公开(公告)号：US08249518B2

公开(公告)日：2012-08-21

申请号：US11254172

申请日：2005-10-19

申请人： Stephen J. Grant ,  Jung-Fu Cheng ,  Yi-Pin Eric Wang ,  Karl J. Molnar ,  Leonld Krasny

发明人： Stephen J. Grant ,  Jung-Fu Cheng ,  Yi-Pin Eric Wang ,  Karl J. Molnar ,  Leonld Krasny

IPC分类号： H04B7/00 ,  H04W72/02

CPC分类号： H04B7/0645 ,  H04B1/71072 ,  H04B1/712 ,  H04B7/04 ,  H04B7/06 ,  H04B7/0632 ,  H04B7/0689 ,  H04B7/0691 ,  H04B7/0697 ,  H04B7/0891 ,  H04L1/06

摘要： In a selective MIMO system, the mobile station provides channel quality feedback for one or more possible transmission mode. The mobile station provides channel quality feedback for a first mode regardless of channel conditions and determines whether to provide feedback for one or more additional modes based on current channel conditions.

摘要翻译： 在选择性MIMO系统中，移动台为一个或多个可能的传输模式提供信道质量反馈。 无论频道条件如何，移动台都提供第一模式的信道质量反馈，并根据当前的信道状况确定是否为一个或多个附加模式提供反馈。

公开(公告)号：US08205127B2

公开(公告)日：2012-06-19

申请号：US12159730

申请日：2005-12-30

申请人： Lei Wan ,  Jung-Fu Cheng

发明人： Lei Wan ,  Jung-Fu Cheng

IPC分类号： G06F11/00

CPC分类号： H04L1/1809 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/1816 ,  H04L1/1845 ,  H04L1/1854

摘要： The present invention relates to automatic repeat request (ARQ) in wireless communication systems wherein a coded message block is spread over a plurality of sub-carriers or components. According to the invention an equalizing HARQ method is introduced. The equalizing HARQ identifies (215) and retransmits (230) the most distorted parts of a received coded message block. In addition, the retransmitted parts can optionally be relocated (225) to components of higher quality, which ensures good retransmission quality for those badly distorted parts in the prior transmission. After a soft-bit combination in a receiving node, the final received codeword experience an equalized quality variation with low multi-state performance loss.

摘要翻译： 本发明涉及无线通信系统中的自动重传请求（ARQ），其中编码的消息块分布在多个子载波或分量上。 根据本发明，引入均衡HARQ方法。 均衡HARQ识别（215）并重传（230）接收的编码消息块的最失真的部分。 此外，重传的部分可以可选地被重定位（225）到更高质量的组件，这确保了在先前传输中的那些严重失真的部分的良好的重传质量。 在接收节点中进行软比特组合之后，最终的接收码字体验到具有低多态性能损失的均衡质量变化。

公开(公告)号：US08201031B2

公开(公告)日：2012-06-12

申请号：US12491581

申请日：2009-06-25

申请人： Jung-Fu Cheng

发明人： Jung-Fu Cheng

IPC分类号： H03M13/27

CPC分类号： H04L1/0041 ,  H03M13/09 ,  H03M13/23 ,  H03M13/2778 ,  H03M13/2789 ,  H03M13/3938 ,  H03M13/6362 ,  H03M13/6508 ,  H03M13/6525

摘要： A system, method and node for unambiguous encoding of Physical Downlink Control Channel (PDCCH) channels in a Long Term Evolution (LTE) telecommunications system to remove detection errors. The method includes the step of modifying a size of a circular buffer by excluding at least one coded bit from the circular buffer. The circular buffer collects interleaved bits from a PDCCH payload having a plurality of bits. The PDCCH payload is encoded with a convolutional code. The bits of the PDCCH payload are then interleaved. The interleaved bits are collected into the modified circular buffer. The bits are then selected from the modified circular buffer for transmission.

摘要翻译： 用于长期演进（LTE）电信系统中的物理下行链路控制信道（PDCCH）信道的明确编码的系统，方法和节点，以消除检测错误。 该方法包括通过从循环缓冲器排除至少一个编码位来修改循环缓冲器的大小的步骤。 循环缓冲器从具有多个比特的PDCCH有效载荷收集交织比特。 PDCCH的有效载荷用卷积码进行编码。 然后将PDCCH有效载荷的比特交织。 交织的比特被收集到修改的循环缓冲器中。 然后从修改的循环缓冲器中选择位以进行传输。

公开(公告)号：US08009727B2

公开(公告)日：2011-08-30

申请号：US11676638

申请日：2007-02-20

申请人： Dennis Hui ,  Jung-Fu Cheng ,  Håkan B. Björkegren

发明人： Dennis Hui ,  Jung-Fu Cheng ,  Håkan B. Björkegren

IPC分类号： H04B1/10

CPC分类号： H04L25/03159 ,  H04L5/0007 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426

摘要： A method of equalizing a received signal compensates for frequency selectivity of the communication channel taking into account channel estimation errors. The method comprises generating channel estimates for the received signal, computing filter weights for an equalizer based on said channel estimates and a covariance of the channel estimation error, and filtering the received signal using the computed filter weights.

摘要翻译： 考虑到信道估计误差，均衡接收信号的方法补偿通信信道的频率选择性。 该方法包括生成接收信号的信道估计，基于所述信道估计和信道估计误差的协方差计算均衡器的滤波器权重，以及使用计算的滤波器权重对接收信号进行滤波。

公开(公告)号：US20110158359A1

公开(公告)日：2011-06-30

申请号：US12650219

申请日：2009-12-30

申请人： Ali S. Khayrallah ,  Gregory E. Bottomley ,  Jung-Fu Cheng

发明人： Ali S. Khayrallah ,  Gregory E. Bottomley ,  Jung-Fu Cheng

IPC分类号： H04L27/06 ,  H04B1/10

CPC分类号： H03M13/2987 ,  H03M13/2957 ,  H03M13/296 ,  H03M13/3707 ,  H03M13/6325 ,  H03M13/6561 ,  H03M13/658 ,  H03M13/6591 ,  H04L1/005 ,  H04L25/03286

摘要： An iterative demodulator and decoder uses feedback attenuation to maintain proper balance between the demodulator and decoder. Balance is maintained by attenuating the influence of extrinsic information fed back from the decoder to the demodulator to prevent strong decisions by the decoder from overwhelming the demodulator.

摘要翻译： 迭代解调器和解码器使用反馈衰减来维持解调器和解码器之间的适当平衡。 通过衰减从解码器反馈到解调器的外部信息的影响来维持平衡，以防止解码器强制解调器压倒解调器。

公开(公告)号：US07912433B2

公开(公告)日：2011-03-22

申请号：US12750793

申请日：2010-03-31

申请人： Karl Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

发明人： Karl Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

IPC分类号： H04B17/00

CPC分类号： H04L1/0019 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0202 ,  H04L25/0222 ,  H04L27/2647

摘要： A method and apparatus for generating channel quality information, such as may be used for transmit link adaptation, provide different operating modes, such as a first mode that may be used when propagation channel estimates are not reliable, and a second mode that may be used when the propagation channel estimates are reliable. In one or more embodiments, channel quality information is generated using receiver performance information that characterizes receiver performance in terms of a defined channel quality metric, e.g., supported data rates, for different values of receiver input signal quality over a range of propagation channel realizations. Channel quality information can be generated by selecting channel quality metrics according to receiver input signal quality and a desired probability of meeting a defined performance requirement over a range of propagation channel realizations, or by selecting channel quality metrics according to receiver input signal quality and particularized propagation channel realizations.

摘要翻译： 用于产生信道质量信息的方法和装置，例如可以用于发送链路自适应，提供不同的操作模式，例如当传播信道估计不可靠时可以使用的第一模式，以及可以使用的第二模式 当传播信道估计是可靠的。 在一个或多个实施例中，使用接收机性能信息来生成信道质量信息，所述接收机性能信息根据定义的信道质量度量（例如，支持的数据速率），在传播信道实现范围内针对接收机输入信号质量的不同值来表征接收机性能。 可以通过根据接收机输入信号质量选择信道质量度量并且在传播信道实现范围内满足定义的性能要求的期望概率，或者通过根据接收机输入信号质量和特定传播选择信道质量度量来生成信道质量信息 渠道实现。

公开(公告)号：US20100199141A1

公开(公告)日：2010-08-05

申请号：US12663459

申请日：2008-05-09

申请人： Stefan Parkvall ,  Jung-Fu Cheng

发明人： Stefan Parkvall ,  Jung-Fu Cheng

IPC分类号： H04L1/18 ,  H03M13/00 ,  G06F11/00 ,  G06F11/16

CPC分类号： H04L1/1822 ,  H04L1/1819 ,  H04L1/1825 ,  H04L1/1835 ,  H04L1/1845

摘要： A first transceiver that supports hybrid Automatic Repeat Request (hybrid ARQ) functionality is operated. Initially, it is operated to transmit data blocks having a nominal maximum data block size, M0. In response to detecting that a second transceiver does not have sufficient soft buffer memory space to store data blocks associated with an anticipated number of active hybrid ARQ processes, the transceiver is operated to transmit data blocks having a reduced data block size, M′. The anticipated number of active hybrid ARQ processes can be, for example, higher than a nominal number of active hybrid ARQ processes.

摘要翻译： 支持混合自动重传请求（Hybrid ARQ）功能的第一个收发器。 最初，它被操作以发送具有标称最大数据块大小M0的数据块。 响应于检测到第二收发器不具有足够的软缓冲存储器空间来存储与预期数量的主动混合ARQ过程相关联的数据块，所述收发器被操作以发送具有减小的数据块大小M'的数据块。 主动混合ARQ过程的预期数量可以例如高于活动混合ARQ过程的标称数量。

公开(公告)号：US20100183064A1

公开(公告)日：2010-07-22

申请号：US12750793

申请日：2010-03-31

申请人： Karl James Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

发明人： Karl James Molnar ,  Jung-Fu Cheng ,  Stephen J. Grant ,  Leonid Krasny ,  Yi-Pin Eric Wang

IPC分类号： H04B17/00

CPC分类号： H04L1/0019 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0202 ,  H04L25/0222 ,  H04L27/2647

摘要： A method and apparatus for generating channel quality information, such as may be used for transmit link adaptation, provide different operating modes, such as a first mode that may be used when propagation channel estimates are not reliable, and a second mode that may be used when the propagation channel estimates are reliable. In one or more embodiments, channel quality information is generated using receiver performance information that characterizes receiver performance in terms of a defined channel quality metric, e.g., supported data rates, for different values of receiver input signal quality over a range of propagation channel realizations. Channel quality information can be generated by selecting channel quality metrics according to receiver input signal quality and a desired probability of meeting a defined performance requirement over a range of propagation channel realizations, or by selecting channel quality metrics according to receiver input signal quality and particularized propagation channel realizations.

摘要翻译： 用于产生信道质量信息的方法和装置，例如可以用于发送链路自适应，提供不同的操作模式，例如当传播信道估计不可靠时可以使用的第一模式，以及可以使用的第二模式 当传播信道估计是可靠的。 在一个或多个实施例中，使用接收机性能信息来生成信道质量信息，所述接收机性能信息根据定义的信道质量度量（例如，支持的数据速率），在传播信道实现范围内针对接收机输入信号质量的不同值来表征接收机性能。 可以通过根据接收机输入信号质量选择信道质量度量并且在传播信道实现范围内满足定义的性能要求的期望概率，或者通过根据接收机输入信号质量和特定传播选择信道质量度量来生成信道质量信息 渠道实现。

公开(公告)号：US07673211B2

公开(公告)日：2010-03-02

申请号：US11383830

申请日：2006-05-17

申请人： Michael Meyer ,  Henning Wiemann ,  Johan Torsner ,  Mats Sagfors ,  Jung-Fu Cheng

发明人： Michael Meyer ,  Henning Wiemann ,  Johan Torsner ,  Mats Sagfors ,  Jung-Fu Cheng

IPC分类号： G08C25/02 ,  H04L1/18

CPC分类号： H04L1/1848 ,  H04L1/1607 ,  H04L1/1678 ,  H04L1/1812 ,  H04L1/1829 ,  H04L1/1874 ,  H04L2001/0096 ,  H04L2001/125

摘要： Methods for efficiently controlling the retransmission of data units in a wireless telecommunication system, wherein multiple complementary feedback mechanisms are used to control retransmission. A receiver attempts to decode each received data unit. If a data unit is successfully decoded, the receiver transmits positive feedback to the transmitter; if a data unit is not successfully decoded, the receiver transmits negative feedback to the transmitter. In all cases, the transmitter employs at least first and second feedback mechanisms for transmitting the positive and negative feedback. In an exemplary embodiment, acknowledgement (ACK) and non-acknowledgement (NACK) messages are sent in response to the receipt of each data unit on a first unreliable channel and Status Messages identifying sequence numbers of particular data units are periodically transmitted on a second reliable channel; the receiver preferably removes data units from its transmit window only upon receipt of a Status Message indicating successful decode.

摘要翻译： 用于有效地控制无线电信系统中的数据单元重传的方法，其中使用多个互补反馈机制来控制重传。 接收机尝试对每个接收到的数据单元进行解码。 如果数据单元成功解码，则接收机向发射机发送正反馈; 如果数据单元未成功解码，则接收机向发射机发送负反馈。 在所有情况下，发射机至少采用第一和第二反馈机制来发送正反馈。 在示例性实施例中，响应于在第一不可靠信道上接收每个数据单元而发送确认（ACK）和非确认（NACK）消息，并且识别特定数据单元的序列号的状态消息在第二可靠 渠道; 只有在接收到指示成功解码的状态消息时，接收器才优选地从其发送窗口去除数据单元。

公开(公告)号：US07668227B2

公开(公告)日：2010-02-23

申请号：US11443883

申请日：2006-05-31

申请人： Stephen J. Grant ,  Jung-Fu Cheng ,  Leonid Krasny ,  Karl J. Molnar ,  Yi-Pin Eric Wang

发明人： Stephen J. Grant ,  Jung-Fu Cheng ,  Leonid Krasny ,  Karl J. Molnar ,  Yi-Pin Eric Wang

IPC分类号： H04B1/00

CPC分类号： H04B1/712 ,  H04B1/7103 ,  H04B1/711 ,  H04B7/04 ,  H04B2201/709727

摘要： A receiver reduces interference in a received symbol of interest attributable to an interfering symbol using knowledge of the symbol spreading codes. The receiver comprises a plurality of correlators generating despread values for the received symbol of interest and the interfering symbol, and a combiner to combine the despread values using combining weights calculated based on spreading code correlations between spreading codes for the received symbol of interest and the interfering symbol.

摘要翻译： 接收机使用符号扩展码的知识来减少归因于干扰符号的接收的感兴趣的符号中的干扰。 接收机包括多个相关器，用于产生所接收的感兴趣符号和干扰符号的解扩值，以及组合器，使用基于用于所接收的感兴趣符号的扩展码与干扰信号之间的扩展码相关性计算的组合权重组合去扩展值 符号。