Efficient digital upconverter
    1.
    发明授权
    Efficient digital upconverter 有权
    高效数字上变频器

    公开(公告)号:US08295388B1

    公开(公告)日:2012-10-23

    申请号:US12325936

    申请日:2008-12-01

    IPC分类号: H04L27/00

    CPC分类号: H04L27/365

    摘要: Techniques for efficient upconversion can process complex input data, such as for example data in an inphase and quadrature form. Half sample interpolation filtering and delay can be performed, and the results can be combined in a quarter-rate upconverter. The quarter rate upconversion can allow one of the half-sample interpolating filtering and the delay to be performed on one of either the inphase and quadrature samples.

    摘要翻译: 用于高效上转换的技术可以处理复杂的输入数据,例如以同相和正交形式的数据。 可以执行半采样插值滤波和延迟,结果可以在四分之一倍率上变频器中组合。 四分之一频率上变频可以允许在一个同相和正交采样中执行半采样内插滤波和延迟之一。

    Low-density parity check decoding using combined check node and variable node
    2.
    发明授权
    Low-density parity check decoding using combined check node and variable node 有权
    使用组合校验节点和变量节点的低密度奇偶校验解码

    公开(公告)号:US08266493B1

    公开(公告)日:2012-09-11

    申请号:US11971876

    申请日:2008-01-09

    摘要: A technique for decoding low-density parity check codes includes performing a combined check node and variable node calculation. Decoding is initialized using channel likelihood values estimated from a received physical signal. The decoding iteratively updates the variable nodes. Performing a combined check node and variable node calculation can enable reduced memory usage and faster convergence for the decoder.

    摘要翻译: 用于解码低密度奇偶校验码的技术包括执行组合校验节点和可变节点计算。 使用从接收到的物理信号估计的信道似然值来初始化解码。 解码迭代地更新变量节点。 执行组合校验节点和变量节点计算可以使解码器减少内存使用和更快的收敛。

    Encoder for low-density parity check codes
    3.
    发明授权
    Encoder for low-density parity check codes 有权
    用于低密度奇偶校验码的编码器

    公开(公告)号:US08095859B1

    公开(公告)日:2012-01-10

    申请号:US11971875

    申请日:2008-01-09

    IPC分类号: G06F11/00

    摘要: Encoding of a low-density parity check code uses a block-circulant encoding matrix built from circulant matrices. Encoding can include partitioning data into a plurality of data segments. The data segments are each circularly rotated. A plurality of XOR summations are formed for each rotation of the data segments to produce output symbols. The XOR summations use data from the data segments defined by the circulant matrices. Output symbols are produced in parallel for each rotation of the data segments.

    摘要翻译: 低密度奇偶校验码的编码使用由循环矩阵构建的块循环编码矩阵。 编码可以包括将数据分割成多个数据段。 数据段各自循环旋转。 为数据段的每次旋转形成多个XOR求和以产生输出符号。 XOR求和使用由循环矩阵定义的数据段的数据。 对于数据段的每次旋转,输出符号并行生成。

    Finite impulse response filter with parallel input
    4.
    发明授权
    Finite impulse response filter with parallel input 有权
    具有并行输入的有限脉冲响应滤波器

    公开(公告)号:US09098435B1

    公开(公告)日:2015-08-04

    申请号:US11540142

    申请日:2006-09-28

    IPC分类号: G06F17/14 G06F7/53

    摘要: A filter and method for finite impulse response filtering an input signal is described. In one embodiment, the filter includes an input circuit configured to receive input samples in parallel, where the parallel input samples correspond to sequential samples of the input signal. In another embodiment, the filter includes a coefficient memory configured to store filter response coefficients and output a subset of those coefficients corresponding to a selected decimation factor.

    摘要翻译: 描述了一种用于对输入信号进行有限脉冲响应滤波的滤波器和方法。 在一个实施例中,滤波器包括被配置为并行地接收输入采样的输入电路,其中并行输入样本对应于输入信号的顺序采样。 在另一个实施例中,滤波器包括被配置为存储滤波器响应系数并输出对应于所选抽取因子的那些系数的子集的系数存储器。

    Parallel infinite impulse response filter
    5.
    发明授权
    Parallel infinite impulse response filter 有权
    平行无限脉冲响应滤波器

    公开(公告)号:US08725785B1

    公开(公告)日:2014-05-13

    申请号:US12117555

    申请日:2008-05-08

    IPC分类号: G06F17/10

    摘要: A technique for performing parallel-input parallel-output infinite impulse response (IIR) filtering uses two parallel-input-parallel-output finite impulse response (FIR) filters. One FIR filter is used as a feed-forward filter and one FIR filter is used as a feed-back filter. The feed-back filter is coupled to delays and summers to allow the filter operations to be performed in parallel.

    摘要翻译: 一种执行并行输入并行输出无限脉冲响应(IIR)滤波的技术使用两个并行输入并行输出有限脉冲响应(FIR)滤波器。 一个FIR滤波器用作前馈滤波器,一个FIR滤波器用作反馈滤波器。 反馈滤波器耦合到延迟和加法器以允许并行执行滤波器操作。