Iterative readback-aided detection for holographic data storage systems

Abstract

Retrieving original user data from holographic data storage systems is mainly affected by two-dimensional (2D) intersymbol interference; the minimisation of this interference not only improves the system performance, but it also increases the storage density for page-oriented storage systems. An iterative detection that is supported by the read-back signal is proposed. The decoded symbols are passed through a 2D partial response target before they are combined with the output of the equaliser, leading to the generation of a refined information source that improves the channel-detection performance. The simulation results show that the proposed structure provides a gain of similar to 1-2 dB; furthermore, the combinative quality of the proposed model and a page-based search scheme were analysed as well.