Wireless networks have biggest constraint of limited bandwidth in comparison to wired networks but in spite of this constraint wireless networks are becoming popular day by day on account of their flexibility, mobility as well as inexpensive physical medium (air). This paper aims to simulate wireless local area network. The performance of the network is evaluated using optimized network enginee...

Decision support systems (DSSs) are prevalent information systems for decision making in many competitive business environments. In a DSS, decision making process is intimately related to some factors which determine the quality of information systems and their related products. Traditional approaches to data analysis usually cannot be implemented in sophisticated Companies, where managers ne...

Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping (FHSS) techniques are widely used to implement code-division multiple access (CDMA) in wireless communication systems. Both DSSS FHSS systems help reducing the effects of interference on transmitted information making it robust against channel impairments. uses a signal bandwidth that is much broader than bandwidth. Traditionally, wid...

The farm planning problem is a critical aspect in the design of decision support systems (DSSs) for complex farm advising. Traditionally, the approaches to this problem have been very simple and unable to manage the complexity of the problem, which involves scheduling of field tasks, investment analysis, machinery selection, cost/benefit analysis, and other aspect of the agricultural production...

Forest fire managers in the province of Ontario, Canada have used computer-based decision support systems (DSSs) and actively supported their development since the late 1970’s. I describe four DSS projects in which I was involved and discuss factors that I believe contributed to the success and failure of those initiatives. I then outline some emerging fire management challenges and present som...

Due to the unlicensed nature of 2.4 GHz ISM band, the number of technologies using this band is growing. FCC regulations mandate that these technologies need to implement some form of frequency sharing. Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS) are two popular techniques to share the frequencies within this band. However, devices implementing different ...

In this research paper a technique is introduced to improve Bit Error Rate in cognitive radio. In this paper the FHSS of 32-bit and DSSS of 16-bit is implemented in the network. After implementation of proposed technique results are produced which shown that the proposed approach is far better than that of existing work to reduce BER in a network. Network consists of both wired and wireless top...

D spread spectrum (DSSS) and frequency-hopping spread spectrum (FHSS) technologies have different physical mechanisms for rejecting narrowband interference. Because of these physical differences, they perform differently in the presence of the same levels of narrowband interference. This is an important case for successful operation in the ISM bands. After presenting the physical mechanisms by ...

This paper describes the inception phase of the development process of a Framework for Developing Distributed Cooperative Decision Support Systems (DSSs). It analyzes the reasons why the broad use of DSSs has not occurred yet and makes propositions to improve this situation. It shows that, for the most part, modern distributed computing architectures could solve many of the presented issues. In...

%en a power-line is used as the transmission medium, the information-bearing waveform is usually subjected to high levels of non-Gaussian noise and interference. As a result, direct sequence spread spectrum (DSSS) is a common choice for the signalling format. The power-line channel, however, is power and bandwidth limited, so as not to interfere with electrical equipment. Consequently, this has...