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    • 2. 发明申请
    • MEMORY EFFICIENT LDPC DECODING METHODS AND APPARATUS
    • 存储有效的LDPC解码方法和设备
    • WO2006017555A2
    • 2006-02-16
    • PCT/US2005/027526
    • 2005-08-01
    • FLARION TECHNOLOGIES, INC.RICHARDSON, TomNOVICHKOV, Vladimir
    • RICHARDSON, TomNOVICHKOV, Vladimir
    • H03M13/00
    • H03M13/6362H03M13/1105H03M13/1111H03M13/1114H03M13/1117H03M13/1122H03M13/1137
    • Methods and apparatus for implementing memory efficient LDPC decodes are described. In accordance with the invention message information is stored in a compressed state for check node processing operations. The state for a check node is fully updated and then subject to an extraction process to generate check node to variable node messages. The signs of messages received from variable nodes may be stored by the check node processor module of the invention for use in message extraction. The check node processor can process messages in variable node order thereby allowing the variable node processor and check node processor to operate on messages in the same order reducing or eliminating the need to buffer and/or reorder messages passed between check nodes and variable nodes. Graph structures which allow check node processing on one graph iteration to proceed before the previous graph iteration has been completed are also described.
    • 描述了实现存储器高效LDPC解码的方法和装置。 根据本发明,消息信息以压缩状态存储以进行校验节点处理操作。 检查节点的状态被完全更新,然后进行提取处理,以生成可变节点消息的校验节点。 从可变节点接收的消息的符号可以由本发明的校验节点处理器模块存储以用于消息提取。 校验节点处理器可以以可变节点顺序处理消息,从而允许变量节点处理器和校验节点处理器以相同的顺序对消息进行操作,以减少或消除在校验节点和可变节点之间传递的消息的缓冲和/或重新排序的需要。 还描述了允许在先前的图形迭代完成之前在一个图形迭代上进行校验节点处理的图形结构。
    • 8. 发明申请
    • METHOD AND DEVICE FOR DECODING LDPC CODES AND COMMUNICATION APPARATUS INCLUDING SUCH DEVICE
    • 用于解码LDPC码的方法和设备以及包括这种设备的通信设备
    • WO2008071884A2
    • 2008-06-19
    • PCT/FR2007001963
    • 2007-11-29
    • COMMISSARIAT ENERGIE ATOMIQUESAVIN VALENTIN
    • SAVIN VALENTIN
    • H03M13/11
    • H03M13/1171H03M13/1117H03M13/112H03M13/1122H03M13/3723H03M13/3916H03M13/6583
    • The invention relates to a device for the iterative decoding of a received word represented by signal values according to a parity control matrix code of the type for passing messages between variable nodes and control nodes of a two-part graph related to said matrix, wherein said method includes at least the following steps: setting up at least one message of a variable node, according to said values, by an information representative of the ratio between the probability of having the most likely symbol at a position corresponding to the variable node and the probability of having the current symbol at said position; determining at least one message, relating to a determined symbol, of a control node to a determined variable node, as the selected minimal value, among the symbol sequences corresponding to the control node equation using said determined symbol at the determined variable node, by the maximal value of the messages received at the control node from variable nodes different from the determined variable node and each relating to the symbol associated with said different variable node in the sequence corresponding to the equation; and determining the messages of a variable node to a control node that relate to the whole set of symbols so that the minimal value of said messages is equal to zero.
    • 本发明涉及一种用于根据用于在可变节点和与所述矩阵相关的两部分图形的控制节点之间传递消息的类型的奇偶控制矩阵码对由信号值表示的接收字进行迭代解码的装置,其中所述 方法至少包括以下步骤:根据所述值,通过表示在与可变节点相对应的位置具有最可能的符号的概率与所述可变节点之间的比率的信息来设置变量节点的至少一个消息 在所述位置具有当前符号的概率; 在使用所确定的变量节点处的所述确定的符号的与控制节点等式对应的符号序列中,将与所确定的变量节点的控制节点有关的至少一个消息与所确定的变量节点确定为所选择的最小值, 来自与所确定的变量节点不同的变量节点在控制节点处接收的消息的最大值,并且每个与在与等式对应的序列中与所述不同变量节点相关联的符号相关; 以及将变量节点的消息确定到与整个符号集合相关的控制节点,使得所述消息的最小值等于零。
    • 9. 发明申请
    • APPARATUS AND METHOD FOR UPDATING CHECK NODE OF LOW-DENSITY PARITY CHECK CODES
    • 检查低密度奇偶校验码代码的装置和方法
    • WO2008069567A1
    • 2008-06-12
    • PCT/KR2007/006277
    • 2007-12-05
    • ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEOH, Jong-EeLEE, Yu-RoYOON, ChanhoCHEONG, MinhoLEE, Sok-KyuSONG, Yoo-SeungKIM, Younggyun
    • OH, Jong-EeLEE, Yu-RoYOON, ChanhoCHEONG, MinhoLEE, Sok-KyuSONG, Yoo-SeungKIM, Younggyun
    • H03M13/11
    • H03M13/1122H03M13/1117H03M13/112H03M13/6583
    • An apparatus and method for updating a check node of a low-density parity check (LDPC) code in order to decode the LDPC code are provided. The method includes the operations of: (a) obtaining a first bit of a first minimum value among input values, the number of input values being equal to the number of degrees of the check node, by performing an AND operation on first bits of the input values, the first bits being most significant bits of the input values; (b) obtaining result values by switching and sequentially performing an XOR operation and an OR operation on the first bit of the first minimum value and each of the first bits of the input values; and (c) performing operations (a) and (b) on the result values set as input values and performing operations (a) and (b) a number of times corresponding to the number of bits of each input value, that is, repeating until last bits are set as input values, to thereby obtain the first minimum value, the last bits being least significant bits of the input values. Accordingly, the complexity of hardware is reduced, and super high-speed processing is possible.
    • 提供了一种用于更新低密度奇偶校验(LDPC)码的校验节点以便解码LDPC码的装置和方法。 该方法包括以下操作:(a)通过对所述校验节点的第一比特执行“与”运算,获得输入值中的第一最小值的第一比特,输入值的数目等于校验节点的度数。 输入值,第一位是输入值的最高有效位; (b)通过对所述第一最小值的所述第一位和所述输入值的所述第一位中的每一个进行切换和顺序执行异或运算和或运算来获得结果值; 和(c)对设置为输入值的结果值执行操作(a)和(b),并且执行操作(a)和(b)与每个输入值的位数相对应的次数,即重复 直到最后的位被设置为输入值为止,从而获得第一最小值,最后的位是输入值的最低有效位。 因此,硬件的复杂度降低,超高速处理成为可能。