利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

186 条记录 (耗时 0.026 秒)

    Facilitating Synchronization Between a Base Station and a User Equipment
    41.
    发明申请
    Facilitating Synchronization Between a Base Station and a User Equipment 审中-公开

    公开(公告)号：US20180124721A1

    公开(公告)日：2018-05-03

    申请号：US15856871

    申请日：2017-12-28

    申请人： Huawei Technologies Co., Ltd.

    发明人： Fredrik Berggren

    IPC分类号： H04W56/00 ,  H04W88/08 ,  H04W88/04 ,  H03M13/33 ,  H04L7/04 ,  H04J13/00 ,  H04B1/7083

    摘要： Methods and apparatus are provided for facilitating synchronization between a base station (BS) and a user equipment (UE) in a mobile communication system. The UE receives a synchronization signal originated by the BS. The synchronization signal is encoded with a selected cyclically permutable (CP) codeword. Encoding of the synchronization signal is facilitated by a repetitive cyclically permutable (RCP) codeword derivable from the selected CP codeword. The RCP codeword has a plurality of codeword elements each associated with a value, the value of at least one codeword element in the RCP codeword being repeated in another codeword element position in the RCP codeword. And the synchronization signal is decoded in accordance with repetitive structure of the RCP codeword.

    Scheduling for LDPC decoding
    45.
    发明授权
    Scheduling for LDPC decoding 有权
    LDPC解码调度

    公开(公告)号：US08504890B2

    公开(公告)日：2013-08-06

    申请号：US11876868

    申请日：2007-10-23

    申请人： Eran Sharon ,  Simon Litsyn

    发明人： Eran Sharon ,  Simon Litsyn

    IPC分类号： H03M13/37 ,  H03M13/33

    CPC分类号： H03M13/1137 ,  H03M13/1131 ,  H03M13/114

    摘要： A codeword is decoded by receiving a codeword representation that includes a plurality of soft bits and iteratively updating the soft bits. Whether each soft bit participates in at least some iterations is determined according to a selection criterion, e.g., probabilistically, or according to iteration number, or according to the soft bit's iteration history. For example, each soft bit might participate in some or all iterations with a probability that is a function of both the iteration number and a reliability measure of that soft bit. Preferably, the iterations are LDPC iterations in which variable nodes are addressed sequentially for exchanging messages with corresponding check nodes.

    摘要翻译： 通过接收包括多个软比特并迭代地更新软比特的码字表示来解码码字。 每个软比特是否参与至少一些迭代，根据选择标准，例如概率地，或根据迭代次数，或根据软比特迭代历史来确定。 例如，每个软比特可能参与一些或所有迭代，其概率是该软比特的迭代次数和可靠性度量的函数。 优选地，迭代是LDPC迭代，其中可变节点被顺序寻址以与对应的校验节点交换消息。

    Apparatus and method for processing received data in a broadband wireless communication system
    46.
    发明授权
    Apparatus and method for processing received data in a broadband wireless communication system 失效
    用于在宽带无线通信系统中处理接收数据的装置和方法

    公开(公告)号：US08176379B2

    公开(公告)日：2012-05-08

    申请号：US11903090

    申请日：2007-09-20

    申请人： Hyun-Sang Cho ,  Sang-Hyo Kim ,  Joong-Ho Jeong ,  Bong-Gee Song

    发明人： Hyun-Sang Cho ,  Sang-Hyo Kim ,  Joong-Ho Jeong ,  Bong-Gee Song

    IPC分类号： H03M13/17 ,  H03M13/33

    CPC分类号： H04L1/0039 ,  H04L1/0004 ,  H04L1/001 ,  H04L1/0025 ,  H04L1/0052 ,  H04L1/1812 ,  H04L1/1835

    摘要： A method for processing data of a received frame in a receiver of a broadband wireless communication system. The received data processing method includes extracting, from control information for data of one frame having multiple bursts, burst sizes of bursts constituting the frame and modulation scheme information applied to the frame; assigning burst identifiers (IDs) used for identifying the bursts, and assigning burst partial IDs to data concatenations having concatenation sizes based on the burst sizes and the modulation scheme information; forming, in a memory, burst regions for storing the data concatenations according to the burst IDs; dividing received data of one slot included in the frame into data concatenations based on the concatenation sizes, and decoding the data concatenations; and sequentially storing the decoded data concatenations in the memory according to a burst ID and a burst partial ID corresponding to each of the decoded data concatenations.

    摘要翻译： 一种用于处理宽带无线通信系统的接收机中的接收帧的数据的方法。 所接收的数据处理方法包括：从具有多个突发的一个帧的数据的控制信息中提取构成该帧的脉冲串的突发大小以及应用于该帧的调制方案信息; 分配用于识别脉冲串的脉冲串标识符（ID），以及将突发部分ID分配给具有基于脉冲串大小和调制方案信息的级联大小的数据级联; 在存储器中形成用于根据突发ID存储数据级联的突发区域; 将包含在帧中的一个时隙的接收数据根据级联大小划分为数据级联，并解码数据级联; 并且根据与每个解码数据级联相对应的突发ID和突发部分ID，顺序地将解码的数据级联存储在存储器中。

    RDS COMPATIBLE RECEIVER AND RDS DATA RECEIVING METHOD
    47.
    发明申请
    RDS COMPATIBLE RECEIVER AND RDS DATA RECEIVING METHOD 失效
    RDS兼容接收机和RDS数据接收方法

    公开(公告)号：US20090106629A1

    公开(公告)日：2009-04-23

    申请号：US12255374

    申请日：2008-10-21

    申请人： Yoshitsugu Araki

    发明人： Yoshitsugu Araki

    IPC分类号： H03M13/33 ,  G06F11/00

    CPC分类号： H03M13/333 ,  H04H2201/13

    摘要： An RDS compatible receiver has a demodulator which demodulates RDS data, a register which converts the demodulated RDS data to block data and outputs the block data, an offset generating unit which predicts and outputs an offset word of the block data based on values of a pattern match flag signal and a synchronization flag signal, an error correction processing unit which performs error correction of the block data using the predicted offset word, compares the number of error corrections with a predetermined correction threshold, determines whether the predicted offset word is right or not based on the comparison result, and outputs the pattern match flag signal based on the determination result, and a synchronization determining unit which detects whether or not the predicted offset word determined to be right matches a predetermined offset sequence pattern, determines whether RDS block synchronization is established or not, and outputs the synchronization flag signal based on the determination result.

    摘要翻译： RDS兼容接收机具有对RDS数据进行解调的解调器，将解调后的RDS数据转换为块数据并输出块数据的寄存器;偏移生成单元，其根据图案的值预测并输出块数据的偏移字 匹配标志信号和同步标志信号，使用预测偏移字执行块数据的纠错的纠错处理单元将误差校正次数与预定校正阈值进行比较，确定预测偏移字是否正确 根据比较结果，根据判定结果输出模式匹配标志信号，同步判定部，检测判定为正确的预测偏移字是否与规定的偏移序列模式一致，判定RDS块同步是否为 建立或不建立，并且基于de来输出同步标志信号 终止结果。

    Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme
    49.
    发明申请
    Method and apparatus for providing signal acquisition and frame synchronization in a hierarchical modulation scheme 有权
    用于在分级调制方案中提供信号采集和帧同步的方法和装置

    公开(公告)号：US20050089068A1

    公开(公告)日：2005-04-28

    申请号：US10819668

    申请日：2004-04-07

    申请人： Feng-Wen Sun ,  Lin-Nan Lee

    发明人： Feng-Wen Sun ,  Lin-Nan Lee

    IPC分类号： H04L7/00 ,  H03M13/11 ,  H03M13/25 ,  H03M13/33 ,  H04H20/00 ,  H04H20/74 ,  H04J3/06 ,  H04L1/00 ,  H04L7/04 ,  H04L27/18 ,  H04L27/227 ,  H04L27/34 ,  H04N7/12 ,  H04N7/20

    CPC分类号： H04L1/0057 ,  H03M13/1165 ,  H03M13/255 ,  H04H20/74 ,  H04L1/0041 ,  H04L7/048 ,  H04L27/183

    摘要： An approach is provided for supporting signal acquisition and frame synchronization in a digital broadcast system utilizing Low Density Parity Check (LDPC) codes. Hierarchical modulation is utilized to provide backward compatibility, whereby the lower layer signal is encoded using LDPC coding. A signal is received, whereby the signal is modulated according to the hierarchical modulation scheme including an upper layer and a lower layer. The signal includes a data pattern and a coded frame. The dependency of the received signal on the upper layer modulation is removed. The modulation removed signal is correlated with multiple predetermined data patterns to determine the data pattern of the signal. The code rate of the coded frame is derived based on the determined data pattern. The above arrangement is particularly suited to a digital satellite broadcast system.

    摘要翻译： 提供了一种在使用低密度奇偶校验（LDPC）码的数字广播系统中支持信号采集和帧同步的方法。 利用层次调制来提供向后兼容性，由此使用LDPC编码对低层信号进行编码。 接收信号，由此根据包括上层和下层的分级调制方案对信号进行调制。 信号包括数据模式和编码帧。 消除了接收信号对上层调制的依赖性。 调制去除信号与多个预定数据模式相关，以确定信号的数据模式。 基于确定的数据模式导出编码帧的码率。 上述布置特别适用于数字卫星广播系统。

    Method and device for determining thresholds of metric values used in Viterbi synchronization evaluation circuits
    50.
    发明授权
    Method and device for determining thresholds of metric values used in Viterbi synchronization evaluation circuits 失效
    用于确定在维特比同步评估电路中使用的度量值的阈值的方法和装置

    公开(公告)号：US6092234A

    公开(公告)日：2000-07-18

    申请号：US957952

    申请日：1997-10-27

    申请人： Hiroshi Azakami ,  Masahiro Hamada ,  Yoshikazu Hayashi ,  Takashi Hasegawa ,  Noriaki Omoto

    发明人： Hiroshi Azakami ,  Masahiro Hamada ,  Yoshikazu Hayashi ,  Takashi Hasegawa ,  Noriaki Omoto

    IPC分类号： H03M13/33 ,  H03M13/41 ,  H03M13/03

    CPC分类号： H03M13/6508 ,  H03M13/33 ,  H03M13/41

    摘要： A method and device determines the metric value threshold used in a Viterbi synchronization evaluation circuit which enables to synchronize with a correct coding rate when multiple coding rates exist in the input signal to a Viterbi decoder. A first coding rate setting unit sets a coding rate for which the metric value threshold may need to be identified, and a second coding rate setting unit sets a coding rate other than the coding rate set by the first coding rate setting unit. A metric value threshold setting unit decreases values gradually from the maximum metric value threshold as the synchronous/asynchronous state of the Viterbi decoder is monitored by a synchronous/asynchronous monitor in order to find the minimum metric value threshold where the Viterbi decoder is not completely synchronized limit for judging asynchronicity). This minimum value is determined as the metric value threshold for the coding rate set by the first coding rate setting unit.

    摘要翻译： 一种方法和装置确定在维特比同步评估电路中使用的度量值阈值，当维特比解码器的输入信号中存在多个编码率时，能够与正确的编码率同步。 第一编码率设定单元设定可能需要识别度量值阈值的编码率，第二编码率设定单元设定由第一编码率设定单元设定的编码率以外的编码率。 当维特比解码器的同步/异步状态由同步/异步监视器监视时，度量值阈值设置单元从最大度量值阈值逐渐减小值，以便找到维特比解码器不完全同步的最小度量值阈值 判断异步的极限）。 该最小值被确定为由第一编码率设置单元设置的编码率的度量值阈值。