Ziad A. El-Sahn

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We experimentally demonstrate the performance of a 10 Gb/s subcarrier multiplexed (SCM) wavelength-division multiplexed (WDM) passive optical network (PON) using 2.5 Gbaud 16-QAM transmission signals. Digital signal processing (DSP) and square-root raised cosine (SRRC) pulse shaping enable both the uplink and downlink channels to achieve net spectral(More)
—Coherent optical interleave-division multiple-access (OIDMA) has been recently proposed for next generation passive optical network (NG-PON) systems. In this paper we present a performance evaluation and comparison of coherent OIDMA and coherent optical code-division multiple-access (OCDMA) PONs in terms of ONU launch power, PON reach, bit error rate(More)
—An innovative overlapped-subcarrier multiplexing (O-SCM) technique is proposed for single-feeder wavelength-division multiplexed (WDM) passive optical networks (PONs). Allowing a certain amount of spectral overlap between the uplink and the downlink maximizes the spectrum usage of bandwidth-limited reflective semiconductor optical amplifier (RSOA)-based(More)
We experimentally investigate the performance of a low-complexity non-iterative phase noise induced inter-carrier interference (ICI) compensation algorithm in reduced-guard-interval dual-polarization coherent-optical orthogonal-frequency-division-multiplexing (RGI-DP-CO-OFDM) transport systems. This interpolation-based ICI compensator estimates the(More)
  • Ziad A El-Sahn, Yousef M Abdelmalek, Hossam M H Shalaby, El-Sayed A El-Badawy
  • 2008
—A queuing subsystem is proposed to the round robin receiver/transmitter (R 3 T) optical code-division multiple-access (OCDMA) protocol. The corresponding state diagram and its mathematical model are outlined. We prove that significant improvement in terms of system throughput and blocking probability can be achieved by only adding a single buffer at each(More)
  • Yousef M Abdelmalek, Ziad A El-Sahn, M H Hossam, Shalaby, El-Sayed Abdel-Moety El-Badawy
  • 2007
A random access protocol that adopts stop-and-wait automatic repeat request ͑ARQ͒ is proposed for optical code-division multiple-access ͑CDMA͒ communication systems. A detailed state diagram and a mathematical model based on the equilibrium point analysis ͑EPA͒ technique are presented. Several performance measures are evaluated under different network(More)
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