Signal generation model for high density magnetic recording

When designing magnetic recording detectors, we want them to be tuned to the signal and noise characteristics of readback waveforms. Interest has arisen in creating realistic readback waveforms via computer simulation since this provides the designer with flexibility of quickly changing the recording parameters. We present an efficient, stable and realistic zig-zag media transition model as a faster alternative to micromagnetic modeling. Our zig-zag model offers four orders of magnitude of computational savings over micromagnetic modeling. Due to this low computational complexity, it is well suited for applications in signal processing, where a large number of transitions needs to be created. We show how to set the parameters of the model to describe high density recording phenomena. We also present a readback strategy for obtaining the readback signal. A simulation example shows the applicability of the model.