Title :
Signal processing and coding for two-dimensional optical storage
Author :
Immink, A.H.J. ; Coene, W.M.J. ; van der Lee, A.M. ; Busch, C. ; Hekstra, A.P. ; Bergmans, J.W.M. ; Riani, J. ; Beneden, S.J.L.V. ; Conway, T.
Author_Institution :
Philips Res. Labs., Eindhoven, Netherlands
Abstract :
The paper introduces the concept of two-dimensional optical storage (TwoDOS). In this concept, bits are written in a broad spiral consisting of a number of bit-rows stacked together in a hexagonal packing. Bits with a value ´1´ are represented physically as circular pit-holes on the disc, while bits with a value ´0´ are characterized by the absence of such a pit-hole. A scalar diffraction model is used to calculate the signal levels for various diameters of the pits. A stripe-wise Viterbi detector is proposed to perform 2D bit-detection with a limited state complexity of the trellis. Simulation results are shown for various diameters of the pits. A 2D modulation code is applied to eliminate patterns that yield a high probability of erroneous detection.
Keywords :
Viterbi detection; computational complexity; encoding; light diffraction; optical disc storage; optical transfer function; signal processing; 2D bit-detection; 2D modulation code; circular pit-holes; coding; erroneous detection probability; hexagonal packing; modulation transfer function; scalar diffraction model; signal processing; stacked bit-rows; stripe-wise Viterbi detector; two-dimensional optical storage; Apertures; Diffraction; Frequency; Laboratories; Optical computing; Optical modulation; Optical recording; Optical signal processing; Spirals; Transfer functions;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258962
