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1.
Opt Express ; 21(22): 25954-67, 2013 Nov 04.
Article in English | MEDLINE | ID: mdl-24216821

ABSTRACT

In this paper, an iterative parallel interference cancellation (Iter-PIC) technique is developed for optical code-division multiple-access (OCDMA) systems relying on shot-noise limited Poisson photon-counting reception. The novel semi-analytical tool of extrinsic information transfer (EXIT) charts is used for analysing both the bit error rate (BER) performance as well as the channel capacity of these systems and the results are verified by Monte Carlo simulations. The proposed Iter-PIC OCDMA system is capable of achieving two orders of magnitude BER improvements and a 0.1 nats of capacity improvement over the conventional chip-level OCDMA systems at a coding rate of 1/10.

2.
Opt Express ; 20(24): 26379-93, 2012 Nov 19.
Article in English | MEDLINE | ID: mdl-23187493

ABSTRACT

A novel Photon-Counting Spatial-Diversity-and-Multiplexing (PC-SDM) scheme is proposed for high-speed Free-Space Optical (FSO) transmission over shot-noise limited Poisson channels experiencing turbulence-induced fading. In particular, Iterative Parallel Interference Cancellation (Iter-PIC) aided Q-ary Pulse Position Modulation (Q-PPM) is employed. Simulation results demonstrate that our proposed scheme exhibits a high integrity and a high throughput, while mitigating the effects of multi-stream interference and background radiation noise.


Subject(s)
Atmosphere/analysis , Computer Simulation , Light , Photons , Scattering, Radiation , Telecommunications/instrumentation , Equipment Design , Humans , Signal Processing, Computer-Assisted
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