We have studied single and multiple channel equalization techniques for improving detection performance at high track densities. A multichannel matched filter approach is used to bound the performance gain that can be expected from an equalizer specifically designed to reduce intertrack interference. Side reading of the head is simulated at various off-track head positions using the reciprocity integral. Significant performance improvements are predicted for a three element head detecting data on the center track. Up to a 2 dB improvement in SNR is predicted for the three element scheme while the head is on-track, and up to a 5 dB improvement as the head moves off-track.
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