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    • 55. 发明授权
    • Branch metric computation and noise predictive calibration/adaptation for over-sampled Y samples
    • 过采样Y样本的分支度量计算和噪声预测校准/适应
    • US08625217B1
    • 2014-01-07
    • US13628579
    • 2012-09-27
    • LSI Corporation
    • Shaohua YangXuebin Wu
    • G11B20/10H04B1/10
    • Techniques are disclosed for performing branch metric computations/noise predictive calibration/adaptation for over-sampled Y samples. In one or more embodiments, the techniques employ a data processing apparatus (circuit) that includes a parallel to serial convertor configured to receive a first stream of sample data (e.g., Y samples) and a second stream of sample data (e.g., Z samples). The parallel to serial convertor is operable to combine the first stream of sample data and the second stream of sample data into a combined stream of sample data (e.g., combined Y and Z samples). The data processing apparatus (circuit) further includes a filter (e.g., a noise predictive finite impulse response (NPFIR) filter, a noise whitening filter, such as a noise predictive calibration/adaptation module (NPCAL) filter, and so forth) that is configured to receive the combined stream of sample data and whiten noise in the combined stream of sample data.
    • 公开了用于执行用于过采样Y样本的分支度量计算/噪声预测校准/适应的技术。 在一个或多个实施例中,该技术采用数据处理装置(电路),其包括并行到串行转换器,其被配置为接收第一采样数据流(例如,Y采样)和第二采样数据流(例如,Z采样 )。 并行到串行转换器可操作以将第一采样数据流和第二采样数据流组合成采样数据的组合流(例如,组合的Y和Z采样)。 数据处理装置(电路)还包括滤波器(例如,噪声预测有限脉冲响应(NPFIR)滤波器),噪声白化滤波器(例如噪声预测校准/适配模块(NPCAL)滤波器等等)) 被配置为在合并的采样数据流中接收采样数据的组合流和增白噪声。
    • 56. 发明申请
    • PROGRAMMABLE QUASI-CYCLIC LOW-DENSITY PARITY CHECK (QC LDPC) ENCODER FOR READ CHANNEL
    • 可编程循环低密度奇偶校验(QC LDPC)编解码器
    • US20130091403A1
    • 2013-04-11
    • US13632768
    • 2012-10-01
    • LSI Corporation
    • Shaohua YangChangyou XuRichard RauschmayerHao ZhongWeijun Tan
    • H03M13/05
    • H03M13/05G06F11/1008H03M13/116H03M13/2792
    • The present invention is a programmable QC LDPC encoder for encoding user data. The encoder may be configurable for implementation with a read channel. The encoder may include a plurality of barrel shifter circuits. The barrel shifter circuits are configured for generating a plurality of parity bits based on interleaved user bits received by the encoder. The barrel shifter circuits are further configured for outputting the parity bits. The encoder may further include an encoder interleaver memory. The encoder interleaver memory may be communicatively coupled with the barrel shifter circuits and may receive the parity bits output from the barrel shifter circuits. The encoder interleaver may be configured for interleaving the parity bits. Further, the encoder may be configured for outputting the interleaved parity bits to a multiplexer. The barrel shifter circuits may generate the plurality of parity bits via an encoding algorithm: p=u*GT.
    • 本发明是用于编码用户数据的可编程QC LDPC编码器。 编码器可以被配置为用读通道实现。 编码器可以包括多个桶形移位器电路。 桶形移位器电路被配置为基于由编码器接收的交织的用户比特生成多个奇偶校验位。 桶形移位器电路还被配置为输出奇偶校验位。 编码器还可以包括编码器交织器存储器。 编码器交织器存储器可以与桶形移位器电路通信耦合,并且可以接收从桶形移位器电路输出的奇偶校验位。 编码器交织器可以被配置为交织奇偶校验位。 此外,编码器可以被配置为将交错的奇偶校验位输出到多路复用器。 桶形移位器电路可以通过编码算法生成多个奇偶校验位:p = u * GT。