Spread spectrum forms an important aspect of digital communication technology where the message signal is transmitted over a channel having bandwidth much greater than required. Direct Sequence Spread Spectrum (DSSS) belongs to the category of spread spectrum methods and forms an important part in mobile communications. The objective of this paper is to investigate the FIR optimal, Wiener and l...

A programming environment for developing complex decision support systems (DSSs) should support rapid prototyping and modular design, feature a flexible knowledge representation scheme and sound inference mechanisms, provide project management, and be domain-independent. We have previously developed DSSTools (Decision Support System Tools), a reusable, domain-independent, and open-ended toolkit...

Despite their limited water production and efficiency, double-slope solar stills are an appropriate solution for scarcity in hot arid regions. Numerous studies have focused on enhancing the effectiveness of stills. In this context, study introduces a with air heater condenser (DSSS-SAHC). The back cover conventional still was replaced by glass order to recover still’s thermal losses heating air...

Cognitive radio is an encouraging technology for future wireless communication networks. Due to the rapid increase in wireless services, the RF spectrum is going through a scarcity problem. This has forced mobile operators to participate in multimillion dollar auctions to reserve some spectrum resources. Cognitive radio tries to solve this scarcity problem by effectively using the unused portio...

BACKGROUND Dried blood and serum samples are useful resources for detecting antiviral antibodies. The conditions for elution of the sample need to be optimized for each disease. Dengue is a widespread disease in Mexico which requires continuous surveillance. In this study, we standardized and validated a protocol for the specific detection of dengue antibodies from dried serum spots (DSSs). M...

There is increasing interest in the development of decision support systems (DSSs) for river basin management. Moreover, new ideas and techniques such as sustainability, adaptive management, Geographic Information System, Remote Sensing and participations of new stakeholders have stimulated their development. A DSS often encompasses a number of sub-models, such as models for flood risk, ecology...

Jamming is defined as the act of intentionally directing electromagnetic energy towards a communication system to disrupt or prevent signal transmission. In the context of wireless sensor networks (WSNs), jamming is the type of attack which interferes with the radio frequencies used by sensor nodes and may be viewed as a special case of denial of service (DoS) attacks. Herein, we outline the po...

There are three important considerations in DSS development. (1) Decision making Involves both primary and secondary processes, where secondary processes concern selecting appropriate decision making tools, approaches, and information. (2) making decisions, humans are subject to numerous cognitive limitations. (3) In order for end users develop DSSs, sophisticated, problem-oriented DSS generato...

In today’s world of Spread Spectrum based coded mobile communication, security and anti jamming features are added in the physical layer which enhance the performance of mobile devices as compared to existing GSM based uncoded communication. The authors are encouraged to utilize this 3G mobile technology to their PCN ( personnel communication networking ) wireless system. A DSSS based wireless ...

This paper presents a low-power 128-tap dual-channel direct-sequence spread-spectrum (DSSS) digital matched-filter chip. Design techniques used to reduce the power consumption of the system include latch-based register file filter structure, a high-rate compression scheme, optimized compressor cells, and semicustom layout design. To further reduce the power consumption and the hardware requirem...