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    • 1. 发明授权
    • Jitter sensitive maximum-a-posteriori sequence detection
    • 抖动敏感最大后验序列检测
    • US07424077B2
    • 2008-09-09
    • US11105008
    • 2005-04-13
    • Xueshi YangErozan Mehmet KurtasRohit NegiXun Zhang
    • Xueshi YangErozan Mehmet KurtasRohit NegiXun Zhang
    • H04L7/02
    • H04L25/03178G11B20/10046G11B20/10212
    • A channel detector has an anchor points inserter, a desired signal calculator, a distance calculator and a data detector. The anchor points inserter is adapted to choose values of expected transition locations for transition shifts within a received signal and to insert anchor points corresponding to the chosen values within a bit detection interval. The desired signal calculator is coupled to the anchor points inserter and is adapted to estimate desired signals corresponding to transition location information from the anchor points inserter. The distance calculator is coupled to the desired signal calculator and is adapted to generate a distance calculator output based on distances between the received signal and each of the desired signals. The data detector is coupled to the distance calculator and is adapted to identify a bit sequence corresponding to a desired signal having a minimum distance from the received signal. The data detector is adapted to generate an output based on the distance calculator output.
    • 信道检测器具有锚点插入器,期望的信号计算器,距离计算器和数据检测器。 锚点插入器适于选择接收信号内的转变位移的预期转换位置的值,并且在位检测间隔内插入与所选择的值对应的锚定点。 期望的信号计算器耦合到锚点插入器,并且适于估计对应于来自锚点插入器的转换位置信息的期望信号。 距离计算器耦合到期望的信号计算器,并且适于基于接收信号和每个期望信号之间的距离产生距离计算器输出。 数据检测器耦合到距离计算器,并且适于识别与从接收信号具有最小距离的期望信号相对应的比特序列。 数据检测器适于基于距离计算器输出生成输出。
    • 3. 发明授权
    • Method and apparatus for interative noise whitening with causal and anti-causal prediction filters
    • 用因果和反因果预测滤波器迭代噪声增白的方法和装置
    • US07561640B2
    • 2009-07-14
    • US11102622
    • 2005-04-08
    • Mustafa Nazmi KaynakErozan Mehmet Kurtas
    • Mustafa Nazmi KaynakErozan Mehmet Kurtas
    • H04L27/06
    • H04L25/03076H04L2025/03356H04L2025/03503H04L2025/03611
    • A channel detector includes a belief propagation detector that is coupled to a channel and adapted to receive a channel output and to generate tentative bit decisions based in part on the channel output. The channel detector further includes a causal and anti-causal channel output module coupled to the belief propagation detector and adapted to generate causal and anti-causal channel outputs based on the tentative bit decisions. The channel detector also includes a noise prediction module coupled to the causal and anti-causal channel output module and adapted to predict noise samples based on a difference between the channel output and the causal and anti-causal channel outputs. Further, the channel detector includes a noise prediction module adapted to whiten the channel output with the predicted noise samples and to return the whitened channel output to the belief propagation detector to generate new tentative bit decisions.
    • 信道检测器包括置信传播检测器,其被耦合到信道并且适于接收信道输出并且部分地基于信道输出产生临时位决定。 信道检测器还包括耦合到置信传播检测器的因果信道输出模块和反因果信道输出模块,其适于基于暂定比特决定产生因果信道和反因果信道输出。 信道检测器还包括耦合到因果信道和反因果信道输出模块的噪声预测模块,并且适于基于信道输出与因果信道和反因果信道输出之间的差异来预测噪声样本。 此外,信道检测器包括噪声预测模块,其适于使用预测的噪声样本对信道输出进行白化,并将白化的信道输出返回到置信传播检测器以产生新的暂定位决定。
    • 7. 发明授权
    • Method and apparatus for providing iterative timing recovery
    • 提供迭代定时恢复的方法和装置
    • US07602863B2
    • 2009-10-13
    • US10950312
    • 2004-09-24
    • Piya KovintavewatJohn Robert BarryMehmet Fatih ErdenErozan Mehmet Kurtas
    • Piya KovintavewatJohn Robert BarryMehmet Fatih ErdenErozan Mehmet Kurtas
    • H04L27/06
    • H04L25/03337H04L7/0054
    • A method includes the steps of receiving a signal indicative of data bits, and performing per survivor processing-iterative timing recovery (PSP-ITR) on the received signal to generate probabilities of the data bits. To perform PSP-ITR on the received signal, the signal can be processed using a per survivor processing-soft decision algorithm (PSP-SDA) which jointly performs timing recovery and equalization in accordance with embodiments of the present invention. The soft decision algorithm (SDA) can be, for example, a Bahl, Cocke, Jelinek, and Raviv (BCJR) algorithm or a Soft Output Viterbi Algorithm (SOVA) modified in accordance with the concepts of the present invention such that it is configured to implement per survivor processing (PSP) to jointly perform timing recovery and equalization.
    • 一种方法包括以下步骤:接收指示数据比特的信号,并对接收到的信号执行每个幸存者处理 - 迭代定时恢复(PSP-ITR),以产生数据比特的概率。 为了对接收的信号执行PSP-ITR,可以使用根据本发明的实施例的共同执行定时恢复和均衡的每个幸存者处理软判决算法(PSP-SDA)来处理信号。 软判决算法(SDA)可以是例如根据本发明的概念修改的Bahl,Cocke,Jelinek和Raviv(BCJR)算法或软输出维特比算法(SOVA),使得其被配置 实施每个幸存者处理(PSP)来共同执行定时恢复和均衡。