Title :
Iterative Soft-Input Soft-Output MMSE Equalization for Two-Dimensional Coherent Optical Memory
Author :
Keskinoz, Mehmet
Author_Institution :
Sabanci Univ., Istanbul
Abstract :
As the capacity of the two-dimensional coherent optical memory (2D-COM) increases, the bit error rate (BER) performance of the system is degraded due to increased two- dimensional inter-symbol interference (2D-ISI) and noise. To improve the system performance under these adverse effects and to increase the capacity, in this paper, we devise an iterative soft- input soft-output equalization method which is optimized in minimum mean square error (MMSE) sense called iterative soft- MMSE (ISISO-MMSE) equalization by considering the nonlinearity inherent in the channel. We evaluate the performance of ISISO-MMSE by using numerical experiments under different amount of 2D-ISI and optical noise. Simulation results suggest that ISMME is a good candidate for ultra-high capacity 2D-COM.
Keywords :
equalisers; intersymbol interference; iterative methods; least mean squares methods; optical noise; optical storage; bit error rate; iterative soft-input soft-output MMSE equalization; minimum mean square error; optical noise; two-dimensional coherent optical memory; two-dimensional inter-symbol interference; Bit error rate; Holographic optical components; Holography; Material storage; Nonlinear optics; Optical arrays; Optical modulation; Optical noise; Optical recording; Optical sensors;
Conference_Titel :
Communications, 2007. ICC '07. IEEE International Conference on
Conference_Location :
Glasgow
Print_ISBN :
1-4244-0353-7
DOI :
10.1109/ICC.2007.1034