We discuss the influence of random-and periodic impulse noise on narrowband (< 500 kHz frequency band) Power Line Communications. We start with random impulse noise and compare the properties of the measured impulse noise with the common theoretical models like Middleton Class-A and Mixed Gaussian. The main difference is the fact that the measured impulse noise is noise with memory for the narr...

In order to improve the cycling performance of LiMn2O4, the spinel phase LiMn2–xBaxO4 (x = 0.01, 0.02 and 0.05) compounds were fabricated by the glycine-nitrate method. The structures of the products were investigated by X-ray diffraction. Electrochemical studies were carried out using the Li|LiMn2O4 and Li|LiMn2–xBaxO4 cells. The capacity loss of Li|LiMn2O4 cell is about 15% after 30 cycles, w...

Pyrrole was polymerized onto commercial SFG10 graphite by in situ polymerization technique. Polymerization decreases the initial irreversible capacity loss of the graphite anode. The decrease in the irreversible capacity loss is due to the reduction in the thickness of the solid electrolyte interface (SEI) layer formed. PPy/C (7.8%) gives the optimum performance based on the irreversible capaci...

The North American freight railroad network is projected to experience rising transportation demand in the coming decades, leading to increased congestion on many rail lines. Capacity is further strained by increased interest in increasing the speed and frequency of passenger service on shared rail corridors. Since passenger trains in North America predominantly operate on corridors where freig...

Mechanisms that are involved in the loss of capacity upon the cycling of electrochemical cells are discussed. The inherent instability of the electrochemical interface and the resultant geometrical changes are characteristic of electrodes in which the reactant is a pure element. On the other hand, decrepitation can play an important role in the case of polyphase electrodes in which significant ...

A Call Admission Control (CAC) scheme for downlink multimedia service in WCDMA system is proposed in this paper. The admission control based on instantaneous measurements may cause capacity loss and degrade in Quality of Service (QoS) because of abrupt uctuation of the power level at Base Station (BS). Both the average power level of real-time circuit services and average queue size of non-real...

The tremendous growth of wireless networks requires an efficient use of the scarce radio spectrum allocated to wireless communications. However, the main difficulty against an efficient use of radio spectrum is given by interferences, caused by unconstrained simultaneous transmissions, which result in damaged communications that need to be retransmitted leading to a higher cost of the service. ...

Over the past few years multidimensional self-consistent plasma simulations including complex chemistry have been developed which are promising tools for furthering our understanding of reactive gas plasmas and for reactor design and optimization. These simulations must be benchmarked against experimental data obtained in well-characterized systems such as the Gaseous Electronics Conference (GE...

For a generalization of Costa’s writing on dirty paper with irregular additive noise distribution, we show that the loss between the zerointerference capacity and the causal side information capacity can be arbitrarily large. This contrasts to the Gaussian noise case, where the capacity loss is zero or at most 1/4 bit for the non-causal and causal side information cases, respectively. This also...

In this paper, we have presented a novel approach of diversity antenna with high isolation which improves the channel capacity in wireless communication application. We have proposed diversity antenna which consists of two billhook shaped patch elements along with rectangular slot inserted in it and a narrow semi-circular shape on the ground plane. Ultra-wideband (UWB) diversity antenna element...