In this study, we perform an analytical investigation of the electro-optic (EO), Mach-Zehnder modulator (MZM) transmission boundary area with a nonlinear model. We propose model that represents allowable RF input amplitude within MZM area. investigate maximum and confine its harmonics using theory, RoF simulation, characteristic experiments. The in is convenient technique can without optical am...

In this paper, we present a real and simulated study of frequency up mixing employing an electro-optical sampling semiconductor optical amplifier Mach–Zehnder interferometer (SOA–MZI) along with the differential modulation schema. The signal is generated by pulse clock (OPC) at fs= 19.5 GHz. quadratic phase shift keying (QPSK) intermediate (IF) fIF shifted to high frequencies nfs ± SOA–MZI outp...

We demonstrate the transmission of 6.4 Tbit/s OCDM/WDM (4 OCDM x 40 WDM x 40 Gbit/s) using only C-band wavelength region. A record of 1.6 bit/s/Hz spectrum efficiency is achieved by QPSK optical encoding/ decoding along with optical time-gating and optical thresholding in addition to polarization multiplexing. Introduction To meet the rapid increase of the demand for multi-terabit/s transmissio...

The demand for more broadband services such as video on demand, social networking, cloud/grid computing...is expected to grow up. To support and provide these services to the users, the capacity in access network must increase, driving thus data rate increase in metro/core transport network. In the past, the demand for more capacity in WDM long-haul transport network has been enabled by increas...

Multiple-input multiple-output (MIMO) radar is a relatively new concept in the field of radar signal processing. Many novel MIMO radar waveforms have been developed by considering various performance metrics and constraints. In this paper, we show that finite alphabet constant-envelope (FACE) quadrature-pulse shift keying (QPSK) waveforms can be designed to realize a given covariance matrix by ...

A new algorithm for a group iterative linear Zero-Forcing (ZF) receiver for multiple-input multiple-output (MIMO) systems is proposed in this paper. The proposed algorithm merges between the group linear ZF receiver and V-Blast algorithms, where the signals in every group are detected by linear ZF method and then successive interference cancellation detection is applied between the different gr...

To deliver multimedia content application over the cellular networks, high data rate modulation scheme is one of the important criteria besides good error coding. However, the implementation of high data rate modulation techniques that have good bandwidth efficiency in W-CDMA cellular communication requires perfect modulators, demodulators, filter and transmission path that are difficult to ach...

We present a study of the influence of dispersion induced phase noise for CO-OFDM systems using FFT multiplexing/IFFT demultiplexing techniques (software based). The software based system provides a method for a rigorous evaluation of the phase noise variance caused by Common Phase Error (CPE) and Inter-Carrier Interference (ICI) including – for the first time to our knowledge – in explicit for...

The balanced modulator, which comprises two amplitude-modulation modules, is widely used in phase-modulated communication systems. In practice, the balance between these amplitude-modulation modules is difficult to maintain, and the amplitude and phase imbalances can cause distortion in the signal constellation and introduce undesired interfering tone signal components when such an imperfect mo...

Flex-grid optical networks have evolved as a near-future deployment option to facilitate dynamic and bandwidth intense traffic demands. These networks enable capacity gains by operating on a flexible spectrum, allocating minimum required bandwidth, for a given channel configuration. It is thus important to understand the nonlinear dynamics of various high bit-rate super-channel configurations, ...