Maryam Niknamfar

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In order to generate optical millimeter wave signals, two cascaded Mach-Zehnder modulators (MZMs) are utilized. The first MZM modulates electric signals in the form of single side-band. Optical single side-band (OSSB) approach is a method to overcome the fiber chromatic dispersion effect for long distance communications. Two OSSB channels' frequencies are(More)
Different parameters that can be adjusted to obtain an acceptable performance for a Dense Wavelength Division Multiplexing (DWDM) network are considered. A comparison of various parameter settings between the external and direct optical modulation is made based on the simulation results. Different effects caused by varying the electrical power, while(More)
This paper presents a method of adding a second dimension of optical encoding, as an out-of-band label, to be used for routing data through a label-switched network. Combining wavelength and code multiplexing techniques generates an optical circuit-switched network that can handle a data capacity of up to several Tb/s on each point-to-point link in the(More)
Two cascaded Mach-Zehnder modulators (MZMs) are utilized to generate optical single-side band millimeter wave signals. This modulation scheme is tolerant to fiber chromatic dispersion effect for long distance communication. Since, electrical voltage setting is critical to control the unwanted harmonics' power, harmonic distortions analysis is necessary for(More)
A real-time monitoring solution is presented for detection of faulty status in industrial processes which uses the input-output data features to set monitoring boundaries. The proposed solution uses independent components analysis (ICA) in order to extract features of data samples measured from the actual plant. The features extracted from the simulated(More)
Different optical modulation schemes are studied to overcome the fiber dispersion effect for transmitting radio frequency (RF) modulated signals. Novel optical single side band (OSSB) schemes are proposed and simulated. The required RF power is investigated for the schemes for different lengths of the fiber. Simulation results of suggested OSSB structures(More)
In this paper, an improvement to the decision-directed early-late (lambda=1) symbol timing error detector is presented. The source of self-noise is determined and canceled. Substantial improvement in the resulting additive white Gaussian noise (AWGN) performance with respect to the Cramer-Rao bound has been achieved
A radio over fiber (RoF) communication system is considered for cable television (CATV) channels over wavelength division multiplexing (WDM) network using an optical direct modulator (DM). Since the DM bandwidth is limited, increasing bandwidth efficiency of the system using M-ary quadrature amplitude modulation (MQAM) schemes will improve the link symbol(More)
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