This paper proposes a Multi-Code Multi-Carrier CDMA, best suited for multi-rate services using multicode schemes and multi-carrier services used for high rate transmission as required for the Universal Telecommunication Mobile Systems (UMTS) Long Term Evolution (LTE). The system performance has been analyzed and evaluated by means of signal-to-noise plus interference ratio and bit error rate un...

We present a multiuser synchronization scheme for tracking the mobile’s uplink time and frequency offsets. It uses the redundancy introduced by the cyclic prefix and does not need additional pilots. We show performance results of an orthogonal frequency division multiplexing (OFDM)-based radio interface based on universal mobile telecommunication system (UMTS) parameters. For a UMTS-typical mob...

We theoretically study channel plasmon-polaritons (CPPs) with a geometry similar to that in recent experiments at telecommunication wavelengths [Bozhevolnyi et al., Nature 440, 508 (2006)]. The CPP modal shape, dispersion relation, and losses are simulated by using the multiple multipole method and the finite difference time domain technique. It is shown that, with an increase of the wavelength...

We implement a Synchronous Dataflow (SDF) model for the discretized data transmission in Very High-Speed Digital Subscriber Line (VDSL) using Agilent Advanced Design System (ADS) electronic design automation software. Our ADS implementation will enable designers to simulate and optimize different VDSL transceiver designs. The filters used at the VDSL receiver and the bit allocations for sub-cha...

We report on realization of channel plasmon-polariton (CPP) propagation along a subwavelength metal groove. Using imaging with a near-field microscope and end-fire coupling with a tapered fiber connected to a tunable laser at telecommunication wavelengths (1425-1620 nm), we demonstrate low-loss (propagation length approximately 100 microm) and well-confined (mode width approximately 1.1 microm)...

In the present paper, optical add drop multiplexers (OADMs) for Ultra Wide Wavelength division multiplexing (UW-WDM) in optical telecommunication ring networks have been modeled and parametrically investigated over wide range of the affecting parameters. Moreover, we have analyzed the flexible configuration changes as well as higher capacity and maximum possible transmission bit rates. Also in ...

The aim of this paper is to find out and check critical factors, which have a great impact over IPTV Customer Satisfaction. The research studied factors like Quality of Services, Channel Zapping Time and Repairing Packet Loss in network for Customer Satisfaction. The research is based upon primary data, which was collected through a questionnaire from the respondents of IPTV customers. The corr...

WDM networks play a significant role in telecommunication systems to face the demand for wider bandwidths. Technological growth and the emergence of new advents in WDM technologies require wavelengthrouted channel, which will implement high bit rate applications in the network transport layer. Several researches were carried out and possible technologies were implemented to improve the performa...

Emerging telecommunication technologies like 5G, green communications, and massive MIMO contribute to the use of directional antennas and beamforming. For this reason, modern propagation models should consider directional antennas with different beam widths, gains and radiation pattern directions. Most of the available propagation models are based on omnidirectional or isotropic antennas. A pro...

This paper described improvements to the abstract interprocess communication features added to VHDL as part of the SUAVE language design. Channel type declarations are extended to allow specification of bounded message buffers. This allows the designer to choose between asynchronous or synchronous message passing semantics. The latter makes models more amenable to formal verification based on s...