的地节点的分组的重传。

公开(公告)号：US08724525B2

公开(公告)日：2014-05-13

申请号：US12204789

申请日：2008-09-04

申请人： Adrian Boariu ,  Shashikant Maheshwari ,  Tejas Bhatt

发明人： Adrian Boariu ,  Shashikant Maheshwari ,  Tejas Bhatt

IPC分类号： H04J3/00

CPC分类号： H04W56/003 ,  H04B7/155 ,  H04B7/2656 ,  H04W28/10 ,  H04W56/005 ,  H04W72/04 ,  H04W84/047

摘要： Methods and apparatus for synchronizing frames in wireless networks are disclosed. An example method includes delaying, at a wireless relay station, a start time of a frame. In the example method, the start time of the frame is delayed, such that the relay station receives one or more data symbols from a superordinate wireless station and one or more data symbols from a subordinate wireless station at substantially the same time during the frame.

摘要翻译： 公开了用于在无线网络中同步帧的方法和装置。 示例性方法包括在无线中继站处延迟帧的开始时间。 在示例性方法中，帧的开始时间被延迟，使得中继站在帧期间基本上同时从上级无线站接收一个或多个数据符号和来自下属无线站的一个或多个数据符号。