Performance comparison of equalization/detection schemes for magnification error-dominated volume holographic storage channel
Keskinöz, Mehmet and Vijaya Kumar, B. V. K. (2004) Performance comparison of equalization/detection schemes for magnification error-dominated volume holographic storage channel. In: Optical Data Storage 2004, Monterey, California, USA
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Official URL: http://dx.doi.org/10.1117/12.555754
Data pages retrieved from a volume holographic storage channel (VHSC) suffer from inter-symbol interference (ISI) and noise. Assuming ISI does not change spatially (i.e., stationary), 2-D equalization/detection schemes has been previously developed for quadratic channels like VHSC. In practice, however, the point spread function of a VHSC changes spatially due to magnification and misalignment errors. In this paper, we develop a channel model for magnification error (ME) dominated VHSC and also evaluate the effect of ME on the equalization/detection performance. Results indicate that the recently introduced iterative magnitude-squared decision feedback equalization (IMSDFE) method is more robust to magnification error compared to linear minimum mean squared-error (LMMSE) equalization and adaptive threshold detection (ATD).
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