Geoffrey W. Burr, Pierre Tchoulfian, et al.
Journal of Applied Physics
We discuss experimental results of a versatile nonbinary modulation and channel code appropriate for two-dimensional page-oriented holographic memories. An enumerative permutation code is used to provide a modulation code that permits a simple maximum-likelihood detection scheme. Experimental results from the IBM Demon testbed are used to characterize the performance and feasibility of the proposed modulation and channel codes. A reverse coding technique is introduced to combat the effects of error propagation on the modulation-code performance. We find experimentally that level-3 pixels achieve the best practical results, offering an 11–35% improvement in capacity and a 12% increase in readout rate as compared with local binary thresholding techniques. © 2003 Optical Society of America.
Geoffrey W. Burr, Pierre Tchoulfian, et al.
Journal of Applied Physics
Daniel Krebs, Simone Raoux, et al.
Applied Physics Letters
Victor Chan, A. Gasasira, et al.
IEEE Trans Semicond Manuf
K. Moon, Alessandro Fumarola, et al.
IEEE J-EDS