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METHOD AND APPARATUS FOR REDUCING THE CONTRIBUTION OF NOISE TO DIGITALLY SAMPLED SIGNALS

机译:减少噪声对数字采样信号的贡献的方法和装置

摘要

A method and apparatus for reducing the contribution of noise to digitally sampled signals includes a statistical processor and a slope limiter. The statistical processor determines an average value (mean and/or standard deviation) of the filtered signal which is used to determine a slope limit corresponding to an expected maximum first derivative value of a target signal frequency. This slope limit is applied to constrain the output of an analog to digital converter, to prevent the output of the analog to digital converter from exceeding this maximum rate of rise or fall. By constraining the output of the analog to digital converter, it is possible to digitally sample analog signals without first utilizing an anti-aliasing filter, since the post processing of the digitally sampled signals limits the contribution of the higher frequency components of the signal to thereby enable a fully digital sampling and filtering circuit to be provided for receiving signals.
机译:用于减少噪声对数字采样信号的影响的方法和装置包括统计处理器和斜率限制器。统计处理器确定滤波信号的平均值(均值和/或标准偏差),该平均值用于确定与目标信号频率的预期最大一阶导数值对应的斜率极限。应用此斜率限制来限制模数转换器的输出,以防止模数转换器的输出超过此最大上升或下降速率。通过限制模数转换器的输出,可以在不首先使用抗混叠滤波器的情况下对模拟信号进行数字采样,因为对数字采样信号的后处理限制了信号的较高频率分量的贡献。能够提供全数字采样和滤波电路以接收信号。

著录项

  • 公开/公告号EP2545653A4

    专利类型

  • 公开/公告日2014-04-02

    原文格式PDF

  • 申请/专利权人 ROCKSTAR BIDCO LP;

    申请/专利号EP20110752766

  • 发明设计人 DAVEY JONATHAN;JONES RUSSELL;

    申请日2011-02-25

  • 分类号H04B1/10;H03M1/12;

  • 国家 EP

  • 入库时间 2022-08-21 15:49:02

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