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Information rates for magnetic recording channels with peak- and slope-limited magnetization

机译:具有峰值和斜率限制的磁化强度的磁记录通道的信息速率

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摘要

A model for magnetic recording is proposed which uses two parameters to describe the limitations on the remanent magnetization in the medium: the dimensionless peak value A/sub m/ and the steepest slope B(s/sup -1/). A low-pass bandwidth restriction W(s/sup -1/) due to read circuits is also included. Lower and upper bounds on the achievable transmission rates are derived in terms of the signal-to-noise ratio. For the case of ideal low-pass restriction with BW, the bounds increase linearly, logarithmically, and as the cube root, with low, medium, and large rho /sub B/, respectively. With BW the problem reduces to the one with no restriction on the slope.
机译:提出了一种磁记录模型,该模型使用两个参数来描述介质中剩余磁化强度的限制:无量纲峰值A / sub m /和最陡斜率B(s / sup -1 /)。还包括由于读取电路引起的低通带宽限制W(s / sup -1 /)。根据信噪比得出可达到的传输速率的上限和下限。对于具有B W的理想低通限制的情况,边界分别以低,中和大rho / sub B /线性,对数地和作为立方根增加。使用B W,问题将减少到对坡度没有限制的问题。

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