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    • 12. 发明授权
    • Pipeline architecture for maximum a posteriori (MAP) decoders
    • 最大后验(MAP)解码器的管道架构
    • US07908545B2
    • 2011-03-15
    • US11653014
    • 2007-01-12
    • Edward HeplerMichael F. Starsinic
    • Edward HeplerMichael F. Starsinic
    • H03M13/03
    • H03M13/3905H03M13/3972H03M13/6505
    • The sliding window approach to pipeline maximum a posteriori (MAP) decoder architecture is modified to decrease processing time. Once the forward metrics have been calculated for the first sliding window of the decoder, the reverse metrics for each window are calculated while the forward metrics for the next window are calculated. As each new forward metric is calculated and stored into memory, the forward metric from the previous window is read from memory for use with reverse metric being calculated in calculating extrinsic value. Each forward metric for use in calculating an extrinsic value is written to the same memory location. The calculations can be reversed, reverse metrics being calculated first, followed by reverse metric calculations. Although this architecture as developed for a turbo decoder, all convolution codes can use the MAP algorithm of the present invention.
    • 流水线最大后验(MAP)解码器架构的滑动窗口方法被修改以减少处理时间。 一旦为解码器的第一滑动窗口计算了前向量度,则在计算下一窗口的前向量度时,计算每个窗口的反向度量。 当每个新的前向度量被计算并存储到存储器中时,从存储器中读取来自前一窗口的前向度量用于在计算外在值时计算的反向度量。 用于计算外在值的每个前向量度被写入同一个存储单元。 计算可以反转,首先计算反向度量,然后是反向度量计算。 虽然为turbo解码器开发的这种架构,但是所有的卷积码都可以使用本发明的MAP算法。
    • 13. 发明申请
    • SYMBOL RATE HARDWARE ACCELERATOR
    • 符号速率硬件加速器
    • US20080016287A1
    • 2008-01-17
    • US11776610
    • 2007-07-12
    • Edward Hepler
    • Edward Hepler
    • G06F12/02G06F11/10
    • H04L1/0043H04L1/0065H04L1/0071
    • A hardware accelerator includes a first buffer, a second buffer, address generator(s), a translation read-only memory (ROM), a cyclic redundancy check (CRC) generator, a convolutional encoder and a controller. The first and second buffers store information bits. The address generator(s) generate(s) an address for accessing the first buffer, the second buffer and a shared memory architecture (SMA). The translation ROM is used in generating a translated address for accessing the first buffer and the second buffer. The controller sets parameters for the CRC generator, the convolutional encoder and the address generator, and performs a predefined sequence of control commands for channel processing, such as reordering, block coding, parity tailing, puncturing, convolutional encoding, and interleaving, on the information bits by manipulating the information bits while moving the information bits among the first buffer, the second buffer, the SMA, the CRC generator, and the convolutional encoder.
    • 硬件加速器包括第一缓冲器,第二缓冲器,地址生成器,转换只读存储器(ROM),循环冗余校验(CRC)发生器,卷积编码器和控制器。 第一和第二缓冲器存储信息位。 地址生成器生成用于访问第一缓冲器,第二缓冲器和共享存储器体系结构(SMA)的地址。 翻译ROM用于生成用于访问第一缓冲器和第二缓冲器的翻译地址。 控制器设置CRC发生器,卷积编码器和地址生成器的参数,并且对信息执行诸如重新排序,块编码,奇偶校验拖尾,删截,卷积编码和交织等信道处理的预定义的控制命令序列 在第一缓冲器,第二缓冲器,SMA,CRC发生器和卷积编码器中移动信息位的同时操纵信息位。